12GB in Gigabyte 4.0 i7 Bundle Possible?

mothermachine · 15 Sep 2009 at 16:20

Hi all,

I'm currently running the OCUK 920 D0 4.0ghz i7 bundle (Gigabyte not the RampageII).

Is it possible/feasible to get 12GB of Patriot Viper RAM running in this bundle? I've heard it's really hard to get 12GB to work stably with such a huge overclock.

I have zero overclocking experience (hence buying it done for me by ocuk).

Reason I ask is that my work often demands a lot of ram (3d rendering) and I'm already peaking at 6GB and some scenes need more.

Cheers,

HazardO · 15 Sep 2009 at 16:40

6 sticks of RAM places twice the load on the uncore of the i7 (memory controller, l3 cache, and and QPI link), this means more power and more heat. This will limit the overclocking potential of the i7 as it will hit it TDP limit. I wouldn't have thought an i7 920 will do 4GHz with 12G (I know of one person who struggles to get over ~3.4GHz with 12G).

When the 4G DDR3 modules become more available and at a sensible price, you might be able to use 3 4G modules.

mothermachine · 15 Sep 2009 at 17:15

Ok thanks for confirming. Looks like I'm stuck with 6GB for now.

Cheers,

PaulyD · 15 Sep 2009 at 17:28

HazardO said:
6 sticks of RAM places twice the load on the uncore of the i7 (memory controller, l3 cache, and and QPI link), this means more power and more heat. This will limit the overclocking potential of the i7 as it will hit it TDP limit. I wouldn't have thought an i7 920 will do 4GHz with 12G (I know of one person who struggles to get over ~3.4GHz with 12G).

When the 4G DDR3 modules become more available and at a sensible price, you might be able to use 3 4G modules.

4.2ghz:

4.3ghz:

Just tweaking 4.3ghz as it fails blend after about 7 hours at the moment

HazardO · 16 Sep 2009 at 14:55

PaulyD said:
4.2ghz:

Nice, what RAM and what voltage for the RAM?

PaulyD · 17 Sep 2009 at 13:37

Sorry just seen this now

Corsair Dominator 1600Mhz @ 1.66v

Sayso · 21 Sep 2009 at 19:05

But Pauly running large amounts of memory is what your mobo is made for

DavyBoy · 21 Sep 2009 at 19:29

Seen a few people with 12GB hitting 4GHz recently.

mothermachine · 21 Sep 2009 at 20:06

can anyone post up a step-by-step walkthrough on how to get 12GB working with the OCUK UD5 4.0ghz Patriot bundle?

i'm still considering going for it if it's likely to work.

PaulyD · 24 Sep 2009 at 11:50

Sayso said:
But Pauly running large amounts of memory is what your mobo is made for

Yep it loves it

Testing 4.4ghz and getting that stable at the moment

Can't really help on the UD5 but should be a case of just needing slightly higher QPI/VTT voltage to stabilise it

HazardO · 24 Sep 2009 at 13:17

Given the memory controller is onbaord the CPU, I'd have thought that getting a decent overclock with 12G of RAM would be more dependant on having a lucky CPU rather than the motherboard. I notice you had to up the memory voltage a touch to get it working, this I've been lead to believe significantly increases CPU temps, but you're using water I see so maybe not an issue for you.