Originally posted by: akshayt
Also, difference between 6800GT and Ultra can't be of 21 and 29FPS in most of the cases.
I said in most current games going beyond playable will result in 6800Ultra getting something like 29 framerates while 6800GT will get 21 framerates, both resulting in unplayable gameplay. You don't think that's a reasonable statement?
From Tom's VGA Charts:
1. HL2: episode 1 - 1600x1200 4AA/8AF
6800U = 29
6800GT = 26
2. Hard Truck Apocalypse = 1600x1200 4AA in game AF
6800U = 24
6800GT = 21
3. Oblivion - 1600x1200 no AA
6800U = 33
6800GT = 28
4. Prey - 1600x1200 4AA/8AF
6800U = 24
6800GT = 21
5. Rise of Nations - 1024x768, no AA
6800U = 28
6800GT = 25
6. Titan Quest - 1024x768 no AA
6800U = 17
6800GT = 16
So in summary, the numbers I provided even favoured the 6800Ultra. It turns out that 6800Ultra has even lower performance advantage over 6800GT. Back when games were not as intensive, we often saw 20%+ performance advantage. Now, if 6800Ultra has 20% advantage, it still makes the same settings unplayble, thus mitigating such an advantage.
6800Ultra's core runs more than 20% faster, which can't be said about X1900xt 256mb vs. x1950xtx. So the only thing X1950xtx has going for it is extra ram and higher memory speed, which has been shown to give 5-7% performance advantage on average. Therefore, imo it is not worth it to pay 130 pounds for double the memory considering by the time games that take advantage of 512mb come out, X1950xtx will be just as slow as the 256mb variant of that card.
EDIT: Benches of BF2142 show that 512mb bring no serious performance advantage in any of the playable settings.
512 vs. 256 on X1900XT series