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-   -   Unstable Video Card (Sapphire HD3870) (http://www.hardwarecanucks.com/forum/video-cards/26828-unstable-video-card-sapphire-hd3870.html)

sloth December 19, 2009 04:08 PM

Unstable Video Card (Sapphire HD3870)
 
Hi guys, I just upgraded my video card to a Sapphire HD3870 and now I cannot do anything that involves 3d.

The card is a hand me down from my little brother (he gets my old clothes, I get his old GPUs). He is a gamer and has been using it for quite a while with no problems at all.

Now that it is in my machine it crashes as soon as anything 3d starts. it idles at 45C and the best 3d I've got it to run is Furmark for 57 seconds in a 640 x 480 window. The temp crept steadily up to 71C and the it crashed.

When it crashes the computer just freezes (colours don't change, nothing goes black, everything just stops) and I hear the fan go crazy (even though the temps reported from furmark seem fine).

I have all the most recent drivers and the card runs ok for regular computer use (internet and the like). On occasion the screen does go black for a couple seconds and then a window appears telling me the device stopped responding and that it has been restarted and everything works fine. A little annoying, a little disconcerting, but nothing that significantly impacts my use.

Does anyone have any idea how to fix this?

Thanks a bunch,

Sloth

PS. Everything else on my system is very stable and runs at decent temps. I run a E8400, 4 gig ram, Windows XP (32-bit) SP3

sswilson December 19, 2009 04:17 PM

Do you have any software that allows you to manually set the fan speed? I've had several older sapphire cards which needed the fanspeed to be set higher than the auto settings.

sloth December 19, 2009 04:44 PM

What would you suggest???

sswilson December 19, 2009 04:53 PM

Riva tuner, or depending on the card you might have the option in ATI's CCC.

Arinoth December 19, 2009 05:05 PM

What is the rest of your system (including and rather importantly your power supply). You could be maxing the load of your power supply and may need a new one.

sloth December 19, 2009 05:07 PM

I've underclocked it to 600 mzh, using the catalyst control centre. After 10 minutes of running furmark at 1280 x 1024 in a window, the temp has stabilized at 79C under full load at an average of 51 fps. The fan is going pretty loud. I guess it is a fan issue on an old card.

Unsatisfactory, but I don't know if there is much else I can do.

Thanks to anybody who gave thought to this.

Sloth

sloth December 19, 2009 05:08 PM

I have a 500W power supply that is a year old. I don't think it is a power issue, but I don't know much about power supplies. Oh, and a P5Q Pro mobo.

sswilson December 19, 2009 06:30 PM

depending on the card, some of the power regulation cct on sapphire cards are strictly to reference, and power supply can greatly affect it (regs can't clean dirty power coming from power supply). you may find that a higher end power supply resolves the issue.

KaosMage December 27, 2009 09:13 AM

well i got a 3870 Sapphire light in my wifes comp and have never had any problems other then it wanting to set up sound from the card (long long story) and there is no fan control speed on that card atleast not in ccc but i was told you can set up a profile and put what fan speed you want on it but that's all i can help out with you should be able to run most anything i play call of duty modern warfare 2 on that rig

jcmaz December 27, 2009 09:58 AM

Quote:

Originally Posted by KaosMage (Post 308387)
well i got a 3870 Sapphire light in my wifes comp and have never had any problems other then it wanting to set up sound from the card (long long story) and there is no fan control speed on that card atleast not in ccc but i was told you can set up a profile and put what fan speed you want on it but that's all i can help out with you should be able to run most anything i play call of duty modern warfare 2 on that rig

Please use paragraphs and spaces and DO NOT bold the whole thing, just the ones you want to highlight.

Rivatuner might help set fan speed. RivaTuner


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