the X300 and X600 from what i've read are the 9200 and 9600 on PCIE (basically, not as simple as that, but basically the same idea)
the X700 is based on R4xx (Radeon X800 and X850) so it would be another option
you have to have a PCIE slot to have a PCIE graphics card
and you have to have an AGP slot to have an AGP graphics card
dagger idk why you continually suggest the 9200SE
but it's really a waste of money
John Robie has found an excellent price on the FX 5200 @ $45, which would be a FAR BETTER deal than the 9200SE for your "$30 or under"
the cheapest 9200SE on newegg is just @ $30
most are $40 to $50 or more
and for that money you can get a 9550 which is a much better idea
the 9200SE is the slowest "current" generation video card avliable
it's pathetic
the card is a cut down version of a card that already has issues with most current games
basically the 9200SE is put out for the "extreme value" segment
but with the recent release of the 9550 (which would be WAY faster) and even the 9250's the 9200SE is just a terrible option
the card is not included in any of Tom's Hardware's video charts (not in VGA III, IV or V (V is PCIE cards btw))
the 9200SE is not DirectX 9 capable
while you can play DX9 games, they are running in DX 8.1 shaders and grahpics
so not only can it not play games quickly, or well, it cannot even go so far as the FX 5200's ability to play DX 9 games in DX 9 graphics, but just very slowly (if you crank the settings, it'll look great, but you'll get about 1 FPS)
9200SE can play no DirectX 9 game in DirectX 9 graphics
Radeon 9250 or better can play any Direct X 9 game in Direct X 9 graphics (but most will be dog slow, with exception of 9600 and above, the 9550 is a cut down 9600, it's between the 9600SE and 9600np)
GeForce FX can play any DirectX 9 game with DirectX 9 graphics, with the exception of Half-Life 2 (which is heavily biased towards ATi, for example it forces GeForce 6 series cards to run it in SM 3.0/FP32 just to slow them down, while Radeon X are put to SM 2.0/FP24 (their max) to give them a performance edge...HL2 is biased to ATi...)
and of course GeForce 6/Radeon X700 or above can play any game with ease (exceptions being 3dfx Glide, which is unplayable on all ATi or nVidia cards, but don't worry, Glide hasn't been used for about 6 years, and i don't see it ever coming back...ever)
GeForce 6 supports a better shader model, and a larger z-buffer which will give it an advantage in games to come (FP32/SM3.0 vs FP24/SM2.0b....Radeon X is behind the times)
i'd suggest a PCIE 6600nU for around $105 over the 6200, unless $100 is your absoulte cap
and i'd have to agree with john robbie on the 6600GT
for $170-$190
you can't beat it