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[Reddit] RX 480 fails PCI-E specification - Page 46  

post #451 of 1129
Quote:
Originally Posted by sugarhell View Post

Tajoh you should watch koduri interview on Pcper. Polaris 10 is a product that was heavily influnced by polaris 11 on architecture and clocks. I can't really explain that well 50 mins video but he gives a lot of inside info.

480 looks bad in terms of p/watt because it seems that the gpu is out of the sweet spot of perf/watt . I will wait for 470 and polaris 11 to judge more

This.

I was trying to say that a couple days ago but it got buried in all the hysteria.
post #452 of 1129
Basically all p/w improvements have came from finfet 14nm, architecture did jack. i have 0 faith in vega now.

only way they can catch nvidia is by ditching that GCN.
post #453 of 1129
Quote:
Originally Posted by tajoh111 View Post

Yeah that initial 2.87 was impressive too if it was over the 270x since pitcairns was AMD most efficient part outside of bonaire and fiji. But then I was like 180watt TDP, what is AMD smoking.




Add in the clear exaggeration of AMD performance per watt improvements from polaris thus far and Polaris 11 will probably have somewhere along the lines of gtx 950 performance for 75 watts. Good for AMD but not good enough for finfet.

Cigars apparently.
post #454 of 1129
Quote:
Originally Posted by sugarhell View Post

Tajoh you should watch koduri interview on Pcper. Polaris 10 is a product that was heavily influnced by polaris 11 on architecture and clocks. I can't really explain that well 50 mins video but he gives a lot of inside info.

480 looks bad in terms of p/watt because it seems that the gpu is out of the sweet spot of perf/watt . I will wait for 470 and polaris 11 to judge more

I won't trust their graphs and figures after this prelaunch hype and debacle. My own predictons on Polaris have been bang on and I have been trying to control the hype. Heck you insulted me for it when I said 390x performance and look at today, we got less than that.

I was saying Tonga's performance per mm2, and 390x performance per mm2 were indicative of how far AMD was behind, which would translate into polaris performance. With 390x performance per mm2 not indicative of AMD true performance per mm2 because these cards are overclocked hawaii cards and eat into GCN's max frequency. Once you equalize the cooling, the gtx 980 is 15-20% faster than a 390x which I was shamed for by you.

http://www.overclock.net/t/1600940/videocardz-amd-radeon-r9-480-3dmark11-benchmarks/370

http://www.overclock.net/t/1600940/videocardz-amd-radeon-r9-480-3dmark11-benchmarks/390#post_25199291

Heres a bit of math the 390x is 10% larger than a gtx 980. This gives us a factor of 1.1

I was saying once you equalize the cooling, the gtx 980 is 15-20% faster than a 390x or hawaii in general. So lets average this and this becomes a factor of 1.175.

Then lets take the die size advantage of the gtx 1080 vs Polaris 10. 314mm2/232mm2. 1.35

1.1 * 1.175 * 1.35 = 1.75. in other words, the gtx 1080 should be 75% faster than Polaris 10.

Using Tonga(die 10% smaller, 50% difference in performance) as a baseline the difference is 1.83

Guess what.






And you were predicting gtx 980 ti/1070 performance.

How do you like them apples
Quote:
Originally Posted by magnek View Post

Cigars apparently.

Lol, lol lol. I walked right into that one.
Edited by tajoh111 - 7/1/16 at 2:13pm
post #455 of 1129
Quote:
Originally Posted by EightDee8D View Post

Basically all p/w improvements have came from finfet 14nm, architecture did jack. i have 0 faith in vega now.

only way they can catch nvidia is by ditching that GCN.

Meh, i disagree. I don't think Polaris has any bearing on Vega. Polaris strikes me as a last minute stop gap for the new process, similar to Pascal. Which is why both Pascal and Polaris more or less only gained from the shrink relative to their predecessors. Polaris is probably going to gain more than Pascal did because Polaris was designed for mobile/low performance. We'll find out for sure when P11 drops.

I think Vega is an entirely new architecture, what we were all calling Greenland ages back.
post #456 of 1129
Quote:
Originally Posted by tajoh111 View Post


Lol, lol lol. I walked right into that one.

biggrin.gif
Quote:
Originally Posted by GorillaSceptre View Post

Meh, i disagree. I don't think Polaris has any bearing on Vega. Polaris strikes me as a last minute stop gap for the new process, similar to Pascal. Which is why both Pascal and Polaris more or less only gained from the shrink relative to their predecessors. Polaris is probably going to gain more than Pascal did because Polaris was designed for mobile/low performance. We'll find out for sure when P11 drops.

I think Vega is an entirely new architecture, what we were all calling Greenland ages back.

Not gonna lie, I've given up on Vega after 480's launch. frown.gif
post #457 of 1129
Quote:
Originally Posted by EightDee8D View Post

Basically all p/w improvements have came from finfet 14nm, architecture did jack. i have 0 faith in vega now.

only way they can catch nvidia is by ditching that GCN.
If we're going to be saddled with dx11 then maybe yeah, they should strip it down and streamline it for serial API type workloads, but that's no were we're heading.
post #458 of 1129
Quote:
Originally Posted by magnek View Post

biggrin.gif
Not gonna lie, I've given up on Vega after 480's launch. frown.gif

The same happened for me when people bought 660ti instead of 7950 biggrin.gif
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post #459 of 1129
Man, everything was finally looking good for AMD, then boom their version of 480 happened. maybe vega is second coming of jesus, but i'll believe when i see it. till then shoot down every positive thing about it.
post #460 of 1129
They should've never named it RX 480, just way too reminiscent of GTX 480 and in more ways than one.

Proof
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