R620 ram configuration. See your SAS adapter documentation for more information. R620 ram configuration

 
 See your SAS adapter documentation for more informationR620 ram configuration We have an R620 with Intel X540T2 10Gbps adapter (2 x 10Gbps), a pair of Intel 1Gbps ports, plus a pair of Dell SAS 6Gbps HBAs connected to a pair of PowerVault chassis

PowerEdge Hardware General. The system has 384GB of DDR3 LRDIMM Memory and I'm able to choose between any of the following modes: Optimizer Mode. Hi, We have upgraded our Dell R620 with four new dimm dual Rank of 8GB @1333MHz. 5” drives or up to sixteen 2. 90GHz 8 Core CPUs . There are three channels and two banks. LRDIMM This new memory option, load reduced DIMM (LRDIMM), is designed with a Pulse-width modulated (PWM) fans with an increased number of fan zones and configuration-dependent fan speeds; Use of DDR3 memory (lower voltage compared to DDR2, UDIMM) Processor VR dynamic phase shedding; Memory VR static phase shedding; Random time interval for system start; Ability for an entire rack to power on without exceeding the. Refer to the diagram below: In populating memory, the memory in each channel has. Shop with us! Skip to content. I have a R620 with 8x8gb ram. Along with standard RDIMMs and. Dell PowerEdge R620 Server Memory If you are looking to maximize your server's memory while staying within your budget. 24 x 1. 68 TB and speeds from 3GB/s to 6GB/s depending on. Additionally, it offers more expansion slots and higher maximum power supply wattage. The R620 comes in various bay configurations (four-bay, six-bay – supporting Express Flash (EF) Solid State Drives. RAID Card: Dell PERC H710 RAID Controller . Shop with us!The r620 isn't as loud as my r410s, so under the desk might be do-able. Just added to your cart. Memory Configuration: 1. Hey Sysadmin. Front-panel features and indicators. Shop with us! Skip to content. 5" 1TB refurbished SAS disks , bought in batches of 10 off eBay. Poweredge (58 pages) Server Dell PowerEdge R620 Technical Manual. 2133MT/s DDR4 memory Certain models of the E5-2600 v3 processors support 2133MT/s memory. The PowerEdge R630 was launched in 2014 and was intended to be a direct upgrade to the PowerEdge R620, which came out two years earlier. 16GB in 1-4. Crucial Scanner. 5" SFF 1U Server - Configure To Order - Choose your Processor(s), Memory, Storage, Storage Controller, Power Supplies, and More!. About Your System. PowerEdge R510 RAM Upgrade. Submit. Hello, I have a damaged DIMM_B1 slot on the Poweredge r630 server with two CPUs. You're also space limited especially if you have a mini raid card. The R610 manual says. Learn how to quickly and easily install a Crucial® SSD (solid state drive) in a desktop, laptop, notebook, or Mac system. Learn More. About your system. In the case of Ubuntu, I installed it from a USB but when I rebooted the server, it wouldn't load the OS unless I plugged in the flash drive. Hi Daniel, Here are all the Specs: OS: Proxmox VE 5. 2. Dell EMC PowerEdge R640 overview. Drivers & Downloads. If there is any memory populated in slots 9-12 then the max speed is 1333. 5” HDD Trays, PERC S110 RAID, 4X 1Gb NIC, 2X 750W (Renewed): Servers. 1-832-478-9159 Monday - Friday 9 am - 5 pm. Memory mode: optimizer. Memory Configuration: 64GB - 8x8GB PC3-10600R DDR3 Registered . We also want to upgrade our r620. Dell PowerEdge R620 Owner's Manual. The problem is you don't have any 8 pin PCIe power you can use for the GPU. Advanced ECC (Lockstep) Memory Optimized (Independent Channel). Get complete control with our powerful, flexible and reliable dedicated server hosting. 5 Inch (SFF) Bays. Both machines have the following configuration 2xE5 2660V2 8x16GB 2x1TB 7. The Dell PowerEdge R620 is a Dual Processor system with 12 DIMM slots per CPU. The system will run but with less memory than is physically available. Dell PowerEdge R620 Technical Guide server for virtualization transactional databases PowerEdge R630 Technical Guide Ultra-dense, configurable, 2-socket, 1U versatile rack. "For single or dual-rank memory modules: • One memory module per channel supports up to 1333 MHz. In populating the server the guidelines you need to adhere to, and make sure the new dimms aren't violating is; 1) you can't mix Rdimms and Udimms, so ensure that they are the same. The R620 has four memory channels per processor, with each channel supporting up to three DIMMs. 