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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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Anonymous
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

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
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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.
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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.
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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
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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.

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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.
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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.
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Anonymous
February 10, 2010 5:06:45 AM

Best answer selected by turmas.
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