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No Dual Channel on TUF X299 Mark2

Level 7
Hi folks

I have an issue trying to enable dual channel on this board. I have enabled XMP and have the dimms in the grey slots a1, b1, c1, d1. They are working but not performing well as shown in the UserBenchmark

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

I tried clearing the CMOS and running one dimm and two dimms but no difference.

CPU-Z has DC mode box blanked out.

Any input would be very welcome, thanks

Level 7
Running most up to date BIOS (1102)

Level 40
Hey Dogeared 🙂

What is CPUz reporting for speed?

You have a quad channel board and the RAM should be working quad channel....just check it's running at 3000MHz not 2666

Hello mate 🙂 Here's a screenie from CPU-Z


Ok, so it's running slightly overclocked 2666

Level 40
Does it have a couple of XMP profiles? maybe one 2666 and one 3000...I presume the benchmark is measuring that 80 odd percent as not 3000...

Basically calling you out for not OCing it to it's rated speed hehe

No it has disabled or profile1, I may be able to tweak it up to 3000 however, I'll have a look 🙂

SO I take it dual channel doesn't apply then

God I sound such a newbie 😛

Level 13
Quad is more desirable IMO 😉 .

Using slots A1, B1, C1, D1 = Quad channel.

Using slots A1, A2, C1, C2 = Dual channel.
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Level 40
Dogeared wrote:
SO I take it dual channel doesn't apply then


What is the exact kit part number?

If it's 3000 rated it ought to have a 3000 profile...

Is it a single quad channel kit? or two dual channel kits combined?