tl;dr
My 5870 oc's faster, the 560 ti is close in power but has 2gb vram. For current games (bf3, skyrim+mods, crysis 3) which is the better option, and which would be more "future proof". 1080P resolution
As the titles suggests I am trying to figure out which is the better option of two video cards I have
Links to my exact cards:
http://www.amd.com/us/products/desktop/graphics/ati-radeon-h…
http://www.msi.com/product/vga/N560GTX-Ti-Twin-Frozr-II-2GD5…
Some background info:
The 5870 overclocks like a champion. So far I have found that 940core/1300mem @ 1.175v is pretty stable(haven't had time to test extensively though). I'm hoping to be able to ramp that voltage up to push out somewhere between 950-1000mhz and any extra bump I can get on the mem speed.
The 560ti is absolute poo for overclocking. Changing the volts does nothing to help oc and I can pretty much only get 930 out of the core maybe 1100 out of the memory if I remember correctly. Regardless, this "stable" overclock gets completely trashed by Far Cry 3 so I've decided to just leave it stock for now. Apparently that's the trade-off for the 2gb models as the 1gb ones apparently overclock quite well.
From the benchmarks I've looked up so far, the 560 ti takes the lead of the 5870 by about 1-5 frames generally. Though all these are stock cards (potentially reference ones?).
The 560 ti does have the extra 1gb vram over the 5870 and this is where I start to get hesitant on which one to go with. Obviously the 5870 smashes it for raw power with higher clocks and memory bandwidth, but it is an older generation with poorer optimisation, drivers etc. Regardless of drivers, I believe it is the "better" card and from the brief gameply I had of BF3 and Crysis 3, I'm pretty sure it performs better than my 560ti. But how important a role does the v-ram play?
All my gaming includes the most torturing titles - crysis series, BF3, the witcher 2 and they all seem to dive deep into the over-1gb territory (frequently 1.5gb mem usage). On top of that I play Skyrim a lot and throw a fair few mods at it, so the vram gets filled up fast from that.
I'm trying to stretch out my aging rig until DDR4 comes out and prices are reasonable to do a complete upgrade, so I want the card I choose to be the better option for games now, and also new titles between say now and ~April next year. I'm guessing vram hungry titles are the future, so my biggest concern is that if I go with the faster, smaller card now, I'll regret it later when it gets bottle-necked by it's lack of memory.
Specs:
1080P resolution
Q6600 @ 3.33ghz
4gb DDR2 ram @ 740mhz - due to FSB strapping
GA-p35-DS3 mobo
Antec Eco Neo 520C PSU
Of worthy note is that I've got a pretty crappy and storage HDD where my steam folder resides (currently). Pretty sure it's some 5400 RPM 2tb, so when new assets get loaded into the vram, things do get pretty stuttery :p. Just cant fit it all on my 120gb ssd
post @ whirlpool = better