DDR4 and motherboard/CPU queries

harz_marz · 16 Aug 2015 at 21:06

Ok a few quick questions about issues with my new setup (i5 6600K, Asus Z170-A, 8GB DDR4 3000 Mhz RAM)

- In the bios, with XMP activated the RAM is running at 2133 Mhz instead of the 3000 Mhz. In CPU-Z it is showing at half this speed which I know is normal (1096 Mhz). Why is this? How can I get it running at it's advertised speed?

- I have done the "EZ" overclock option from the bios, chip is now running at 4.2 according to CPU-Z. Is this accurate? It was very easy to do. I have never overclocked before and wary of changing voltages etc but wanted a boost on the stock speed of 3.5. Is this chip now actually overclocked? Or is it more complex that that? I would be happy for now to keep it at 4.2.

Thanks!

mushtafa · 16 Aug 2015 at 21:30

Has the RAM got two XMP profiles in the BIOS? Did you set the XMP before the EZ overclock? Perhaps the overclock changed the RAM settings? Try it again.

harz_marz · 16 Aug 2015 at 21:38

There was always just one XMP profile as far as I can remember. The RAM speeds were the same before the overclock and after.

Bart_Hunt · 16 Aug 2015 at 21:48

Odd. I had 2 profiles on my old evga classified board.
Not saying that all have this but most do.

Jumper118 · 16 Aug 2015 at 22:01

harz_marz said:
There was always just one XMP profile as far as I can remember. The RAM speeds were the same before the overclock and after.

if xmp doesn't work, then put the xmp setting in manually. also some kits of ram have 2 xmp setting, but some only have 1.

mushtafa · 16 Aug 2015 at 22:50

What RAM is it?

harz_marz · 16 Aug 2015 at 23:22

Thanks all for the advice but still not 100%. It is "Corsair Vengeance LPX 8GB (2x4GB) DDR4 DRAM 3000MHz C15 Memory Kit"

Mustang · 17 Aug 2015 at 01:07

Load optimised defaults, then enable XMP profile, is it correct now?

Greybeard · 17 Aug 2015 at 23:14

Mustang said:
Load optimised defaults, then enable XMP profile, is it correct now?

This is exactly what I would do. And if that doesn't work, I'd enable XMP then manually put in the DRAM values in your BIOS. DRAM freq, DRAM voltage, and primary timings.