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About LinkBacksRead more.Leaked specifications reveal how AMD will bring Graphics Core Next to the mainstream.
Read more.Leaked specifications reveal how AMD will bring Graphics Core Next to the mainstream.
If it matches the 6870 in performance, I'm tempted to crossfire 2
"expected to hit retail at or below £130"
Too tempting.
Not too shabby (if the price is right), now for the 7870/7850.
Its not going to beat your current card though.Originally Posted by Jonatron
Nice. Waiting for 7850 though.. Hope will be around £200 mark. Also be nice to see some GTXes finally creeping out.. Can't wait till April.
Will beat a 4850 i betIts not going to beat your current card though.
Those GCN processors and the 7xxx series architecture is going to have to be a lot more potent that the older VLIW4s of the 6xxx series for a 7770 to even come close to a 6870. The 6870 has 1120 compared to the suggested 640 of the 7770. There is not even much of a difference in core clocks. Even my old 4850s have 800 VILW5 processors and at 625MHz (stock) they ought not to be too left to far in the distance.
I think the good old 6870s which seem to be at about £130 at the moment will remain best bang for buck for a while.
Still truth will out on Wednesday then
7770 @ 80 TDP would make a very good crossfire solution if the performance is on par with the 6870.
Confused, how is it onpar with the 6870?
7770 / 6870 / %difference
Core Clock(mhz): 1000 / 900 / +11%
Memory clock(mhz): 4500 / 4200 / +7%
Shaders: 640 / 1120 / -42.8%
Compute units: 10 / 14 / -28.5%
Texture Units: 40 / 56 / -28.5%
ROP: 16 / 32 / -50%
Memory Bus: 128bit / 256bit / -50%
So basically its MUCH weaker in everything except for a 11% core clock and 7% mem clock increase... I think its established that GCN is slower because its so new so i cant see how this will best it? Am i missing something
edit: looks like its going to be just close to a 6770 really? bump from 850 --> 1000 and a drop in mem from 4800---> 4500 then the rest is similar bar 800 shaders vs 640... confused!
Last edited by Hicks12; 13-02-2012 at 01:58 PM.
Other rumours put the HD7770 as having 1280 shaders and a 128 bit memory bus.
The HD7870 is meant to have 1408 shaders but with a 256 bit memory bus.
that would help a significant amount, however even with those amounts of shaders im seeing it being worse than the 6870 due to the backend being cut so badly and the memory, so much bottlenecking >.<
If these cards really come in with 640 / 512 shaders they're going to be a bit of a disappointment, tbh. Based on the previous moves from VLIW5 - VLIW4 - GCN, a 640 shader GCN card is equivalent to roughly an 800 shader VLIW5 card at the same clocks - and the outgoing 6770 *is* an 800 shader VLIW5 card. The clock speeds have been bumped up which will help it perform a little better, but if these rumours are true we're unlikely to see 6870-beating performance from the 7770 - unless AMD have mixed some special sauce in to the GPU, of course...
What about the HD5770 1GB though?? Slightly slower at older games than an HD4870 1GB but both have 800 shaders,although the HD4870 1GB has much higher memory bandwidth. In newer games the HD5770 1GB tends to be quicker.
The specs of the HD7770 look hardly any better than the HD5770. So much for progress.
I would've assumed a brand spanking new card would be better. Assume makes an ass out of you and me. Well more so me than you.
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