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Author Topic: xfx 5870 fan numbers  (Read 1511 times)
QuantumFoam
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May 12, 2012, 02:39:36 AM
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I just got a used xfx 5870 today and am looking for some benchmark numbers to see if everything checks out with the fan/heatsink mounting.

It seems to heat up pretty fast, running 900/300 it holds 62C @ 74% fan which corresponds to ~3380rpm. The low rpm figure concerned me at first but I realize that the fan is a different design on this card vs the reference 5870s I have. I suspect the rpms will be lower in general due to higher cfm on this 80mm fan, but I could be wrong. What are normal rpm figures for this design at 75%? My reference 5870s all run 950/300 under 65% fan speed without overheating issues, so I suspect there's either an airflow issue or the thermal pads aren't all making good contact. At least it is lifetime warrantied so I can send it in if there's any serious problem.
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May 12, 2012, 03:12:22 AM
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Which XFX model do you have?  I have two different XFX 5870s, and they are very different.  I run them both at 50% fan or lower, and they run in the low 60s, sometimes in the 50s depending on ambient temp.  They are in an "outside" rig with a box fan blowing on them though.

I just got a used xfx 5870 today and am looking for some benchmark numbers to see if everything checks out with the fan/heatsink mounting.

It seems to heat up pretty fast, running 900/300 it holds 62C @ 74% fan which corresponds to ~3380rpm. The low rpm figure concerned me at first but I realize that the fan is a different design on this card vs the reference 5870s I have. I suspect the rpms will be lower in general due to higher cfm on this 80mm fan, but I could be wrong. What are normal rpm figures for this design at 75%? My reference 5870s all run 950/300 under 65% fan speed without overheating issues, so I suspect there's either an airflow issue or the thermal pads aren't all making good contact. At least it's lifetime warrantied so I can send it in if there's any serious problem.

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May 12, 2012, 03:22:37 AM
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I have the version with the fan in the center of the card, HD-587X-ZNFC. I don't have the "black edition" which follows the reference design, a squirrel cage style fan at the end of the card. As far as I know those are the only two types of 5870 models from xfx.
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May 12, 2012, 05:55:07 PM
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mdude, what are your ambient temps in the outdoor rig? I've been able to gather more information on the card now, overnight it ran ok but ambient temps where the rig is were in the 40s-50s F, so that's to be expected. Today is our first warm day in a long time, ambient temp is 74F at the mining rig and the 5870 in question has had to throttle back to a 790 clock speed to maintain 62C at 75% fan. Two of my reference 5870s are still chugging along at 950mhz, with fan speeds of 65% and 49%, and gpu temps of 62C. I am wondering if overheating is a known issue with this model of card (HD-587X-ZNFC). Will try another airflow improvement to see if that helps any, but suspect this might be a heatsink/possible warranty issue.
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May 14, 2012, 12:23:40 AM
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mdude, what are your ambient temps in the outdoor rig? I've been able to gather more information on the card now, overnight it ran ok but ambient temps where the rig is were in the 40s-50s F, so that's to be expected. Today is our first warm day in a long time, ambient temp is 74F at the mining rig and the 5870 in question has had to throttle back to a 790 clock speed to maintain 62C at 75% fan. Two of my reference 5870s are still chugging along at 950mhz, with fan speeds of 65% and 49%, and gpu temps of 62C. I am wondering if overheating is a known issue with this model of card (HD-587X-ZNFC). Will try another airflow improvement to see if that helps any, but suspect this might be a heatsink/possible warranty issue.

I don't have a thermometer down there, so I don't know the ambient temp.  I can tell you the % fan rate is different than the others.  It runs automatically in the 60%s or so to stay in the 60Cs, where as the others are 40-50.  The RPM is different too, can't compare them.  I run at 900/300 stock voltage.

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