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post #611 of 4099
that's a pretty heavy OC


how much are u trying to overclock the 7850
post #612 of 4099
Quote:
Originally Posted by DeadLink View Post

SO..... Sadly my SB 4.5ghz clock on a 2600k and any OC on my 7850 sapphire OC locks up the PC. And now I am getting driver crashing errors. I may need to invest in a better Corsair 650watt PSU. I just dont think it is taking the heat for some reason. I get on Kumbustor roughly 2280's at stock OC settings. Anyone care to chime in please?

What methods do you use for overclocking ?
What PSU do you have atm ?
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post #613 of 4099
Quote:
Originally Posted by DChat View Post

No problem. My card didn't respond well to the Power Control but maybe yours does so keep an eye on what effect is has on your GPU overclock when you reduce %'s.

Hi DChat, when i reduced % to "0" i can passed 3DMark11. But my score is reduced too. I just got arround 69xx frown.gif I'll try to bench in stock then i'll post here some result...
post #614 of 4099
Quote:
Originally Posted by Formula44 View Post

Hi DChat, when i reduced % to "0" i can passed 3DMark11. But my score is reduced too. I just got arround 69xx frown.gif I'll try to bench in stock then i'll post here some result...

Ouch.. so it "stables" your OC but score is reduced.. I had the same thing when my GPU-Core voltage was set to maxx (1.165V) in GPU-Tweak. It drastically reduced my scores.. so for a quick benchmark run I was satisfied with a 1330Mhz GPU, but soon reduced the voltage to 1.150V for the stability and scores.

Maybe you still need to find your sweetspot?

Possibly, run the same OC at 5%, 10% and 15% Power Control.. see what that does.
Edited by DChat - 4/19/12 at 9:43am
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post #615 of 4099
Quote:
Originally Posted by Farih View Post

What methods do you use for overclocking ?
What PSU do you have atm ?

Its an Antec True power 650. I thought it was the Corsair I had but I swapped them at some point.

CCC for the first time.
MSI 2.1.0 the second.

Overclocks were. 1050/1450 both times.
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post #616 of 4099
Quote:
Originally Posted by DChat View Post

Yeah, Power Control only broke the stability of my card.. even on stock settings. So I set it to 0% and enjoyed stability and OC'ing afterwards.

Hmmm I just ran 1200/1450 with def voltage and power control slider set to 0% in 3DMark Vantage and result is the same score I got just like when I set power control slider to max 20% ... But if I overclock it with add voltage such as 1300/1450 with 1.30volt then with slider max 20% it shows better score than slider 0% approximately 400poin in GPU score Vantage.
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post #617 of 4099
Quote:
Originally Posted by neoroy View Post

Hmmm I just ran 1200/1450 with def voltage and power control slider set to 0% in 3DMark Vantage and result is the same score I got just like when I set power control slider to max 20% ... But if I overclock it with add voltage such as 1300/1450 with 1.30volt then with slider max 20% it shows better score than slider 0% approximately 400poin in GPU score Vantage.

Looks like your card responds well to Power Control then, and probably needs it at higher clocks/voltages thumb.gif
Have you tried testing 10% and 15% while at 1300/1450@1.30V ? I imagine there should be a sweetspot, maybe 20% is just that.

But that's about the only thing I can think of that makes any influence... besides any related bios setting's. Like "PCIe Spread Spectrum" ect...
Edited by DChat - 4/19/12 at 11:06am
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post #618 of 4099
Quote:
Originally Posted by DChat View Post

Looks like your card responds well to Power Control then, and probably needs it at higher clocks/voltages thumb.gif
Have you tried testing 10% and 15% while at 1300/1450@1.30V ? I imagine there should be a sweetspot, maybe 20% is just that.
But that's about the only thing I can think of that makes any influence... besides any related bios setting's. Like "PCIe Spread Spectrum" ect...

Thx DChat wink.gif but later I will test it with other benchmark like 3DMark2011. Only I think 400 poin difference is not to big, maybe its not make different at all with power control slider?? I mean the difference (I think) should be larger like 2000poin in GPU score Vantage.
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post #619 of 4099
Quote:
Originally Posted by neoroy View Post

Thx DChat wink.gif but later I will test it with other benchmark like 3DMark2011. Only I think 400 poin difference is not to big, maybe its not make different at all with power control slider?? I mean the difference (I think) should be larger like 2000poin in GPU score Vantage.

True... You could be correct smile.gif
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post #620 of 4099
Quote:
Originally Posted by DeadLink View Post

Its an Antec True power 650. I thought it was the Corsair I had but I swapped them at some point.
CCC for the first time.
MSI 2.1.0 the second.
Overclocks were. 1050/1450 both times.

It should give no problems to 1050/1450mhz really
Try 1050/1350, sometimes memory can be a bit iffy.
You should be able to do this in catalyst OD.

Use MSI AB 2.20 Beta 14 to overclock beyond Catalyst OD clocks.
Asus GPU Tweak 2.06 works fine to.
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