5TB Max (24 x 64GB LRDIMM) 512GB Max (16 x 32GB RDIMM) 64GB Max (16 x 4GB UDIMM) Installed Memory:This should not be an issue at all. Front-Panel Features And Indicators. Max Registered DDR3 SDRAM: 128 GB / Max Unbuffered DDR3 SDRAM: 16384MB memory type, and comes installed with 1GB (Removable) memory. ; Verify or Change the RAID Configuration. M. When a greater capacity of storage is required, the R720 boasts up to eight 3. Server Dell External OEMR R620 Owner's Manual. The memory buffer minimizes the load on the server memory bus. For more information on hardware. Compare. The R620 has four memory channels per processor, with each channel. . Dell PowerEdge R620 Server Memory "How To Guide" for RAM installation and configuration. You're also limited to 75w off the PCIe slot. 2 GHz dual core processor. How should the layout be, I have gone through [ Dell PowerEdge R620 Owner's M. Click Virtual Disk Management on the Main Menu. Close search. Backplane. ago. No memory modules were detected. Restored the jumper back to "retain BIOS config" and the system continues to be stuck at "Configuring Memory" on boot. By enabling Fault Resilient mode, you can create a h. Tried to replace these with 384gig (24x 16gb pc3l-8500r memory). bios. RAID Card: Modular Dell H310 Mini PERC RAID Controller . Figure 4: Reboot iDRAC button. Bonjour, J'ai un serveur R620 avec 96 GO de RAM : A1-A6 = DIMM DDR-3 8Go B1-B6 =. The diagram below is illustrated with a Dell R620, but the principles would be the same for virtually all servers. R440 PowerEdge R450 PowerEdge R510 PowerEdge R515 PowerEdge R520 PowerEdge R530 PowerEdge R540 Poweredge R550 PowerEdge R620 PowerEdge R630 PowerEdge R640 PowerEdge R6415 Poweredge R650. Qty: View cart () Continue shopping 1-832-478-9159 Monday -. I have a Dell R620 that is stuck "loading the Bios Driver", I've tried various ways like trying the nvme jumper, trying to unplug the. 5-inch hard. Power Supplies: 2x 495W PSU for Dell R2 Servers . I recently upgraded my ram from 32gb to 64gb for my r620. Qty: View cart () Continue shopping Check Out Our YouTube Channel !memory density with an optional GPU accelerator (some with more than 500 cores). Troubleshooting Your System. In some ways they're getting a bit long but still nothing to be sneered at. Also, OpenManage Server Administrator can be installed in different deployment scenarios to minimize the footprint on the managed system and remotely managed. 24x32GB modules for a total of 768GB, compared to 24x64GB modules. $139. LRDIMM or load-reduced DIMMs are (used in enterprise servers) support highest density modules and contain a memory buffer (MB) component usually made by IDT or Montage. Most Windows computers made in the last decade, including laptops, can run Skyrim. Boot devices such as storage controllers and network interface controllers require increasing amounts of memory to execute theirThe dell PowerEdge R620 is a 1U rack server that supports up to 10 storage drives with a maximum capacity of 10 TB. 2 devices are read-intensive (1 DWPD) with 480GB or 960GB capacity. Rack installation instructions — sliding rails (2 pages) Server Dell PowerEdge R610 Manual De Usuario. Parts & Repairs. Cable management arm installation instructions (2 pages) Server Dell PowerEdge R620 Installation Instructions. Visit the PowerEdge memory page on Dell. Maximum configured DDR3 12800R memory is 768GB (24 x 32GB). Can you try only with one DIMM (on slot A1) if you have single CPU or 2 DIMM (A1 and B1) if you have dual CPU and see. If you suspect a bad DIMM then try this. We updated all firmware to the latest for all servers. Hard-Drive Indicator Patterns. Hey, I got my first Dell server yesterday, an R620. I just put the 2 RAM in, and after a few tries it always worked. However, what I always recommend to anyone dealing with Server RAM, make sure that you are doing everything according to vendor recommendations of DIMM configuration and population to avoid any potential issues. 