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Help overclocking Zotec 8800GT - Page 2

post #11 of 18
Those memory IC's should be able to hit 1,000mhz (2ghz effective) assuming you have enough voltage.

It seems to me that many card manufacturers that are using the reference design aren't providing enough voltage to allow for an increase in performance. While things may stay stable enough to allow you to use your rig normally once the extra power is needed there just isn't enough left. I suppose you could say that it's similar to vdroop.

That's my hunch anyway because there are too many people that are talking about how their scores are dropping when their clocks increase.

I wonder...could it have anything to do with the 2 phase setup on the reference design? Some of the manufacturer's in house designs, namely the Galaxy aka KFA2 have a 3 phase setup.

Also the problem may be with your power supply. EZCool isn't exactly a major player in the power supply market and juding by the price they aren't built well. You get what you pay for. Consider a step up since you'll probably need one in the future. You don't want to skimp on this component like so many others do.
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post #12 of 18
Thread Starter 
Hey all thanks for the inputs, I only want to try stock voltages for now. and also i have the non AMP! edition, mines the standard one.

So far ive got the core upto 738 stable, i put the core up one more notch and it was ok but once i moved the shader, the display driver stopped responding. So ive took that down and ive found my shader to be stable at 1728, im trying ram now.

And yes im using riva tuner for changing clocks, the graphs to see the actual values and im using ati tool to look for artifacts.

Temps are lower now because ive opened my window so its not so warm in here. 68C max.

Ill report back once ive done the ram.
post #13 of 18
I am still overclocking mine atm (started this morning)
so far.....700 core 1750 shader 1000mhz memory, but I can't get the 3dmark score, keeps on saying submission fail =(
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post #14 of 18
Thread Starter 
Hey all thanks for the inputs, I only want to try stock voltages for now. and also i have the non AMP! edition, mines the standard one.

So far ive got the core upto 738 stable, i put the core up one more notch and it was ok but once i moved the shader, the display driver stopped responding. So ive took that down and ive found my shader to be stable at 1728, im trying ram now.

And yes im using riva tuner for changing clocks, the graphs to see the actual values and im using ati tool to look for artifacts.

Temps are lower now because ive opened my window so its not so warm in here. 68C max.

Ill report back once ive done the ram.
post #15 of 18
You won't be able to mess with the voltage of your card unless you do a hardware modification or flash the BIOS using NiBitor, both of which I don't recommend since you're new to overclocking. Both will void your warranty and possibly brick your card so that shiny new 8800GT may be an expensive, smoking paper weight.

I simply meant that I'm wondering if the manufacturers are providing the board with enough voltage to get a suitable overclock.
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post #16 of 18
Thread Starter 
Ok i think im at my peak for stock voltage. Ive got...

Core: 738mhz
Shader: 1728mhz
Memory: 1068mhz

And ive got a 3dMark06 of: 11256.

Are these good results for this system? I might be able to get further but i dont want to try manual volt modding and i dont know anything about the bios flashing mod.

Thanks for the help guys.
post #17 of 18
Thread Starter 
Ok, ive found something in my MB bios which says 'Bandwidth Boost' or something like that, it says that it increases the vga bandwidth to increase performance. Would this help with overclocking, as in would it make it more stable or allow me to go further? Ill try it soon, i just dont know if its going to damage my card.

post #18 of 18
I've got the AMP! edition of the Zotac and it runs fine on crysis and cod4 with max settings at 1260x780. Hitting about 16.5k on the 3d06 with my overclock to 3.2 albeit with temps at around 60c max load (cpu) that is. I bought the amp edition cause it was only $25 more here in Japan when I got my new system and i thought "why not since I'm paying over 275 for a video card anyways...) If you want, I'll run some diagnostics and tell you how and what the card is doing, give me a shout and we'll figure out your overclock....
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