MY R390X Predictions

[Brackle]

that was truly expected since the 285 launch... they need the replacement to the 280X so.. 285X was obviously.. but that can't compete with nvidia yet..

Yea I have my doubts. But at the same time, if you told me a 1664 cuda core maxwell card would compete with a 780ti. I would of called you crazy.

 

[Araxie]

Yea I have my doubts. But at the same time, if you told me a 1664 cuda core maxwell card would compete with a 780ti. I would of called you crazy.

yup.. but remember the performance of the 285 vs the 280... they are pretty tied.. some games favored the 285 others the 280.. and with the same amount of shaders, rops etc just with less bandwidth.. I can expect the same for the 285X maybe 10% better than the 280X..? the 285X can't be too strong if still are under the performance of the 290..

 

[Brackle]

yup.. but remember the performance of the 285 vs the 280... they are pretty tied.. some games favored the 285 others the 280.. and with the same amount of shaders, rops etc just with less bandwidth.. I can expect the same for the 285X maybe 10% better than the 280X..? the 285X can't be too strong if still are under the performance of the 290..

Well thats the thing. with the 285 having less bandwidth it still matched the performance of the 280, and sometimes the 280x.

Now will a full on 285x with 48rops and a 384bit bus beat a 280x? I would think so easily.

Will it beat or catch a 780/970? I honestly have my doubts.

 

[reaper12]

There is no 285x. There never was.

 

[Brackle]

There is no 285x. There never was.

Guess you didnt read that new article.

 

[Araxie]

There is no 285x. There never was.

AMD its looking to replace 280 and 280X from the market..so yes, the coming card its a 285X.. probably at 280$-300$.. (sadly that will have no market with the 970 out there)

 

[Feellia]

970 prices seem to get higher, I imagine Tonga xt is aimed at the sub 970 cards, and that Fiji pro/xt wil be aimed at the 970/980.

like I said before I doubt AMD will go after the Ti/Titan price bracket...even the 290x was sub 600$ at release..besides the mining craze.

Tonga and Fiji seem taped out anyway on 28nm, unless something has changed for Fiji, I know the specs are off, but

http://cdn.videocardz.com/1/2014/07/Synapse-Design-500mm-AMD-GPU.jpg

http://www.3dcenter.org/dateien/abbildungen/AMD-nVidia-Portfolio-Roadmap-8-September-2014.png

 

[tajoh111]

Well thats the thing. with the 285 having less bandwidth it still matched the performance of the 280, and sometimes the 280x.

Now will a full on 285x with 48rops and a 384bit bus beat a 280x? I would think so easily.

Will it beat or catch a 780/970? I honestly have my doubts.

There's a 50% performance difference between the the gtx 970 and 285.

Memory bandwidth isn't going to bring performance up that much, if we learned anything from the gtx 980 launch, memory bandwidth is overated. The 256 bit bus was enough for the gtx 680 to compete against the 384 bit bus of the 7970 and I don't think another 50% more bandwidth is going to change anything for the 285. Particularly if the color compression is already giving them the extra bandwith they need.

14% percent more shaders and more ROP are going to increase the performance, but I suspect 20% in total. Most of the performance is going to come from the shader increase as that increase computational power.

Going by the 50% performance between the the gtx 970 and the 285 and the 30% performance gains in power for the maxwell cores, I suspect the gtx 970 1664 cores are very close in performance to the 2048 cores of Tonga clock for clock. Where the big difference comes from is that the gtx 970 cores are clocked 30 plus percent higher.

 

[ToddW2]

...... days gone by

 

[Relayer]

There's a 50% performance difference between the the gtx 970 and 285.

Memory bandwidth isn't going to bring performance up that much, if we learned anything from the gtx 980 launch, memory bandwidth is overated. The 256 bit bus was enough for the gtx 680 to compete against the 384 bit bus of the 7970 and I don't think another 50% more bandwidth is going to change anything for the 285. Particularly if the color compression is already giving them the extra bandwith they need.

14% percent more shaders and more ROP are going to increase the performance, but I suspect 20% in total. Most of the performance is going to come from the shader increase as that increase computational power.

Going by the 50% performance between the the gtx 970 and the 285 and the 30% performance gains in power for the maxwell cores, I suspect the gtx 970 1664 cores are very close in performance to the 2048 cores of Tonga clock for clock. Where the big difference comes from is that the gtx 970 cores are clocked 30 plus percent higher.

Bandwidth is not just dictated by bus size. It's frequency as well and the 680 used faster RAM to make up a bit. It still dropped off at high res relative to the 7970 though.