kanecvr wrote on 2015-12-21, 06:08:
If you do get a 6800 card use forceware 66.93. Anything else seems to break compatibility with one game or another. Also you need to make sure of two very critical things:
1. Your motherboard has a AGP 4X slot. i810/i815 and Via Apollo PRO 133A have that. Some later 440bx revisions might but I wouldn't bet on it. The 6800 REFUSES to work on AGP2x (system freeze, BSODs, the works).
2. Make sure you get an EARLY 6800 card w/o the PCI-E to AGP bridge, it's the only one that supports 3.3v signaling. If you get a later model and stick it into a P3 board you will fry both card and motherboard.
Hello. Sorry for necroing old thread, but I need to react, as this was not disproved later in discussion, and it's very important.
You will not fry the 6800 card in Pentium III board. Because, there is no 0.8V-only graphic card in reality. Every late AGP card that is AGP 8x, can run AGP 4x also, and knows 1.5V and 0.8V signaling. So when you put it into old Pentium III AGP 4x board (i815, Via Apollo 133A), it will just run in 1.5V AGP 4x mode. You cannot put it into BX chipset, or any older chipset with AGP 2x, because it physically doesn't fit in, if it's AGP 8x card. It will have only one cut in AGP port, that fits only late 1.5v AGP slots or Universal slots (they know 3.3V and 1.5V signaling)
It will not have mark on AGP slot for old AGP 2x slot. You would need to cut hole into AGP slot of the card, to put it into AGP 2x 3.3v only slot.
The only danger is on some weird motherboards, they used Universal AGP slot , because the probably had only those physicaly, while motherboard was not AGP 4x and didnt know 1.5V signaling. In this case, you will fry it, but it's the fault of motherboard maker, that made motherboard wrong way, and used improper AGP slot and soldered it into motherboard. In manual it needs to be stated, if it knows both 1.5V and 3.3V signaling, only then it's real Universal AGP slot (this is really bad practice by motherboard manufacturer btw, when they did it, luckily, it was very rare). Same goes, if they use Universal AGP slot on motherboard, while it is AGP 2x only (3.3v). If you put 1.5v or 0.8v AGP 8x card only, you will fry it too. But again, if motherboard manufacturer doesnt use Universal AGP slot where it should not be, and as far as I know, decent companies never did it, you cannot fry AGP card in AGP slot. It eighter won't fit in, or run properly, when you can put it in. Only exception is, when motherboard manufacturer make AGP slot wrong way (Use Universal AGP slot, while it's not and should be used 1.5V only or 3.3v only slot)
More of it here:
http://www.playtool.com/pages/agpcompat/agp.h … sal15vagp30card