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5850/70 cards + stock cooler + no 100% fan when turning computer on?

Last response: in Graphics & Displays
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February 3, 2010 9:47:13 AM

Does Radeon 5850/5870 cards with stock cooler have this similar kind of feature than my 4870 that it spins it´s radial fan for couple of seconds when I turn computer on? If yes, can it be disabled by BIOS tweak or something else? Or is the only solution to buy aftermarket cooler or buy card with non-reference cooler like Vapor-x?
February 3, 2010 9:54:09 AM

My 5850 did 100% fan speed the first time, but after i had installed the drivers it was fine.
Now the fan does rev up at start up, but only for a 1 second and not at 100%, more like 40%, Not really that noticable.

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February 3, 2010 10:38:25 AM
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My 5870 also spins up to around 35-40% for a second or two on initial startup.
As soon as it hits Windows, it drops to around 20%.

The highest I have ever made it to go is 40%.
That was during a FurMark run for overclock testing.
During actual gaming, I rarely go over 35%.
This cooler is actually pretty quiet for how good it cools.
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February 3, 2010 11:12:53 AM

Yeah its a great cooler, I set mine to 32% for gaming and have never seen temps above 60C
February 3, 2010 11:17:36 AM

I got it to go as far as 87° while testing at 930/1330, fan set to auto.
The fan will be chugging along at 35ish% until 87° comes along, then jumps to 40% until the till it is below 85%.
With the fan set to auto and running at 900/1300, my temps max out in the mid 70's while gaming.
February 3, 2010 11:52:22 AM

Nice OC and good temps for such a low fan speed : )

I'm impressed with the stock cooler, Even does a good job at cooling the VRM's

I was testing my cards limits the other day and managed to get to 925/1130 with stock voltage, using 42% fan speed temps stayed below 60C under ATi tools. Dont see a need to replace the stock cooler.
February 3, 2010 11:59:24 AM

Rustyy117 said:
My 5850 did 100% fan speed the first time, but after i had installed the drivers it was fine.
Now the fan does rev up at start up, but only for a 1 second and not at 100%, more like 40%, Not really that noticable.



Same with my 5870
February 3, 2010 2:52:27 PM

@Outlw

Careful with a 4x1330 memory setting there. You might have pushed it too far... The GDDR5 in the 58xx cards has error correction, so if you go too fast w/ it, it doesn't cause issues, it just degrades performance. That's why most high end overclocks you see, with folks with 1GHz cores, still have the memory set between 1170 and 1260.

February 3, 2010 3:13:34 PM

Yeah, I noticed that while I was playing around with the OC.
Scaled it back to 900/1300 and it seems to be working fine.
At 1330 it would occasionally dog out, figured something like that was going on ;) 

TBH, these cards don't really need the extra memory bandwidth.
Plenty to go around.
February 3, 2010 3:24:58 PM

I find the 100% fan speed burst on start-up almost reassurring. If I didn't hear it I would probably panic, lol.
February 10, 2010 5:06:45 AM

Best answer selected by turmas.
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