New graphics card is not recognized

Ati Firepro v4800 100505606 workstation...
January 10, 2011 at 16:41:54
Specs: Windows XP SP3, 3.2Ghz/2GB
I'm trying to upgrade my existing ATI graphics card with a better one. I'm running XP Home, SP3 on an older machine I built myself. 3.2Ghz processor, 2GB RAM on an Intel D915PBL mobo, that has a PCI-Express 16 X slot. I got a good deal on an ATI FirePro 3D V4800 graphics card that's PCI Express 2.0. I thought PCI-E 2.0 cards were backward compatible with PCI-E 1.0 slots. So put the new driver on the desktop, then shut down physically swapped cards and powered up. Nothin'. No BIOS, the power light on the monitor was still blinking. I shut down, then put the old card back in, started up and installed the new drivers thinking that with the new drivers already inplace it might see the card. Nope.

So what, if anything, can I do? Or am I just trying to put too new a card in too old a machine? Any advice would be greatly appreciated for this enthusiastic amature. Thanks in advance for your help!

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January 10, 2011 at 17:26:15
Usually the cards are backwards compatible like you said but not all. The specs on the FirePro does say it requires PCI Express 2.0x16.

It could be the power supply issue too. What do you have? It says 350 watt or greater. I'd expect you to have more though.

Sorry couldn't help more.

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January 10, 2011 at 18:11:10
Yup, that's probably what it is. The PSU should be OK, it's 500 watt.

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January 10, 2011 at 21:28:22
I've had the same problem with newer ATI cards (a Radeon 5750 would not work at all on my PCIe 1.0a NF4 SLI board; but an even newer GeForce GTX 460 PCIe 2.0 card works just fine).

Return it and go nVidia.

Socket 939 | Dual-core Opteron 185 @ 3.2GHz | 4GB | 1.0TB | Win7 x64
GeForce GTX 460 1GB | X-Fi Ti Pro | A8N32-SLI Deluxe | Antec P182

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