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ATI HD58xx Owners Club **OFFICIAL** - Page 294

post #2931 of 3765
My entry needs to be changed from PCS+ 5870 to Crossfire Asus DirectCU 5850s.

A lot of work until this PC is finished, but here's where I'm at now:
    
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post #2932 of 3765
Quote:
Originally Posted by mitchbowman View Post
1* the gpu score you have is excellent for the clocks you are running (the stock voltage is about 1.08 depending on the card)

2*you have to remember that the trick to OC'ing is that you have to find the balance between mem & core clocks (since you cant change voltage) and pushing the mem to far will intern lower you fps and become unstable

3* in GPU-Z the vrm temp is the one labled VDDC Phase #1 ,#2 ,#3 and should never go above 100c but at stock volts should be around 40/45

And for stability testing try FurMark if you run that in 1280x1024 for an hour if it doesn't reset or BSOD your good then move on to crysis (when i OC i always have FurMark running to load the gpu so if it dose artifact i can quickly change back)

I find that if your clocks are to far of it's a wast of time trying to setup crysis for a 2 second run
Hi Mitch,

Appreciate your comments. I read on some threads stating that to have a good OC it's as per what you said....good balance on both core & mem.

I didn't try (yet) to up the mem further but did tried playing BF:BC2 for a couple of hours I think @ 910/1300 at max settings & AA 4x AF 8x & HBAO ON w/out any prob.

Load temp was good @ 61C max with max fan speed of 71%. Encountered some prob reading my crysis cd so I didn't get to install and try it out.

Ran multiple loops of Vantage GPU tests on both Performance and High...all cleared. But I guess most of the time I'll just leave it at stock clocks unless a particular game is demanding.

Nonetheless will try to see how much further (IF) the mem can be pushed. Will post pics once I have everything confirmed.

Cheers!
GTBlackHellZ
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GTBlackHellZ
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post #2933 of 3765
Quote:
Originally Posted by GTBlackIce View Post
Nonetheless will try to see how much further (IF) the mem can be pushed. Will post pics once I have everything confirmed.
Correct me if I'm wrong here, but I think the memory on the 5850 will run WAY past its maximum efficiency. You can keep raising the clocks right up to the max and you'll just take more time to correct the errors, reducing performance. I only crashed during my memory OC one time, and that was trying to run Heaven at 1400mhz.

You aren't going to getq lots of artifacts or crashes from the mem, just diminishing returns.

I had to find the sweet spot by changing the memory, benchmarking, raising it, benchmarking, until the performance dropped, then scaling it back.

I could run Furmark at 900/1400 stock volts, but got steadily better frames as I dialed the memory back down.
    
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post #2934 of 3765
yes, but increasing the memory wont give THAT much of an improvement.

the gpu is where the juice comes from, how high can you up it? i run vantage with 1050/1250 with 1.25v which is low, saw 5850 that run my freqs at 1.35, so im guessing i have room for more... waiting for winter to try over 1100gpu and over 1300 memory...
Dreamy...
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post #2935 of 3765
Quote:
Originally Posted by 495 View Post
yes, but increasing the memory wont give THAT much of an improvement.

the gpu is where the juice comes from,

I am referring to the memory modules ON the 5850 GPU.
    
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CPUMotherboardGraphicsRAM
Phenom II X3 720 @ 3.5 (1.39v) Gigabyte GA-MA790XT-UD4P ASUS 5850 @ 880/1180 (1.118v) 4gb 1333mhz G.Skill DDR3 
Hard DriveHard DriveHard DriveHard Drive
64gb Crucial M4 SSD 3x 250gb WD2500JD - RAID0 1tb WD1001FALS 1tb WD10EARS 
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post #2936 of 3765
Quick question.
945 core 100% stable at 1.125 volts.
Is that good?
What
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What
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post #2937 of 3765
Pair of ASUS 5870's

    
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post #2938 of 3765
Quote:
Originally Posted by L36 View Post
Quick question.
945 core 100% stable at 1.125 volts.
Is that good?
Yup, that's good. Mine does 950 @ 1.162.
M1XN
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post #2939 of 3765
Quote:
Originally Posted by _02 View Post
I am referring to the memory modules ON the 5850 GPU.
that was the memory i was talking about.
Dreamy...
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2x160Gb Wd Sata + 1Tb external WD I don't use one! Windows 7 Benq E2400HD 
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post #2940 of 3765
i think i must be lucky and got a excellent OC'ing 5850

Core: 1000.89
Mem: 1287.50
VCore: 1.187
Grandfather
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Grandfather
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