7990 Specs

[xsistor]

Actually those 7990 specs sound very achievable if it's a dual GPU board. If it's not a dual GPU board then you'll need a chip with roughly 2x the area of a 6970 to achieve something similar.

Photolithographic processes are specified on the basis of nanoscale design of MOSFET spacing. ITRS (http://www.itrs.net/) sometimes uses different (but essentially eqiivalent) criteria. With a shift from 40nm to 28nm you can expect exactly double density circuits and much lower power consumption (it takes fewer electrons or holes acting on transitor gates to switch or amplify drain-source currents at 28nm than it does at 40nm).

So in actual fact, the slide actually sounds extremely realistic for a 28nm version of the 6990, given that they actually do 28nm nanoscale designs. There are additional complexities designing at this level. It's not like selecting the entire MOS mask and shrinking it on something like ModelSim.

 

[Duff-Man]

what is the advantage of a 28 nm die

With a smaller manufacturing process, the transistors you create are smaller, so you can cram more of them into the same area. More transistors means more shaders, ROPs, TMUs, and other general GPU horsepower.

28nm allows just over twice as many transistors to be packed into the same area, compared to 40nm, so you can expect both companies to be roughly doubling their shader count in their next high end cards.

 

[WingZero30]

I think with next genrations of 28nm cards and beyond, we will soon be seeing crysis and metro2033 maxed out with constant 60fps+ especially at full HD res.

 

[cammy5477]

Here's his build log:

http://forums.overclockers.co.uk/showthread.php?t=18249565

I don't think it's quite the same spec. as his sig.

that machine isnt his sig spec...i've got multiple posts in the linked thread trying to help the guy get his rig working....i would be very surprised if spec'd rig is real....if it is i'd love to see it