CGTalk - pci-e M/B's can use old AGP?

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jcbray

11-04-2004, 04:29 AM

I'm just checking some advice i got before I follow through and buy a new graphics card. I was told that a pci-e motherboard would run the older AGP graphics cards - is this right or is the connection different or something?? That was all, thanks people!

- Colin Lynch

lots

11-04-2004, 04:45 AM

No, it wont, unless its got an AGP slot on the board.. too.

jcbray

11-04-2004, 04:59 AM

Hmmm, perhaps he misunderstood me when I asked then. Thanks for the reply, I'll clarify that before long with the shop.

Novakog

11-05-2004, 06:08 AM

He probably meant what lots kinda said: it is possible (and quite a few do) for a motherboard to have both a PCI-E and AGP slot (though they cannot be used at the same time).

Here (http://www.newegg.com/app/ViewProductDesc.asp?description=13-135-157&depa=0) is a link for one such motherboard.

lots

11-05-2004, 02:53 PM

Really.. you only see the AGP slot on PCIe boards in some.. very strange cases, for the most part AGP is left off. The AGP slot on this board is actually a PCI slot with an AGP connector. Hence, ECS calling it "AGP-Express." Meaning 133MB/s at 33MHz. How'd they pull it off? They stuck the equivilent of 2 PCI slots into one, to meet the power requirements and slapped the AGP connector on top. Only a few AGP cards work in this slot. Why not use a full blown AGP slot? Simple. They can't. The chipset does not support AGP. So, ECS devised a way to convert a PCI to AGP. There is a huge performance hit, not to mention that you will not get alot of the features found in AGP. Direct access to system memory for example.

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