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Old September 12, 2013, 06:41 PM
Fudd Rucker's Avatar
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Default PhysX card troubles

Hi

Recently added an 9800 GT to my rig for PhysX calc (card was free so why not). But im getting an odd quirk with the card added and setting the 9800 to dedicated PhysX. My system comes to a grinding halt even before boot. CPU usage is @ 85- 100% all the time even doing a menial task like idling with taskman running. Pulling the PhysX card out results in system being as snappy and stable as it usually is.

Rig is:

i7 860 @ 4ghz (stable)
32gb Corsair Dominator 1600
P55-UD4P
TT TR2 600w psu (1200w psu currently on RMA)
H100 cooler
GTX 680 2gb
9800 GT 512mb
1 crucial 64gb ssd
500gb WD blue

Now my experience has taught me if I was having psu issues, I should be getting shutdowns or gpu crash errors (due to lack of power). Ive checked the rails, everything seems to be kosher, 5v rail is down a little bit. But instead the cpu ramps up to full load (temps aren't an issue either) and the cpu isn't throttling and downclocking either.

Any suggestions?
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Old September 12, 2013, 06:46 PM
enaberif's Avatar
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Those power supplies are junk and could easily be your problem. Especially with that 680.

That power is probably at max good for 450-500w.
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Old September 12, 2013, 07:03 PM
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Let the single 680 take care of Physx, that 9800 is ancient n will not handle Physx (even dedicated), as well as just letting the 680 take care of it.
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Old September 12, 2013, 07:24 PM
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Question are you using the SLi link on the 9800 ? if are remove it, should only have power an if second moniter hooked to the card

rjBarker is right 9800 is weak and by the sounds of it has issues

also what driver version using for PhysX ?
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Old September 16, 2013, 11:15 AM
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Test the 9800 by itself and see if your computer boots to desktop/runs games. That will tell you right away whether the 9800GT runs good and if it is some other problem.
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Old September 16, 2013, 07:07 PM
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Discovered its an odd quirk with my mobo. When I got it working finally, some odd reason my mobo was running my 680 @ x4 and my 9800gt @ x8. Put the 9800 gt in the top slot, and the 680 in the bottom slot. Both cards working @ x8 speeds, cpu isn't ramping up to 100% just idling. Its definitely noticeable in Planetside 2(explosions and smoke are spectacular) and Arkham Origins. Thinkin about getting a 650 ti to go with my 680s in sli. Ive been doing some reading, and apparently if the PhysX card is too low end it bottlenecks the setup since its waiting for PhysX calc to be done.
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Old September 17, 2013, 06:40 AM
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You're resolution is probably at 1920x1200 and that GTX 680 should handle physx without a problem. If I were you,I would get another GTX 680 and FOR SURE have no problems. You can find 680's at pretty good prices probably right here at HC.
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Old September 17, 2013, 07:52 AM
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I would pull the 9800 out as well. No need with a 680 in there. Also, I would be a bit worried pulling that kind of power from that PSU. Your call, but its not a very high quality PSU.
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