The 295 is basically two 280s but with a lower GPU clock. The SLI certainly helps of course, but it rapidly falls appart
for newer titles and higher resolutions at 'modern' levels. See my
results. Older cards & combos like that work best
for older DX9/DX10 games at lesser resolutions. I too play comparatively older games, but I like to max out all the
detail options, etc. Although you could certainly use a 295 for such tasks, it's a bit power hungry, and often noisy;
also, remember that for older titles at lesser resolutions, in many cases the CPU can hold back performance, though
often the frame rates are so high it doesn't matter (eg. Stalker COP at 1280x1024). It varies massively by title
however, eg. a good 280 is surprisingly similar to a GTX 460 at HD res for Stalker, whereas for FC2 a 460 is 2X faster.
The main downside of the 280 and related cards is lack of DX11, and of course the lesser RAM, though that should
be less of a problem for older games. I bought 512MB and 1GB versions of 8800GT, 9800GT, 4870, etc. to test this,
and three 700MHz 280s for SLI configs. Sometimes the averages are ok with less RAM, but the minimums suffer,
and SLI/CF doesn't work so well.
Personally though, if on a budget, I'd buy a used 460, 560 or 560 Ti instead of a 280 or 295; quieter, less power, more
reliable (sorry to say 295s don't have that good a reputation for reliability), DX11 support and more RAM (plenty of 2GB
cards around). If power was less of an issue, even 580s come into play, if one can find a model with a better cooler
(reference 580s are too loud I found), though the 460/560 variants are more reliable.
So yes, one could use a 295 for BF3 at HD medium, but I wouldn't recommend it to a friend. Strange thing btw, the
faster 560 Ti is usually cheaper than a 460 on eBay.
Ian.