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2x8 in quad channel motherboard

mgrinspan
By mgrinspan
in CPUs, Motherboards, and Memory
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Posted

Hi all,

 

About a year ago when I built my PC I was blissfully unaware of single/dual/triple/quad channels. I bought a 2x8 set and installed both sticks next to each other (in the same channel). Today I looked at the manual for the first time and realized I'm getting half the bandwidth I could be getting.

 

The manual wants me to put 1 stick in dimm D1 and 1 in B1. The only problem with that is that A1, A2, B1, and B2 are all blocked by my radiator.

 

My question is; would I get the same dual channel performance if I put the sticks in C1 and D1?

 

My motherboard is ASUS X99-E and my ram is 2x8 Corsair Vengeance DDR4-3000.

 

Direct link to motherboard manual: https://dlcdnets.asus.com/pub/ASUS/mb/LGA2011/X99-E/E11534_X99-E_UM_WEB.pdf

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just do that, and use CPU-Z to check.

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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3 minutes ago, Jurrunio said:

just do that, and use CPU-Z to check.

Didn't realize I could do that, thanks!

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12 hours ago, Jurrunio said:

just do that, and use CPU-Z to check.

I figured I'd check once before changing anything, and it already says dual... How is that possible on DIMM D1 and D2?

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Check the user manual. They all have a full chart with all possible configurations from 1 up to all 8 populated DIMMs.

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8 minutes ago, RejZoR said:

Check the user manual. They all have a full chart with all possible configurations from 1 up to all 8 populated DIMMs.

The manual only shows the recommended slots for configurations of 1/2/4/6/8 sticks. I have 2 sticks but am asking about unmentioned configuration.

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1 hour ago, mgrinspan said:

I figured I'd check once before changing anything, and it already says dual... How is that possible on DIMM D1 and D2?

because witch craft?

 

You can also use AIDA64 memory tests, dual channel setups should perform a lot better than single channel

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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6 minutes ago, Jurrunio said:

because witch craft?

 

You can also use AIDA64 memory tests, dual channel setups should perform a lot better than single channel

I ended up moving a stick so I'm at C1 and D1. I ordered a new case this morning that'll allow me to front-mount my radiator so this shouldn't be a problem after that gets here. Thanks for your help though!

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