GPU OCing Help Thread

[Otis11]

Ok, so this is going to be continually under construction, but i decided we needed a GPU OCing help thread (as the title suggests) to compile as much knowledge as we can about how to get the most out of our cards. So here it goes, please feel free to add/make suggestions to this:


Notes Before Starting:

For GPUGrid, shaders have the largest impact on points. Core makes no difference. Dedicated crunchers can actually drop the core freq. to keep temps down. Doing so may impact gaming performance though. Effects of memory speeds have not been determined, but are slight at best.

Although graphics cards (105C) tend to be rated higher than CPUs (with some exceptions - 70C), we recommend bumping up the fan speed also. These chips were designed for high temps, but not to hold those temps 24/7. (IMO - Temps below 80C are acceptable, but opinions vary)

As long as Temps are kept in check, hardware longevity should not be an issue.

GPUGrid Stable OCs:
(please give these a week to let your RAC settle and make sure it is stable. Also, please note 24/7 or not)
I believe all 200 series should work at 685/1477/1160 and most should work at 702/1512/1188

Numbers after card are PPD Stock/Strong Overclock

GT 240:15.7k/20.1k
550/1340/1700- WhiteFireDragon
.......... OS: Win 7.......... Brand: Galaxy.......... Cooling: Stock fan @ 40% .......... Voltage: Stock .......... Temp: 58C
405/1595/1701- WhiteFireDragon
.......... OS: Win XP.......... Brand: EVGA.......... Cooling: Stock fan @ 85% .......... Voltage: Stock .......... Temp: 67C

GTS 250:??k/??k

GTX 260(216):??k/34k

626/1350/1053 - Otis11
.......... OS: Win 7.......... Brand: EVGA .......... Cooling: Stock fan@40% .......... Voltage: Stock .......... Temp: ???
666/1436/1107 - Otis11
.......... OS: Win 7.......... Brand: EVGA .......... Cooling: Stock fan@40% .......... Voltage: Stock .......... Temp: ???
576/1512/999- CaptMorgan
.......... OS: ????.......... Brand: EVGA .......... Cooling: ??? .......... Voltage: Stock .......... Temp: ???
702/1512/1188 - Otis11
.......... OS: Win 7.......... Brand: EVGA .......... Cooling: Stock fan@40% .......... Voltage: Stock .......... Temp: 62C

GTX 275:34.7k/42.0k
648/1458/1188- WhiteFireDragon
.......... OS: Win 7.......... Brand: EVGA.......... Cooling: Stock fan @ 40% .......... Voltage: Stock .......... Temp: 71C
705/1566/1220 - HuffPCair
.......... OS: ????.......... Brand: BFG.......... Cooling: Stock fan@75% .......... Voltage: Stock .......... Temp: 68C
633/1620/1134 - mreuter80
.......... OS: ????.......... Brand: EVGA .......... Cooling: Stock fan@50% .......... Voltage: Stock .......... Temp: 60-70
468/1620/1134- WhiteFireDragon
.......... OS: Win XP.......... Brand: EVGA.......... Cooling: Stock fan @ 80% .......... Voltage: Stock .......... Temp: 69C
485/1656/1152 - Kryja
..........OS : Win XP32.......... Brand: BFG.......... Cooling: Stock fan @ 65% .......... Voltage: Stock .......... Temp: 70
576/1656/1188 - SMTB1963
..........OS : ???.......... Brand: ???.......... Cooling: ??? .......... Voltage: ???.......... Temp: 70

GTX 280:??k/??k

GTX 285:??k/??k
651/1532/1244 - CaptMorgan
.......... Brand: EVGA .......... Cooling: Stock fan@70% .......... Voltage: Stock .......... Temp: 61

GTX 295:??k/??k
701/1577/1233 - Mabyboi
.......... Brand: EVGA.......... Cooling: Swiftech Epsilon waterblock.......... Voltage: Stock .......... Temp: 42
717/1600/1233 - Mabyboi
.......... Brand: EVGA.......... Cooling: Swiftech Epsilon waterblock.......... Voltage: Stock .......... Temp: ???
725/1600/1300 - Mabyboi
.......... Brand: EVGA.......... Cooling: Swiftech Epsilon waterblock.......... Voltage: Stock .......... Temp: ???



Scale for G200b: (to assist in OCing step by step)

1242-1271=1242
1272-1315=1296
1316-1342=1332
1343-1364=1350
1365-1385=1368
1386-1423=1404
1424-1451=1440
1452-1467=1458
1468-1494=1476
1495-1532=1512
1533-1559=1548
1560-1576=1566
1577-1603=1584
1604-1641=1620
1642-1668=1656
1669-1685=1674
1686-1712=1692
1713-1750=1728
1751-1772=1764
1773-1791=1782
1792-1817=1800
1818-1854=1836
1855-1880=1872
1881-1899=1890
1900-1925=1908
1926-????=1944

- Thanks SnowCrash




GTX 460:30k/??k
800/1600/1800 - PoppaGeek.......... 30k
.......... OS: Vista 64.......... Brand: MSI 1gig DDR.......... Cooling: Stock fan @ 59% .......... Voltage: Stock .......... Temp: 48C (25.5C room)
828/1656/1566 - SMTB1963 .......... 34-36K ppd
.......... OS: ???.......... Brand: ???.......... Cooling: ??? .......... Voltage: ???.......... Temp: 60

GTX 465:??k/??k

GTX 470:??k/??k

GTX 480:??k/??k
???/1712/????- SnowCrash.......... Stable
.......... Brand: ????.......... Cooling: Stock.......... Voltage: 1138mv.......... Temp: ???



GTX 560:??k/??k

GTX 570:??k/??k
842/1684/1652- SMTB1963 .......... Stable
.......... Brand: ???.......... Cooling: ???.......... Voltage: ???.......... Temp: 65

GTX 580:??k/??k



Tools:
Voltage Tuner Thread - Thanks Ikiller123
EVGA Precision
RivaTuner
CUDA mem test - Thanks PG