Ati 7950 $399.
Ati 7950 is close to the performance of X2 6950;
And can OC better. 20~30% over clocking has been reported on air.
Ati 6950 can only overclock 10% or so.
ATi 7970 utilizes 28nm technology. Also to note the crossfire mode
only gets a 60%~70% performance boost
not completely 100%. So this single card should out perform your cross fire.
And ati 7970 would do even better.
But the Ati 7950 is cheaper then two ati 6950.http://ncix.com/products/?sku=62238&vpn=HD695XZDFC&manufacture=XFX
$239.99 Ati 6950 X2 = $479.98
So its almost $100 cheaper and you could get a less powerful PSU. A 650~750 Crossfire power supply
could handle two ati 7950. So that would save even more.
My suggestion would save you over $150?
Also you don't need a three slotted motherboard but that's up to you.
Intel is better at the extreme end. But Amd wins at price/performance.CPU Comparison chart
(Tested over 350,000 CPU) -At extreme $1000 End intel is top.
If you are rich. Then the top intel is for you.Cpu value chart: http://www.cpubenchmark.net/cpu.php?cpu=AMD+FX-8150+Eight-Core
Its higher then Intel 2500K. Wins in price/performance
AMD Bulldozer FX-8150 8 Core Processor 3.6GHZ Socket AM3+ 125W Retail Box
performance: AMD FX-8150 Eight-Core (Score: 8,260)Price: $280.98http://ncix.com/products/?sku=57962&vpn=BX80623I52500K&manufacture=Intel
Intel Core i5 2500K Quad Core Unlocked Processor LGA1155 3.3GHZ Sandy Bridge 6MB
Intel Core i5-2500 @ 3.30GHz (Score: 6,598)Price: $239.98
Cpu Price difference: $239.98>$280.98
But better performance.Review Build Suggestion
-Double Cpu cores.
-25% Faster performance
($154.10) > ($92.99). Nearly 60% cheaper!
Ati 6950 X2 = ($479.98) > ($399). Nearly 25% cheaper
$80.98+$61.11+$50(Cheaper Psu) -40.99(Better CPU)Summary (Buy Instead)
-AMD Bulldozer FX-8150 8 Core Processor 3.6GHZ Socket AM3+ 125W Retail BoxCpu: http://ncix.com/products/?sku=64404
-ASUS F1A75-M mATX FM1 DDR3 AMD A75 2PCI-E16 1PCI-E1 1PCI USB3.0 SATA3 HDMI DVI GBLAN Motherboard Motherboard: http://ncix.com/products/?sku=62524&vpn=F1A75-M&manufacture=ASUS&promoid=1205
-Antec Earthwatts 750W Modular Power Supply ATX12V V2.2 EPS12V Active PFC 80PLUS 135mm FanPower Supply: http://ncix.com/products/?sku=38107&vpn=EA750&manufacture=Antec&promoid=1211
-HIS Radeon HD 7950 800MHZ 3GB 5.0GBPS GDDR5 2xDVI HDMI 2XDISPLAYPORT PCI-E Video CardVideo Card: http://ncix.com/products/?sku=67951&vpn=H795F3G2M&manufacture=HIS&promoid=1211(Return other things, cancel order almost all places is fine with a cancel and trade of parts,
usually no fee. That's if you want to do this build.)
You save: $151.1Cpu: 20-30% performance
Videocard: 10% better
Power efficiency: 15~25% better(less electric bills)