I have used 7 79's in total, 2-70's and 5-50's:
7970 WF, silent@idle, aggressive when it hits 60c, medium clocker@1150MHz but developed a fault and got returned.
His Ice-Q 7950 bought when it first launched, annoying grating noise@idle, not bad on the noise under load, rear venting too-tremendous clocker@1200MHz+ but was returned as I'm anal about noise.
MSI 7970 OC another tremendous clocker@1200MHz+/1850MHz+ on the memory but died out of the blue-gutted but full refund as OcUK don't stock them any more-seriously bad noise levels though but it was sat on top of the fantastic AC Extreme.
XFX 7950 running in CrossFireX with the above 7970, seriously cheap@£200 inc Never Settle bundle-Flawed cooler, poor clocker@1100MHz max voltage through Trixx(meant to be voltage locked), it found a new home with a friend.
Read that the grating noise was dealt with on the Ice-Q's so I got another, it's a monster clocker@1250MHz/1650MHz His iTurbo full core/vram voltage support-this one didn't have the grating problem, His has sorted it out.
MSI TFIII bought on the cheap here on offer, no diode issue, fan worked as it should, 1170MHz/1600MHz+(stopped pushing the vram as it doesn't need to go that far, could go further on the vram I imagine), but at the time, AB didn't apply voltage even though AB reports it as applied.
Trixx came to the rescue again, but no vram voltage option-yet(upcoming newer Trixx is supposed to have vram voltage adjustment support).
I wasn't happy with the TFIII/Ice-Q combination as it ended up having to rely on two seperate oc tools to apply voltage on both, so I caved in and went with my gut and took delivery of yet another Ice-Q and got another brute of a clocker.
That's three Iv'e had now that oc past 1200MHz on the core probably down to the high 1.25v boost bios(the vram needs a touch more to get it going past 1500MHz though), the 7950's don't all get to 1200MHz with such ease though.
Highest stable clocks in CrossFire are 1240/1650MHz, but it doesn't need that and happily sits @1100/1400MHz 24/7 on stock voltages(which was the same clocks my 7970/7950 CrossFireX were sitting with zero visible difference in gaming on 120Hz Frame Sequential 3D.
For
gaming@1080p, although the 7970 was fantastic and I was very happy with it, the price difference you pay is only noticeable from your wallets pov.
If it runs on a 70, it runs just as good on a 50 when they are both oc'ed, the only way I would say go 70 is for high res gaming or bench marking-where the little extra oomph(the vram clocks considerably higher due to higher grade chips, so at least there's some justification) will see you good.
My recommendation can only be:
YOUR BASKET
1 x
HIS HD 7950 IceQ BOOST 3072MB GDDR5 PCI-Express Graphics Card (H795QC3G2M) £239.99