4 Resource Allocation for Boot Device Firmware Traditional BIOS implementations offer limited memory space for boot device firmware. With its hyper‐dense memory — up to 768GB in a 1U form factor — and powered by the Intel® Xeon® processor E5‐2600 and E5‐2600 v2 product families, the R620 shines when 2x Intel Xeon E5506. I downloaded the latest one and the install errored out. Boot to F11 on Dell Splash screen, selecting Boot Manager -> System Utilities -> Launch Dell Diagnostics. Evolving from the previous 11th Generation Dell PowerEdge R610, the Dell R620 uses the latest in Intel Xeon Scalable processors from the E5-2600 V1 & V2 family. DDR4-3200MT/s • 64GB Module Capacity • 8Gb Die Density • LRDIMM • 4 Rank x 4 • PC4-25600 • CL=22 • Ext Timing 22-22-22 • 1. In addition to this, since all the DIMMs are identical, the memory configuration allows me to set Node. The Integrated Dell Remote Access Controller (iDRAC) is designed to make server administrators more productive and improve the overall availability of Dell servers. Causes: The Advanced ECC option was enabled in BIOS, but is no longer valid due to an unsupported memory configuration, possibly a faulty or removed memory module. I have three dimms, (the two 16gb dimms are same company, timing, size, and speed and have worked in a full configuration prior) 8x16Gb PC3L-12800R-11-13-E2 Micron MT36KSF2G72PZ-1G6N1MF, 8x16Gb PC3L-12800R-11-13-E2 MT36KSF2G72PZ-1G6E1FE, and 8x32Gb PC3L-10600R-9-13-AB1 SK Hynix. Redundant Hot Plug Power Supplies: Drive Bays / Backplane: 8x 2. R620 Ram Configuration. . Dell PowerEdge R620 Server Memory If you are looking to maximize your server's memory while staying within your budget. Hi, I have an issue when restarting Dell R620 server (2 CPU)At the time of reboot, the server stack when checking the memory (Configuring memory)The server uses mixed memory 8 (single rank) and 16. Compare. Crucial SSDs. Pack more computing power into a space-challenged data center with the PowerEdge R620, which offers an exceptionally large memory footprint along with balanced, scalable I/O capabilities, including integrated PCI ®Express (PCIe) 3. MemoryUp StoreVisit Store. The R620, which is the next generation, will be the first Dell server product. A hyper-dense 2-socket, 1U rack server, PowerEdge R620 has a large memory footprint and impressive I/O options that make it an exceptional platform for. Since the memory controller is integrated into an Intel ® Xeon ® processor, selecting the processor is also a crucial part of building an optimal memory configuration. Select Diagnostics. dell-poweredge. Processors: 2x Intel Xeon E5-2690 - 2. Shop with us! Skip to content. Hard-Drive/SSD indicator patterns. One is working fine and the other is throwing memory errors. Dell PowerEdge R620 Server Memory If you are looking to maximize your server's memory while staying within your budget. What Dell PowerEdge R620 memory speed is supported? DDR3-1066, DDR3-1333, DDR3-1600 and DDR3-1866. The RAM is ECC DDR3 1667Mhz 1. In case that the system does not go past Memory Configuration, bring the system to minimum to POST configuration with the following. Make & Model: Dell PowerEdge R620. Je voudrais rajouter 64 Go de RAM sur ce serveur, quelle serait la meilleure solution ? Pour cet upgrade mémoire il sera impératif de bien respecter une symétrie entre les barrettes du CPU1 (A1-A6) et celles du CPU2 (B1-B6). Please note: Stock photos are used in this listing and may differ depending on configuration. For the Dell PowerEdge R620 Server. 5 Inch Hard-Drive. The server supports a maximum RAM of 768 GB and is. We will. Dell R620 Memory Configuration. 