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2990WX memory channels

DahPython
By DahPython
in CPUs, Motherboards, and Memory
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Go to solution Solved by Stefan Payne,
1 hour ago, DahPython said:

Building a Threadripper 2990WX workstation build. For 64gb of ram, Should I get 4x16, or 8x8. For the 2990WX is it better to fill up all 8 DIMM or 4 DIMM slots.

2990WX only has Quad Channel, so more than 4 reduces the max. Clockrates on the Memory Channel.

8 Channels is something only EPYC has and maybe something you might want to look into anyway!!

Though it has to be said that Epyc seem to have lower clocks than Threadripper - but double the Memory Channels...

Depending on the Workload, it might make sense to think about that and its not much more expensive.

 

However keep in mind that Windows has some Problems with the 32 core AMD Chips for whatever reason...

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Building a Threadripper 2990WX workstation build. For 64gb of ram, Should I get 4x16, or 8x8. For the 2990WX is it better to fill up all 8 DIMM or 4 DIMM slots.

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1 minute ago, DahPython said:

Building a Threadripper 2990WX workstation build. For 64gb of ram, Should I get 4x16, or 8x8. For the 2990WX is it better to fill up all 8 DIMM or 4 DIMM slots.

4x16

 

More memory modules can require lower memory clocks or looser timings due to the increased electrical load on the bus.

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4x16, this is a quad channel CPU and less sticks means more empty slots for future upgrades

CPU: i7-2600K 4751MHz 1.44V (software) --> 1.47V at the back of the socket Motherboard: Asrock Z77 Extreme4 (BCLK: 103.3MHz) CPU Cooler: Noctua NH-D15 RAM: Adata XPG 2x8GB DDR3 (XMP: 2133MHz 10-11-11-30 CR2, custom: 2203MHz 10-11-10-26 CR1 tRFC:230 tREFI:14000) GPU: Asus GTX 1070 Dual (Super Jetstream vbios, +70(2025-2088MHz)/+400(8.8Gbps)) SSD: Samsung 840 Pro 256GB (main boot drive), Transcend SSD370 128GB PSU: Seasonic X-660 80+ Gold Case: Antec P110 Silent, 5 intakes 1 exhaust Monitor: AOC G2460PF 1080p 144Hz (150Hz max w/ DP, 121Hz max w/ HDMI) TN panel Keyboard: Logitech G610 Orion (Cherry MX Blue) with SteelSeries Apex M260 keycaps Mouse: BenQ Zowie FK1

 

Model: HP Omen 17 17-an110ca CPU: i7-8750H (0.125V core & cache, 50mV SA undervolt) GPU: GTX 1060 6GB Mobile (+80/+450, 1650MHz~1750MHz 0.78V~0.85V) RAM: 8+8GB DDR4-2400 18-17-17-39 2T Storage: HP EX920 1TB PCIe x4 M.2 SSD + Crucial MX500 1TB 2.5" SATA SSD, 128GB Toshiba PCIe x2 M.2 SSD (KBG30ZMV128G) gone cooking externally, 1TB Seagate 7200RPM 2.5" HDD (ST1000LM049-2GH172) left outside Monitor: 1080p 126Hz IPS G-sync

 

Desktop benching:

Cinebench R15 Single thread:168 Multi-thread: 833 

SuperPi (v1.5 from Techpowerup, PI value output) 16K: 0.100s 1M: 8.255s 32M: 7m 45.93s

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1 hour ago, DahPython said:

Building a Threadripper 2990WX workstation build. For 64gb of ram, Should I get 4x16, or 8x8. For the 2990WX is it better to fill up all 8 DIMM or 4 DIMM slots.

2990WX only has Quad Channel, so more than 4 reduces the max. Clockrates on the Memory Channel.

8 Channels is something only EPYC has and maybe something you might want to look into anyway!!

Though it has to be said that Epyc seem to have lower clocks than Threadripper - but double the Memory Channels...

Depending on the Workload, it might make sense to think about that and its not much more expensive.

 

However keep in mind that Windows has some Problems with the 32 core AMD Chips for whatever reason...

"Hell is full of good meanings, but Heaven is full of good works"

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