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Vengeance LPX DDR4 on Asus TUF X299 Mark 2


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Hi folks, I'd appreciate any advice on getting this RAM up to speed as it appears to not be running correctly.


I benchmarked on UserBenchmark and it suggests the RAM is not configured correctly.




I checked the BIOS and XMP is enabled. I also checked the dimms are in the correct slots (A1, B1, C1, D1)



UserBenchmarks: Game 73%, Desk 123%, Work 103%

CPU: Intel Core i7-7800X - 108.7%

GPU: Nvidia GTX 970 - 65.1%

SSD: Samsung 960 Evo NVMe PCIe M.2 250GB - 223.1%

SSD: Samsung 850 Pro 256GB - 111.9%

SSD: Samsung 840 120GB - 56%

RAM: Corsair Vengeance LPX DDR4 3000 C15 4x8GB - 84.6%

MBD: Asus TUF X299 MARK 2

Windows 10 64

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Just had a look, this is what it says:


Northbridge Intel Skylake-X rev. 04

Southbridge Intel X299 rev. 00

Graphic Interface PCI-Express

PCI-E Link Width x16

PCI-E Max Link Width x16

Memory Type DDR4

Memory Size 32448 MBytes

Channels Quad

Memory Frequency 1346.8 MHz (1:20)

CAS# latency (CL) 15.0

RAS# to CAS# delay (tRCD) 17

RAS# Precharge (tRP) 17

Cycle Time (tRAS) 35

Row Refresh Cycle Time (tRFC) 467

Command Rate (CR) 2T

tCCD 4

tCCD_L 7



Uncore Frequency 2727.0 MHz

Host Bridge 0x2020

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I see quad on there.


Yeah :biggrin: The advice on the UserBenchmark misled me, it's running in quad so dual channel doesn't appear in CPU-Z.


The XMP profile wasn't working right and that's why it was slow - I tweaked it manually in the BIOS so that each channel is running at 1515, so effectively 3030.


Thanks for your input.

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