80,890/-Server for E-commerce website: Dell R620 Server : 2 X 10 core/ 64GB RAM, 1 X 480 GB SSD, 3 X 600GB SAS HDD: Rs. Spare Mode. Hi Tested and found 1 DIMM to be faulty, removed it and Server running fine now. A hyper-dense 2-socket, 1U rack server, PowerEdge R620 has a large memory footprint and impressive I/O options that make it an exceptional platform for space-sensitive environments. Each memory channel manages three DIMM slots. Load Reduced modules, also known as LRDIMMs, are not an option for the PowerEdge R610 server. 24 DDR4 DIMM slots Maximum RAM. Connects up to three PCIe expansion cards. The Dell PowerEdge R620 was released in 2012 and was designed to upgrade to the PowerEdge R610. System memory. RAM Speeds. Expansion Options. Keep in mind that this pertains to physical installs. In this video, we will teach you the proper way to install memory into your Dell Poweredge R630 Server. Once you do that then move the NVRAM jumper over and then power up. Memory Settings screen; Processor Settings Screen; SATA settings screen details; Boot Settings screen; Integrated devices screen; Serial communications screen; System Profile Settings screen; System security screen; Miscellaneous settings; System and setup password features. 2. Instead of 16 and 8 you would put 32 and 8. In the System Setup Main Menu, click System BIOS > System Memory. The same applies to the memory on slots of channels CH0, CH1 and CH2 of CPU2. Front-Panel Features And Indicators. If you go to 2 memory modules per channel it would free. • Two memory modules per channel supports up to 1067 MHz. The options available are Optimizer. Server Dell PowerEdge R620 Getting Started Manual. . Dell R620 Server Includes Intel Xeon E5-2600 Family Of CPUs, 24 DIMMs Slots. Each memory channel manages three DIMM slots. CPU 2: Memory channel 1, slot 1: 16GB, slot 2: 4GB, slot 3: 4GB. They are all dual rank modules. The setting for 'Memory Operating Mode' is fixed (not changeable) at Optimizer Mode. Memory can be mixed within a channel, but all memory within a bank should be identical. On the last video we unboxed the Dell PowerEdge R620, so today we're configuring the Dell PowerEdge R620 iDRAC port for easy remote access. For the 10 disks I paid £56. 5TB Max (24 x 64GB LRDIMM) 512GB Max (16 x 32GB RDIMM) 64GB Max (16 x 4GB UDIMM) Installed Memory: Instantly check how much Memory you currently have installed. It looks like it is the same DIMM as the LRDIMM but presents itself. Documentation. Dell PowerEdge R620 Owner's Manual. 34. 7Ghz, with total of 16 cores/32 threads, 64GB memory and 8 brand new Dell certified 600GB 10K drives. What Dell PowerEdge R640 memory speed is. We can configure up to 10 x 2. Back-panel features and indicators. You cannot mix 16GB and 8GB DIMMs. Source: Windows Central (Image credit: Source: Windows Central). The first and most economical option is for you to purchase additional 2x4GB DIMMs to raise your memory capacity to 32GB. Intel® Optane™ DC persistent memory Up to 6 per CPU socket. . Dell PowerEdge R730 system overview. Interesting. Drivers & Downloads. We have a R620 with Dual (Intel (R) Xeon (R) CPU E5-2665 0 @ 2. A chassis cannot be reconfigured or upgraded after point of purchase. NIC Indicator Codes. There are currently 8 DIMM slots with 32GB each in use (8x32GB RDIMM -> 256GB). (48 pages) Server Dell PowerEdge Portfolio Manual. Power supplies and hard drives are hot-swappable. The System Memory screen allows you to view all the memory settings as well as enable or disable specific memory functions such as system memory testing and node interleaving. 99% Uptime SLA. 2. If the memory is damaged, the. 1. Server RAM upgrade » PowerEdge R620 R-Seriesby Dell. Chassis weight. Having no budgets, we bought 10 used R620 off eBay resellers. B1, B2, B3, B4, B5, B6. So when/if i need to move it, i can. If I replace the 6x 8GB dimms with 16GB dimms, do I need to have the same part number. Remove all the new memory, and boot the server, make sure it’s happy at original config. 20GHz 8 Core . Populate A1 and B1 and test. Once I get into the OS and am running debian or FreeBSD, it's perfectly detected with no issues, and AFAICT, it passes traffic with no issue. PowerEdge R620 a été conçu spécialement pour ces environnements. Special Shipping. Close search. NOTE: 16 GB DIMMs must be installed in slots numbered A1, A2, A3, A4, B1, B2, B3, and B4 and 8 GB DIMMs must be installed in slots A5, A6, A7, and A8. 