Overclocking a hd4850

avedei

Distinguished
Jan 14, 2009
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18,510
Hi guys!i just bought a palit hd4850 gold edition(625/993)
i have a amd cpu a 5200+ brisbane at 3.11(13.5x230),3x1gb kingston 800mhz,a gigabyte mobo(ga-ma69gm-s2h),two HDD 1xsataI 1xsataII and a no-name psu at 400w(2x12v rail at 20A).
I want to oc my card but couldnt get past 665/1030!I know that all cards oc different but after removing one of my hdd i got to 671/1132 w/o artifacts...ran a stability test with furmark(1440x900 2xmsaa) and max temp was 63 degrees.after an hour of gta4 ran the test again artefacts...reduced mem at 1070...stil artefacts...1030..stable!i looked up something on the web...about 20 min...tried again....reached 1170 no artefacts...then increased the gpu to 700mhz...vpu recover error...reduced it...got artefacts...after 3 minutes of furmark!
The funny thing i guess its that i think its the psu...because when running stability test it gets somewhat hot!
First i thought it was from voltages...so flashed the bios...but still no decent results...so what should i do?am i right about the psu?
 

avedei

Distinguished
Jan 14, 2009
4
0
18,510
i cannot edit the message...using rivatuner to oc...using catalyst drivers 8.10 and i noticed that when starting furmark stability test my cpu fan loses 200rpms