New vid card, no AGP, CPU 70%+

Gigabyte / Gv-r465d2-1gl
September 18, 2009 at 17:29:16
Specs: Windows XP Pro
Little Help?

OS: Windows XP Pro, build 2600 SP3
Mobo: Gigabyte GA-K8NSC-939
BIOS: Award Modular BIOS v6.00PG
Processor: AMD Athlon(tm) 64 Processor 3000+, MMX, 3DNow, ~1.8GHz
Memory: 2048MB RAM

Summary: Old AGP vid card went bad, replaced with the ATI Radeon 4600 AGP.

Updated ATI drivers and mobo drivers.

Set AGP to 8x in ATI Catalyst, reboot, sets itself back to nada.

Set BIOS to auto-detect AGP speed, nope. Set BIOS to 8x AGP, reboot, nope.

No errors detected in DXDIAG.

Odd thing is that since installing the new AGP card, my CPU Usage stays in the 70% to 80% range AT IDLE. It seems like the mobo and vidcard are fighting each each other.....

What gives?

See More: New vid card, no AGP, CPU 70%+

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September 18, 2009 at 17:31:14
Before you installed the new video card, did you uninstall the old video card and drivers in the device manager? Also, did you uninstall any of the software associated with the old video card - prior to installing the new card?

Jarvis -Technician

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September 18, 2009 at 17:44:41

I removed the old card (PNY GeForce6600) first (I only have 1 AGP slot on this mobo).

I removed the NVIDIA drivers AFTER I stuck the new card in using the "Add or remove windows components" app in the Control Panel.

The Control Panel app was the only thing I used to remove any old vidcard software.

I didn't remove the drivers first because I didnt know if I would be able to see anything at all once I did that... bad idea, perhaps?

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September 18, 2009 at 22:52:15
"It seems like the mobo and vidcard are fighting each each other....."

That's EXACTLY what's happening. The high cpu usage is caused by hardware interrupts. I had the same problem when I installed an AGP HD 3650 on a P3 system.

The only way out of it is to install an alternative driver, as ATI's driver just won't drive the new AGP cards. It's been a while since I last used that machine; I'll have to take a look at the driver it's running.

Another CN member had a similar problem with his AGP HD 2400 yesterday. Makes you wonder why ATI won't support AGP users. Apparently, the Plain-old-PCI Radeon HD cards work fine.

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Related Solutions

September 18, 2009 at 23:02:23
Alright, the P3 machine is actually running an Omega driver. Performance is great, and CPU usage at the desktop never goes above 0%.

It doesn't look like OmegaDrivers has an HD 4000 driver out yet, but the HD 3K driver will probably work.

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September 20, 2009 at 12:15:39
Thanks so much for the reply, Jackbomb!

Its been a busy weekend here so I had to put PC troubleshooting on the back burner for a few days.

I will try to locate an alternative driver, starting with your Omega site.

Not too many folks show concern about AGP since everyone is moving to PCI-e. My mobo wont support any of the PCI-e cards, so I was forced to look for the best AGP deal I could find.

Not enough bang in the budget for a mobo replacement right now.

Again, thanks for the reply, I will see where this takes me!


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