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AMD Radeon 6990 Club - Page 150

post #1491 of 4103
Quote:
Originally Posted by cq842000 View Post
Unfortunately, the CPU is holding these cards back at 4.2ghz. I'm still waiting on the new EK HF Supreme revision 2 block to get here, after that I'd be glad to post some benchmarks. Not only that but it looks like software hasnt quite hit even ground with the 6990, as my old hd 5970 quadfire rig is outscoring this setup. On the bright side, these cards are running ice cold, and the sweet spot for my GPU memory seems to be 1500mhz.
How do you know the CPU is holding you back? Also, are you running 3 or 6 sticks of DDR3?
     
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post #1492 of 4103
Quote:
Originally Posted by ezveedub View Post
How do you know the CPU is holding you back? Also, are you running 3 or 6 sticks of DDR3?
6 DIMMs/12gb...as for how I can tell, I clocked it up to 4.6ghz, and it made an appreciable difference in the GPU score (above the margin for error), the problem is it isnt cold enough for that OC yet. Hopefully the new waterblock will offset the need for lower ambient (it's advertised to employ better cooling and 50% higher flow rate than my current CPU block). I suspect that the software is a little behind, when an older quadfire setup is smoking a newer one with more VRAM and faster VRAM at that, and better efficiency/scaling. So if all else fails, I may have to wait a couple of driver versions.
Edited by cq842000 - 5/2/11 at 4:51pm
    
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post #1493 of 4103
Quote:
Originally Posted by cq842000 View Post
6 DIMMs/12gb...as for how I can tell, I clocked it up to 4.6ghz, and it made an appreciable difference in the GPU score (above the margin for error), the problem is it isnt cold enough for that OC yet. Hopefully the new waterblock will offset the need for lower ambient (it's advertised to employ better cooling and 50% higher flow rate than my current CPU block). I suspect that the software is a little behind, when an older quadfire setup is smoking a newer one with more VRAM and faster VRAM at that, and better efficiency/scaling. So if all else fails, I may have to wait a couple of driver versions.
Yank out 3 sticks of DDR3 and recheck/try your OC again and see what you get. Running dual sticks per channel stresses the CPU more than singles.
     
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post #1494 of 4103
Quote:
Originally Posted by ezveedub View Post
Yank out 3 sticks of DDR3 and recheck/try your OC again and see what you get. Running dual sticks per channel stresses the CPU more than singles.
Already ran it with 6GB/3 DIMMS. Made a small difference in voltage threshold, but not enough to keep the voltage requirement down as the temps climb. I hold my reservations, but I suspect that there need to be software optimizations for quadfire. I'll confirm with a run of 3dmark 11, knowing that AMD have at least focused a little on this benchmark, I should see better scores than my previous rig.
Edited by cq842000 - 5/2/11 at 5:39pm
    
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post #1495 of 4103
Thread Starter 
I get a GPU score of 22450 with my Quad-Fire set-up with 3D Mark 11. So you know what you should aim for. ''Normal'' (not 6.4GHz 990x...) Quad-SLI set-ups with i7 2600K near 5.0 are also between 20-22K usually.

    
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post #1496 of 4103
P16,602 overall, 20k GPU score with lower CPU clocks than your's.
Attachment 208604
Compare

I need to get that cpu waterblock...
    
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post #1497 of 4103
what waterblocks are you all using? just the ek waterblock? i need copper on my block and ek only has the nickel...
Tiny Powerhouse
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Tiny Powerhouse
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post #1498 of 4103
Quote:
Originally Posted by fshizl View Post
what waterblocks are you all using? just the ek waterblock? i need copper on my block and ek only has the nickel...
EK FC 6990 Nickel/Acetal here....
    
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post #1499 of 4103
Quote:
Originally Posted by fshizl View Post
what waterblocks are you all using? just the ek waterblock? i need copper on my block and ek only has the nickel...
You mean you want a bare copper waterblock? The EK is copper with Nickel plate just as the Koolance.
     
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TSH663B DVD burner EK Supreme HF XSPC RC360 XSPC DDC Reservoir 
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EK-FC6990 - EN (Nickel) Windows 10 64bit Pro Gateway FHX2300 Logitech MK320 Wireless Desktop Keyboard  
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Intel Core i7 860 P7P55D-E PRO AMD Radeon HD 6900 Series AMD Radeon HD 6900 Series 
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G. G. Kingston 120Gb SSD Seagate SATA Barracuda 160GB 
Optical DriveCoolingCoolingCooling
TSH663B DVD burner EK Supreme HF XSPC RC360 XSPC DDC Reservoir 
CoolingOSMonitorKeyboard
EK-FC6990 - EN (Nickel) Windows 10 64bit Pro Gateway FHX2300 Logitech MK320 Wireless Desktop Keyboard  
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PC Power & Cooling Silencer 750 Quad Cooler Master HAF 932 Logitech MK320 Wireless Desktop Mouse  Creative 5.1 
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post #1500 of 4103
Quote:
Originally Posted by fshizl View Post
what waterblocks are you all using? just the ek waterblock? i need copper on my block and ek only has the nickel...
Well if you want Copper http://www.dangerden.com/store/dd-69...l?&cat=47#tabs
I think im going to give the Danger Den block a go, Because it's nice and simple
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