7770/7750 crossfire vs 7850/560

[ramish]

guys i'm thinking of crossfiring 7770 or 7750 how will they perform against the one and only 7850 and the great one 560<non-ti>

note: my psu is antec vp-450

 

[jessterman21]

Should match or beat them. But most would advise getting a stronger single-card to avoid the hassles of XfireX. (Microstuttering, game compatibility, driver support)

 

[de5_Roy]

you need a good cpu (dual core not advised), good mobo with at least two pcie x16 slots for cfx/sli, a strong psu to run two cards. vp450 is an entry level psu better suited for a single card setup.
it's not a good idea to start with entry level cfx/sli combo. better to go with single powerful card in the begining and if budget permits, add one more down the road.
iirc 7750 cfx would perform close to single 7850 (check tweaktown.com benchmarks). 7850 outperforms gtx 560.

 

[sarinaide]

Two 7770's basically sit somewhere between a 7850 and 7870 performance, not designed to be strong cards.

 

[ramish]

you need a good cpu (dual core not advised), good mobo with at least two pcie x16 slots for cfx/sli, a strong psu to run two cards. vp450 is an entry level psu better suited for a single card setup.
it's not a good idea to start with entry level cfx/sli combo. better to go with single powerful card in the begining and if budget permits, add one more down the road.
iirc 7750 cfx would perform close to single 7850 (check tweaktown.com benchmarks). 7850 outperforms gtx 560.

iam getting an i5 also btw how much performance will i lose if chosen 560 over 7850 and is sparkle gtx 560 any good

 

[de5_Roy]

an i5 will put more pressure on a vp 450, even more if/when overclocked.
here's techpowerup's performance summary of gtx 560 256 bit (msi twinfrozr ii)
http://www.techpowerup.com/reviews/MSI/GTX_560_Twin_Frozr_II_OC/27.html
and of radeon hd 7850 (reference card)
http://www.techpowerup.com/reviews/AMD/HD_7850_HD_7870/26.html
they used the same test setup. difference is in driver version - 7850 uses newer catalyst drivers.
which 560 did you mean? there is a 192 bit and a 256 bit version.

 

[ramish]

so in final should i get a single 7770 or 560 non ti non se 7850 is out of stock for a while in my local shops