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Greetings<br />
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I have an sapphire x1800gto and i've discovered that when i overclock the gpu i can go to 612 mhz stable at 1.2 v (74º C on the gpu, 4 hours of atitool with no artifacts). When i overclock the memory i can go to almost 700 mhz @ 2.1 v (495 mhz stock) (i didn't try further). If i put the two of them together (gpu + mem), both atitool and ati tray tools go crazy finding artifacts after a few seconds. It seems my PSU can't handle much... Right now i've to work at 560/612 core/mem @ stock voltages and it seems to be stable (2 hours of atitool scan) .. However ATT still artifacts after 1000 - 1100 seconds.<br />
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Could it really be the PSU? I find it strange...550 w and 34 amp in the +12 rail (+12v1=16 amp ; +12v2=18 amp), should do more than enough... The gpu is cooled by an zalman vf700 cu.. so taking the temperature away it only leaves the PSU..right?<br />
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Anyway acording to my mobo monitor the +12v rail stays between 11.980 (idle) and 11.750 (running a 3d program)...<br />
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What do you think? Thanks!
 

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Well it could be your PSU, it does seem pretty cheap<img src="/images/smilies/frown.gif" border="0" alt="" title="Frown" class="inlineimg" /><br />
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But if your a bit short on money to upgrade right now heres what i would do with the card, have you tried "Find max core/memory" in ATI tool?<br />
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Also try finding the max on the core and then overclocking the memory to suit, or try the other way round.<br />
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Try upping the core and memory together 3% at a time eg:<br />
400/500 + 3% = 412/515<br />
412/515 + 3% = 424/530 etc etc<br />
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Or try 5% at a time if your feeling impaitient lol.
 
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