Spare parts - 7800GS or 2600XT

[toadly]

Hi,
After some time poking around, I am still unclear on this. I have 2 spare videocards from old systems:

BFG GeForce 7800GS OC (256MB, Model: BFGR78256GSOC)
http://www.bfgtech.com/bfgr78256gsoc.aspx
Visiontek 2600XT (512MB, Model: 2600X512AGP)
http://www.visiontek.com/products/cards/retail/2600XT_AGP_512.html

Ultimately the card of choice will end up in the following system:

Asus P4P800
Pentium 4 2.4
2GB DDR400

Primarily I want to use the system as a secondary gaming system. Games played:

COD4
Black & White 2
Oblivion
World of Warcraft
Grid
Spore (eventually)

I've seen the chart/list on tom's indicating that these 2 cards are on the same "tier" but I'm still curious as to which card will perform better, or if it's going to be a complete toss up depending on which games I am playing. Unfortunately, I have been unable to find any benchmarks with both of these cards included.

As a side note, I am running WindowsXP on this machine, but strongly considering Vista.

Any advice?

 

[dagger]

2600XT should be a little faster than 7800GS and a little slower than 7900GS. 2600XT also support DX10, so between those two, use it instead of the 7800gs.

 

[hesskia]

Doesn't the 2600XT have hardware decoding of HD streams? It is definately the wiser choice of the two.

 

[beejay82]

The 2600XT supports DX10 and has 256MB more than the GeForce 7800GS. With just the added memory, the ATI card should work alot smoother on games.

 

[dirtmountain]

I'd stay with XP, may have trouble with Vista on older components