R7800 Fan Sounds Sick

Djinn

New member
Yeah, I'm not kidding here. The card has two fans. When operating at low speeds, one fan is working smoothly and silently. The other one sits idle for about five seconds, and then spins slowly for two seconds, while making a noise like a sick cow. Then it's silent for another five seconds.

I cleaned the fan with compressed air; no effect.

When I force the fans to operate at higher speeds, it seems to alleviate the problem... at least, I can't see it slowing down every few seconds.

See and hear it for yourself... The fan blade are visible just above the "R7800."

Any idea if this is something I can easily service? The card is a little old, but other than this fan issue, it's working fine, and I'd rather not replace it.

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Sounds like the bearing is going out on it.

Edit: if you are willing to paypal me $13, Ill ship you a 7950 for free to replace it.
 
I'd say it's almost certainly the bearings going. It sounds like the increased resistance is causing the fan to stall at low speeds. At higher speeds when it has more juice it can overcome the increased resistance and still spin, albeit slower than it otherwise would.

If it still works at high speeds then you could just ignore it. Cooling might be somewhat impaired, but it will probably still work, although the fan will entirely fail at some point. Replacing it would probably be tricky as graphics cards don't generally take off the shelf fans.
 
Many thanks for the info, all. Even the bad news that repairing it myself isn't a viable option.

Omega53 - not to look a gift horse in the mouth, but why are you offloading a 7950 for free? I'm absolutely interested... Given that my current system is old, it's likely to bottleneck anything much faster than the 7950.
 
Many thanks for the info, all. Even the bad news that repairing it myself isn't a viable option.

Omega53 - not to look a gift horse in the mouth, but why are you offloading a 7950 for free? I'm absolutely interested... Given that my current system is old, it's likely to bottleneck anything much faster than the 7950.

I figure enough Ragers have looked out for me in the past, just giving forward. PM you address so I can send it. It works 100% with no issues.
 
On the topic of handing off hardware, if you don't need the 7800 series card now that it's being replaced by Omega's 7950, I have a friend who's running on a 6850 that could squeeze out whatever life is left in the card.

If you're willing to part with it, I'll pay for the shipping. :)
 
On the topic of handing off hardware, if you don't need the 7800 series card now that it's being replaced by Omega's 7950, I have a friend who's running on a 6850 that could squeeze out whatever life is left in the card.

If you're willing to part with it, I'll pay for the shipping. :)

Not a problem - though I'd like to wait until the new card is safely installed. You're sure your friend wants a piece of hardware with a dodgy cooling fan?
 
what's an xfx r7800 couldn't find anything on google for that model, I know that the Double Dissipation hd7870/7850 were lifetime though and think the black edition is lifetime too
 
Not a problem - though I'd like to wait until the new card is safely installed. You're sure your friend wants a piece of hardware with a dodgy cooling fan?

No problem on waiting.

I'm thinking that maybe you can put a slot cooler above it to make up for the fan not working, or depending on the size of the fan, the fan from the 6850 itself may be able to be swapped out for it (I'll have to see how hard it is to remove the fan).

Anyway, no pressure, if you'd rather just keep the card, that's fine. I just figured if you were going to toss it anyway, I might as well see about getting it running for my friend's comp. He's obviously not too much of a gamer or he'd have something newer than my old 6850. :lol:
 
R7800 Fan Sounds Sick

Hmmm... Ran into a hitch with the new card's power connectors:

Old card:
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New card:
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My old card took power from two 2x3 PCI connectors. The new card appears to take power from one PCI, and a mystery 2x4 socket. I found a 2x4 plug labeled "CPU" but hole shapes are wrong.

I could theoretically* plug both of the 2x3 PCI plugs into the card - but I want an expert opinion first.


* Not really "theoretical." The two 2x3 plugs fit - I just didn't power it up.
 
On 2nd thought, you might just want to upgrade your psu or get an adapter
 
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Hold it... I just noticed that some of the six-pin connectors have a 2-pin "add-on" ... I think we're good...
 
So far so good... Seemed a little wonky at first, but I re-installed the latest drivers from ATI, and everything cleaned up nicely. Witcher 3 ran without problems, running a little stress testing before declaring it a success.

Nagorak - Sending you a PM.
 
So far so good... Seemed a little wonky at first, but I re-installed the latest drivers from ATI, and everything cleaned up nicely. Witcher 3 ran without problems, running a little stress testing before declaring it a success.

Nagorak - Sending you a PM.

Time to update your rig stats ;)
 
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