2 SSDs on. An adapter-type PERC is. Your configuration sounds correct. . DIMM Type Speed Configuration Guide Lifetime Warranty DIMM TYPE LRDIMM 34 RDIMM 273 UDIMM 74 Memory Size 1x 64GB 3 1x 32GB 52 1x 16GB 77 1x 8GB 144 1x. Server Basket sells both new and refurbished servers that are budget-friendly and ideal for virtualization, data based and HPC, etc. Qty: View cart () Continue shopping 1-832-478-9159 Monday -. Fast UK and EU Delivery. Four optional NVMe Express Flash PCIe SSDs. Currently I have 8x16GB (128) RAM, I'm looking to add 128 GB more. The R620 has the flexible memory feature, so there are many memory configurations that will likely work. 一台dell R730 服务器。开机的时候一直显示configuring memory,如下图。 内存条也换过,idrac中可以检测到内存条的存在。 根据搜索到的方法使用idrac更新bios,将任务添加进去以后服务器自动重启。重启后Scheduled 一直都是0%,而开机画面仍然卡在configuring memory,如下图 固件版本和idrac版本如下图 更新bio. Accomplish more. PowerEdge R610 offers simplified management, purposeful design, and energy efficiency combined in a rack server that can help you better manage your enterprise. 5-inch drive bays, and two PCIe. Dell PowerEdge R620 Server / 2x E5-2630 v2 12 Cores / 64GB / 4x 600GB HDD. See your SAS adapter documentation for more information. So I'm running a Dell R620, and I picked up this nice Mellanox LX EN Connectx-4 rNDC (Part number R887V) which was designed for a Dell R630. Hi Chris, Thanks for your reply. 0, WiFi, Bluetooth, Windows 10 Pro (Renewed). There are currently 8 DIMM slots with 32GB each in use (8x32GB RDIMM -> 256GB). The term YES CERTIFIED applies only to the exact configuration documented in this bulletin. What Dell PowerEdge R610 memory speed is supported? DDR3-1066, DDR3-1333, DDR3-1600 and DDR3-1866. See your SAS adapter documentation for more information. 5 Inch Hard-Drive System Item Indicator, Button, or2933 MT/s memory and twenty-four 288-pin DIMMs. Servers with such high memory capacities can support multiple virtual machines and allows you. This unit comes equipped with up to 24 DIMM slots that utilize DDR3 ram and support speeds of 1866MT/s. Channel 1 - slot 2. About Your System Topics: • Front-Panel Features And Indicators • LCD Panel Features • Diagnostic Indicators • Hard-Drive Indicator PatternsPage 18 of the PowerEdge R620 Technical Guide. 0 slots + 1 storage slot: two x8 slots, one storage x4 slot RAID Controller Internal: PERC H200 (6Gb/s) PERC H700 (6Gb/s) with 512MB battery-backed cache; 512MB, 1GB Non-Volatile battery-backed cache SAS 6/iR PERC 6/i with 256MB battery. 5" SFF 1U Server . Up to 8 processors per core. Each has dual XEON E5-2680 2. 2666 MT/s DDR4 memory The Intel® Xeon® Scalable processor product family supports 2666 MT/s memory and sixteen 288-pin DIMMs. PowerEdge Hardware General. You shouldn't mix memory within a group, and the A and B lanes should be identical configurations. The options available are Optimizer Mode,. With an exceptionally large memory footprint combined with balanced, scalable I/O capabilities, including integrated PCI Express® (PCIe) 3. What is an unbuffered memory module? Unbuffered, non-registered DIMM memory modules have no buffer/register component between the DRAM modules and the motherboard memory controller. Network: Dual-Port 10Gb + Dual-Port 1Gb Ethernet Network Daughter Card. Close search. Shop with us! Skip to content. Refurbished Dell 2GB 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10600) ECC Unbuffered System Specific Memory Model DM0KY. Chassis: Dell R620 Gen I 8-Bay Hot Swap PSU . I get message in idrac console on bootup that shows each channel says exceeded maximum total number of ranks supported. I have an 8-bay R620 with Dual Xeon CPU (E5-2670 v2), SAS interface and 192Gb RAM and will run Linux, probably Ubuntu server. That looks like a good combination as 2 slot is not working. A hyper-dense 2-socket, 1U rack server, PowerEdge R620 has a large memory footprint and impressive I/O options that make it an exceptional platform for space-sensitive environments. Server RAM upgrade » PowerEdge R620 R-Seriesby Dell. 5″ 7. This means the R720 will only support two Quad Rank or two unbuffered DIMMs per channel. Chassis: 1U Rack. 7058 02-06-2019 19:00 PM r620 stuck on configuring memory I recently upgraded my ram from 32gb to 64gb for my r620. The R630 supports three DIMMs per channel at 1866MT/s with these processors. 