Member Avatar for rational611

Hi,

I have a Celeron 300MHz of 1998. Recently I bought an AGP Card to replace the one in it. But when I installed it, it won't work. I checked the AGP card. It is alright and works when installed in another system. I have no reason to suspect that the slot is bad. Then what could be the reason? Is my old AGP slot obselete and has to be upgraded ? Is it something like that? Do new AGP cards work with old AGP slots?

rational611

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As and suggested, this is most likely an AGP compatibility issue rather than a bad slot. AGP changed signalling voltages as it evolved: early AGP (1.0) used 3.3V and offered 1×/2×, AGP 2.0 moved to 1.5V adding 4×, and AGP 3.0 dropped to 0.8V for 8×. A newer card that expects a different signalling voltage or chipset support simply won’t initialize on an older board. (en.wikipedia.org)

Practical checks to try before buying new parts: visually inspect the card and the slot for the AGP keying/notches (don’t force it); read the motherboard manual to confirm which AGP signalling and transfer rates the board/chipset supports; enter the BIOS and set any “AGP Data Transfer Mode” to the lowest available (1×/2× or 2× instead of 4×) and disable fast-write/sideband options while testing; and look for a BIOS update that mentions AGP fixes. Many older manuals explicitly include an AGP transfer-rate option for backwards compatibility. (notice-facile.com)

If the card still refuses to work after keying, BIOS tweaks and a BIOS update, the chipset probably cannot support the card’s signalling. Universal cards/slots exist, but some boards or vendors were keyed incorrectly and an incompatible fit can prevent operation and, in rare cases, harm components — avoid forcing mismatched hardware. At that point your practical choices are: find a period-correct AGP card that explicitly lists 3.3V/1×–2× compatibility, or upgrade the motherboard/platform. (en.wikipedia.org)

Summary: check keying first, try BIOS AGP-rate changes and a BIOS update, consult the board manual, then decide whether to source an older compatible card or move to a newer platform. Further reading: AGP on Wikipedia, , example ABIT KG7 manual showing AGP BIOS options. (en.wikipedia.org)

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Member Avatar for caperjack

sounds like it is the motherboard/aGP not able to use the newer faster AGP,your old one is most likely 2x and the new one 4x or even 8x .You will need a new board /cpu and ram,to use the new card .

Member Avatar for jabberwock486

yep, sounds like it is just too goold of a card for the board. if it is geforce 4, redeon 9000+ or any other newer card it may not work.
stuff is cheap get a new mainboard and CPU

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