Gtx 280 fan qwery

[setter]

I ran furmark on my xfx 280 gtx earlier, (640mhz core model) clocks at stock, the temp displayed on experttool was 66'c, using the default auto fan setting, the fan doesnt seem to increase in speed. I had the same issue with 3dm06, with the following clocks.

core, 671
mem, 1251
shaders, 1452

Auto fan speed didnt increase and the bench run failed on the second graphics test. Set the fan to 100% and it passed fine. Also when playing cod4 the card temp hits 70+ degrees, again no increase in auto speed. Appreciate any advice on this

 

[Sean_UK]

Auto tends not to ramp fan speed up till over 80/85c. Messed about with five stock 280's and two stock 285's so far, with minor overclocks there seems to be a wall of about 75c before possible bench test failure, taking things to the edge it's more like 62 to 65c.

With 75% fan, keep the shader at 1458 with memory at 1200, and slowly work the core up to 702, if stable then try shader at 1512.

 

[setter]

Auto tends not to ramp fan speed up till over 80/85c. Messed about with five stock 280's and two stock 285's so far, with minor overclocks there seems to be a wall of about 75c before possible bench test failure, taking things to the edge it's more like 62 to 65c.

With 75% fan, keep the shader at 1458 with memory at 1200, and slowly work the core up to 702, if stable then try shader at 1512.

Ran 3dm06 with the following settings,

Core, 701mhz
mem, 1200 mhz
Shaders, 1452 mhz

Passed fine with no artefacts. Ran it again with core at 701, mem, 1200, and upped the shaders to 1512, passed the tests ok with a slight bit of screen tearing on the last 2 graphics tests, used 75% fan setting on the first run but knocked it upto 100% on the second. Score of 19388

http://service.futuremark.com/compare?3dm06=9961627

 

[Sean_UK]

If 1251 memory is stable with the rest then bit of a result.

Try about 713 then 729 core, irrc 740'ish is about tops on air unless your very lucky, or play around with volts. Compared to the one's I've overclocked; best managed with stock 280 was 730'ish/1512/1275'ish and iirc was Asus branded. My Gainward 280 for 24/7 sits at 713/1458/1224 with 68% fan. The two stock 285's managed something silly on the shader, 740'ish was all i could get out of the cores. Have a BFG 285 OCX version awaiting install as part of a fresh build this weekend, should be interesting.

 

[setter]

Will try it tomorrow with,

core, 701
mem, 1251
shaders at 1512

On the previous 2 runs i left the memory at stock 1200mhz, if that passes ok ill start and up the core 5mhz at a time and see how it goes, thanks for the advice.

 

[jrodga2k5]

Keeping my fan on Auto on my BFG OC 280 iv managed to pull the card up to 709Mhz core 1451Mhz shader and 1251 mem, cant push the shader much higher than that at the risk of corruption!

I think the shader seems to be the limiting factor for some of the cards and 1451 seems to be around the sweet spot for most so I would suggest stay there and try to push a bit higher to see what your max is.

I am going to push the core a bit more tomorrow as I think the memory is hitting its limit too.

 

[Duran]

i used nvidia system tools to overclock but after i increased the clocks and put the profile to load on windows start my fan doesnt auto adjust itself when the temperatures rise. any solution to this problem? if i remove nvidia system tools the fan functions normally again.