At OP's resolution, I don't see a game that would go from unplayable to playable with the side-grade.
Sorry, just isn't worth it to me based on available data.
In fairness, can you please try to be a little more objective with regard to OP's setup?
- Using outdated average benchmarks with outdated drivers - check
- Using all resolutions instead of directly linking OP's resolution - check
- Ignoring that OP bought 7970GE edition, not a standard 925mhz 7970 - check
- Ignoring that 7970 OC beats 580 OC by 40-50% on average - check
- Ignoring that OP's 580s had 1.5GB of VRAM which is a bottleneck in many games and his new cards have 3GB of VRAM - check
- Ignoring that his
$440 7970GE CF is
39% faster in BF4 and is beating $700 GTX780Ti
OC.
- Ignoring that his
$440 7970GE CF/7990 is providing performance similar to GTX780Ti OC for a lot less $.
- Ignoring that Mantle should speed up BF4 performance by another 15-20%; if not, since the OP bought his cards for only $220, he can sell them easily without much loss in value, if any.
$440 for 7970GE in CF is a smoking value right now considering that
a single GTX770 2-4GB is $320-$390. Also, the Vapor-Xs can overclock to 1150-1200mhz. In 12 months from now, the OP can sell each of those 7970GEs for $130, or a loss of value of $180 on both. This is not a lot given the amount of power he'll have in the next 12 months.
So 90 to 100+ FPS is meaningful? lol.
You are reading the wrong data. Stock HD7970GE/7990 trades blows with an overclocked $700 GTX780TI.
How about $1000 GTX780 OC is just 17% faster than $440 HD7970GE in BF4? Ouch!
There isn't a single setup right now that even comes close to the price/performance of 7970GE CF for $440.