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[Official] Asus Rampage IV Black Edition Owners Club! - Page 661

post #6601 of 14765
Hello here,

I think I have a problem related to the RIVBE in SLI mode.
I'm running 4930K (4500), strap 125 / memory 2333 C9 and 2 780ti in SLI (flashed with Skyn3t bios).

So for example, in 3Dmark13, I get approx' 13800/13900 graphic points with one card.
In SLI, I get 25600.

I tested each card and both give the same results in single mode.

My Ti are from EVGA, step-up from two 780 Classified.
When I was running these 2 cards on a Rampage IV Extreme (with same CPU and ram at same clocks), I got 12700 in single mode and 24780 in SLI (1350 on GPU).
In that case, scaling is really good : almost 95%

But for the 780 Ti SLI, scaling is really lower than expected, 85%

Is there an explanation? I noticed that a few other R4BE users have lower scores in 3D.
A friend of mine running EVGA Dark has a good scaling with 2 780 Ti (95%).

Upping some voltages doesn't change anything (I upped vccsa a bit since it handle PCI-E lanes on the CPU), 150% to CPU Current Cap, etc.

The OS is the same as when I was running 780 Classified on the R4E, it's clean and no useless programs running when I'm running 3D benches.

Only things that have changed are the motherboards and GPU's (tried older nvidia drivers, same thing). I use a Corsair AX1200i.

i'm listening to every suggestions biggrin.gif

Thanks wink.gif
post #6602 of 14765
So still working on my OC but are these temp differences between the cores normal? This was from a slandered Intel Burn test run.
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post #6603 of 14765
Idle doesnt really mean much. As you can see under load you have a 9c difference between the cores, that's normal.
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post #6604 of 14765
Quote:
Originally Posted by axiumone View Post

Idle doesnt really mean much. As you can see under load you have a 9c difference between the cores, that's normal.

Ya that's what I was thinking, I noticed the same results with my old 3770k but it was care 2 and 3 that became hotter, I thought maybe that my heat sink might not be perfectly seated since the temps get lower in the higher # cores. Thanks for the input.
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post #6605 of 14765
Quote:
Originally Posted by tistou77 View Post

To have the pcie 3.0 with IB-E (default) must have a GTX780 or higher
It is because of Nvidia drivers

No worries with AMD
Quote:
Originally Posted by Dr Mad View Post

Hello here,

I think I have a problem related to the RIVBE in SLI mode.
I'm running 4930K (4500), strap 125 / memory 2333 C9 and 2 780ti in SLI (flashed with Skyn3t bios).

So for example, in 3Dmark13, I get approx' 13800/13900 graphic points with one card.
In SLI, I get 25600.

I tested each card and both give the same results in single mode.

My Ti are from EVGA, step-up from two 780 Classified.
When I was running these 2 cards on a Rampage IV Extreme (with same CPU and ram at same clocks), I got 12700 in single mode and 24780 in SLI (1350 on GPU).
In that case, scaling is really good : almost 95%

But for the 780 Ti SLI, scaling is really lower than expected, 85%

Is there an explanation? I noticed that a few other R4BE users have lower scores in 3D.
A friend of mine running EVGA Dark has a good scaling with 2 780 Ti (95%).

Upping some voltages doesn't change anything (I upped vccsa a bit since it handle PCI-E lanes on the CPU), 150% to CPU Current Cap, etc.

The OS is the same as when I was running 780 Classified on the R4E, it's clean and no useless programs running when I'm running 3D benches.

Only things that have changed are the motherboards and GPU's (tried older nvidia drivers, same thing). I use a Corsair AX1200i.

i'm listening to every suggestions biggrin.gif

Thanks wink.gif
sounds like driver optimization. the same that people always accuse amd of, which ironically all components have on both sides
Quote:
Originally Posted by CyBorg807 View Post

Quote:
Originally Posted by axiumone View Post

Idle doesnt really mean much. As you can see under load you have a 9c difference between the cores, that's normal.

Ya that's what I was thinking, I noticed the same results with my old 3770k but it was care 2 and 3 that became hotter, I thought maybe that my heat sink might not be perfectly seated since the temps get lower in the higher # cores. Thanks for the input.

they read the actual temp on the cores, and you will never see a intel with al core the same temps, no way to make all cores read the same as they all have minor variances between them so they each handle power differently
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post #6606 of 14765
So what's the average everyone is getting for OCs with these chips? I have only been at it for about a day and I know I can only get 4.5Ghz with 1.4V or lower which was the recommended safe voltage on the ROG forums. I am running a 4930K with 4x4GB sticks of 2400MHz CL9 ram, prime 95 failed after about 4 hours at 4.6GHz and 1.4V everything else set to auto.
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post #6607 of 14765
Quote:
Originally Posted by CyBorg807 View Post

So what's the average everyone is getting for OCs with these chips? I have only been at it for about a day and I know I can only get 4.5Ghz with 1.4V or lower which was the recommended safe voltage on the ROG forums. I am running a 4930K with 4x4GB sticks of 2400MHz CL9 ram, prime 95 failed after about 4 hours at 4.6GHz and 1.4V everything else set to auto.

Try lowering VCCSA and VTT, might help. Might not, too. 4.5 GHz is decent, not the best, but not the worst, either. I have one 4.3 and one 4.2 chip, then one that I 4.5 @ 1.25V with.
post #6608 of 14765
Quote:
Originally Posted by cadaveca View Post

Try lowering VCCSA and VTT, might help. Might not, too. 4.5 GHz is decent, not the best, but not the worst, either. I have one 4.3 and one 4.2 chip, then one that I 4.5 @ 1.25V with.

Ya Guess I will work on it over the next couple days and see what I can get out of it., A little disappointing since I was able to get 4.6GHz with my 3770K at 1.3V but I guess it could be worse, I could just return it and try another attempt at the silicon lottery if I really wanted to. What is the clock per clock single core performance vs a regular ivy bridge chip anyway with Ivy-E?
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post #6609 of 14765
Quote:
Originally Posted by CyBorg807 View Post

Ya Guess I will work on it over the next couple days and see what I can get out of it., A little disappointing since I was able to get 4.6GHz with my 3770K at 1.3V but I guess it could be worse, I could just return it and try another attempt at the silicon lottery if I really wanted to. What is the clock per clock single core performance vs a regular ivy bridge chip anyway with Ivy-E?

They are pretty equal, but with the added BCLK and memory ability, when you get a great chip, IVB-E is better.

Haswell itself is still faster for most users, if you do not take advantage of the cores, due to faster cache (roughly 200GB/s difference between chips).

4.6 GHz @ 1.3V is OK, but not great for IVB. Some chips will do 5 GHz @ that voltage.

Haswell, 4.6 GHz @ 1.3 V is GREAT.


So you can see, IVB-E is somewhere beyond that...4.6 GHz @ 1.4V is GREAT. I had been binning for good chips using 1.35V for 4.7 GHz, and some will do better than that...I can run 4.7 GHz, but heavy loading is too much for my cooling. GIven that these chips are nearly twice as large physically compared to IVB, I think the lower clock is fine..is only a couple 100 MHz, anyway.
post #6610 of 14765
I'm running 4.7ghz @ 1.36v with LLC at high 24/7 with all energy savings enabled. 4.8 is dooable at around 1.42v and this is where my wall starts frown.gif
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