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Poor performance from PCI graphics card

Last response: in Graphics & Displays
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July 7, 2010 1:43:22 AM

Hi,

I have a dell vostro 200 slim desktop, with a 8600GT card. That woks fine and runs my main display and my LCD TV. I wanted to run a 3rd display 1280x1024 monitor which I could use for watching videos on while working so I wouldn't have to turn on my 50inch LCD TV.

I tried using the on-board graphics together with the 8600GT but the o-nboard graphics get disabled with the PCI-E 8600GT plugged in. So I bought a PCI 8400GS 512MB graphics card. From what I have seen that is the most up to date PCI graphics card available however the performance is terrible, scrolling down a web page displays bad redraw and the same goes for video especially full screen.

The drivers that are installed are the same that are installed for the 8600GT.

I don't want to messa round with changing too much if it's going to be in vein and that I must just accept that PCIx1 is just really slow. I'm just not too sure though why the performance could be so bad.

Help and suggestions needed.
Many thanks,
H.
a c 189 U Graphics card
July 7, 2010 6:26:03 AM

PCI is a really slow card, plus you're running it with 3 monitors, that's a hard job...
a b U Graphics card
July 7, 2010 3:13:51 PM

+1

Consider also that it's a Dell computer with vista.

How old is the computer ?
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a b U Graphics card
July 7, 2010 3:50:04 PM

PCI GPU's are ancient; frankly, your performance for that GPU sounds about right.
a b U Graphics card
July 7, 2010 4:31:27 PM

pci is really slow with a capacity of 533MB/s
but pcie 1.x has a bandwith capacity of 4GB/s
you can just imagin how slow it is...
July 7, 2010 4:50:28 PM

wa1 said:
PCI is a really slow card, plus you're running it with 3 monitors, that's a hard job...


My PCI-E 8600GT powers 2 monitors and the PCI 8400GS powers one monitor.
July 7, 2010 5:09:15 PM

dextermat said:
+1

Consider also that it's a Dell computer with vista.

How old is the computer ?



It's a dell vostro 200 (about 3 years old)
Intel E4400 running at 2.66GHz per core
5GB RAM 667MHz FSB

As I mentioned in my first post even just scrolling down a web page, the redraw is quite apparent.
July 7, 2010 5:11:01 PM

Oh, and I'm running Windows 7.
July 7, 2010 5:12:47 PM

Yay, I remembered my old account details.

hatski = hatimh.
July 7, 2010 5:39:03 PM

try running just the PCI card and see what performance you get out of it by itself with 1 monitor. I suspect you have way to much going on for the processor and its choking on it. The cards are comparable in performance the 8400gs actually has a higher fill rate, but the bus handicaps it. You are shooting for the moon with a submarine.....
July 8, 2010 12:42:30 PM

I just tried your suggestion and it still runs badly. It must be down to the drivers being good for the PCI-E 8600GT but bad for the PCI 8400GS.

Can I run my onboard graphics card and my PCI-E 8600GT together> The on-board seems to get disabled when I plug in a graphics card.
!