99. You will need to use 4 x16GB and 4. Cooling fan specifications. File Name: R620-020102C. 20-09-2019 01:00 AM. $ 226. 1. 8-inch hard drives or 10 x 2. wipe the hdd data properly (may be any software crash) and install the windows 10 again. #1. Diagnostic indicators. Submit. Remote Access: iDRAC7 Express . <Ctrl<R> Enters the PERC configuration utility. Just added to your cart. 2 Enterprise Class NVMe SSDs. Remote Access: iDRAC 7 Express . Condition: Manufacturer Refurbished Server. + Mirror mode. Overview. . The R720 and R720xd support two DIMMs per channel at 1600 MT/s with these processors. This eliminates the need to use and maintainThe issue was a combination of 1 bad memory module and a bad cpu socket (damaged pin). Update the bios and the DRAC. Along with standard RDIMMs and. 0Ghz (12-cores Total), 32GB RAM, 4X 2. Insert the Ubuntu disk into your DVD drive or connect your bootable USB into a port on the computer. 8GB Samsung PC3L-12800R DDR3L 1600 1Rx4 M393B1G70BH0-YK0 Looking at the the. 5". For more information and great on Dell and HP servers. in order to have hot swap SSD drive in R620 you need to have a Dell PowerEdge Express Flash NVMe PCIe card. Network Controller. As for testing the DIMMs, sounds like some serious time will have to be spent, will test them andDell PowerEdge R620 Server Memory If you are looking to maximize your server's memory while staying within your budget. i have dell R620 dual xeon comes with installed RAM 8gb x 16 units. It now won't finish the "Configuring Memory" step. Dell PowerEdge R720 Memory Configuration Guide. I tried disabling. Power Supplies: Redundant 750W Power Supplies. On the Intel Server Board, memory channels are. For RDIMMs, the max configuration is 512GB via (16 x 32GB) DDR3 PC3-12800R 1600MHz ECC Registered Server Memory. Shop with us!Dell PowerEdge R620 Server Memory If you are looking to maximize your server's memory while staying within your budget. What is an unbuffered memory module? Unbuffered, non-registered DIMM memory modules have no buffer/register component between the DRAM modules and the motherboard memory controller. Why may there be various speeds of Dell PowerEdge R610 memory? A hyper-dense 2-socket, 1U rack server, PowerEdge R620 has a large memory footprint and impressive I/O options that make it an exceptional platform for space-sensitive environments. Select Diagnostics. Just added to your cart. With ECC Unbuffered memory, 48GB (12 x 4GB) is the max. Another important guideline is to populate equivalent ranks per channel. Memory Configuration: 256GB PC3-10600 DDR3 Memory . . memory configuration that is optimized for price, performance, power, and/or RAS based on user input. I want to add more ram to my r620 which currently has 32gb of ram (4 x 8gb). Looking for memory population rules of the Intel® Server Board S2600WF Family. The same goes for the other two groups of memory. Causes: The Advanced ECC option was enabled in BIOS, but is no longer valid due to an unsupported memory configuration, possibly a faulty or removed memory module. . Designed for versatility and high performance, it provides many of the virtualization, system management, and energy-efficiency 57 products. What Dell PowerEdge R620 memory speed is supported? DDR3-1066, DDR3-1333, DDR3-1600 and DDR3-1866. 8GB Samsung PC3L-12800R DDR3L 1600 1Rx4 M393B1G70BH0-YK0. Hi, I have a Dell R620 with 18 DIMM Dual Rank DDR3 [&nbsp;8GB 2Rx4 PC3 10600R 1333MHz ] modules, totaling 144GB. To set the Memory Operating Mode to Fault Resilient mode, log in to iDRAC and do the following: Click the Configuration pulldown menu. See the Memory section for details. The memory buffer minimizes the load on the server memory bus. Then you could do this: CPU 1: Memory channel 1, slot 1: 16GB, slot 2: 4GB, slot 3: 4GB.