Originally Posted by lolfail9001
Not to rain on parade but AMD only switched the song to "mainstream aim only" around late April. Raja did imply we will see some serious performance out of Polaris in his early interviews ON TOP OF lowering entry point for VR. Some even speculated beyond that (cough Mahigan).
I was talking about Vega and not Polaris. I speculated that Polaris 10 would output around FuryX performance. The RX 480 appears to be around 390x performance which means that the 480x will probably hit the Fury X performance figures.
There are two Vega SKUs. One which is set to compete with GP104 and the other with GP102. Think about it... RX 480 has around 256GB per sec of memory bandwidth and is able to keep up with a card that has around 384GB per sec of memory bandwidth performance. The RX 480 has 2304 cores and is able to compete with a card which has 2816 cores. So I mentioned a 30 to 40% IPC increase for Polaris 10 (a particular user here disagreed with me). AMD showed a 1.8x performance per watt figure due to Finfet followed by a 2.8x figure due to architectural improvements. Basically... AMD are agreeing with what I was saying. You can see this by comparing the amount of memory bandwidth needed for both.
5500 Gflops with 256GB per second vs 5900 Gflops with 384GB per second. That is 21.5 Gflops per 1GB per s of memory bandwidth matching 15.4 Gflops per 1GB per s of memory bandwidth. That means an architectural efficiency boost of 140% or 40% boost in that department. That is HUGE. AMDs memory controller improvements as well as architectural improvements are at play here. It allows AMD to circumvent one of their largest architectural flaws (the reason Hawaii was using a 512bit bus in the first place). All that for under 150W (a single 6 pin with motherboard power offers around 150W max). The full Polaris 10 (RX 480x) will come with 2560 cores vs 2304 cores for the RX 480.
Big Vega will likely pack around 4096 cores whereas the smaller Vega (RX 490 and 490x) will pack less (between 2560 and 4096).
So AMD have released a very competitive part. At $199 ($229 for the 8GB model)... WOW.Edited by Mahigan - 6/1/16 at 6:27am