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[WCCF] AMD RX 480 Can Hit 1.5Ghz+, New Overclocking Tool With Voltage Control Coming - Page 219  

post #2181 of 2870
Quote:
Originally Posted by Pyrotagonist View Post

In the end it's the performance that matters, and they got 70% greater efficiency while pushing clocks to 2GHz. Minor shader efficiency regressions or not, that's impressive.

Yes the performance per watt is impressive. But i don't really care to much for Performance per watt, because 90% of the time my card idles and i game the other 10%. I care about overall performance and to a lesser extent price.

So its impressive from an engineering point of view yes, does it make me want to run out and buy it - no.

Will AMD match Nvidias performance per watt this gen, i doubt it seriously . Will i care , no - not at all just as long as pricing is right and the vega card performs where i want it too.

The next generation we are going to get down to 10watt differences at 7nm or so and i seriously could care less even before then about power efficiency.

The only decent thing i see worth upgrading to in pascall is smp and the gains from that are no-where to be seen and won't be for a while.
post #2182 of 2870
Quote:
Originally Posted by Pyrotagonist View Post

In shader efficiency perhaps not, but they seem to have done quite a bit with power consumption. Still, I get what you're saying.
If it's 390x perf at 100W, they just caught up to NVIDIA in perf/watt while falling flat on their faces in perf/mm^2. Either way you slice it, Polaris didn't catch up to NVIDIA on the technology side, despite NVIDIA effectively doing nothing on their uArch.
post #2183 of 2870
Quote:
Originally Posted by magnek View Post

Did you see my post above? Might be a bit too early to accurately judge IPC improvements.
I don't get it tbh.
Could you perhaps rephrase what you mean?
post #2184 of 2870
Quote:
Originally Posted by Tisser12 View Post

Such a plethora of great information in this thread. doh.gif It's a shame forums are still a proving ground to flex your internet muscles. If anyone could actually answer some questions and quit arguing for a second I'd like to know how long after release AIB cards take to start showing up?

First rumor was they'll be along side reference models, now mid july. so, nobody really knows. Am waiting for them too, especially reviews with proper drivers. I'm aiming at Sapphire.
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post #2185 of 2870
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Originally Posted by lolerk52 View Post

If it's 390x perf at 100W, they just caught up to NVIDIA in perf/watt while falling flat on their faces in perf/mm^2. Either way you slice it, Polaris didn't catch up to NVIDIA on the technology side, despite NVIDIA effectively doing nothing on their uArch.
Perf/mm^2 isn't linear. Hawaii was a huge improvement over Tahiti in that department. Tahiti's 2048 shaders lost to GK104's 1536 shaders while Hawaii's 2816 shaders basically matched GK110 2880, with Tahiti (352) being considerably larger than GK104 (294), but Hawaii (438) being much smaller than GK110 (561).

How would shrinking Hawaii with no arch improvements put them in a better position? They'd have the same card, but with worse power consumption.
post #2186 of 2870
Quote:
Originally Posted by lolerk52 View Post

NVIDIA was already a gen ahead of AMD in efficiency with Maxwell. AMD had a chance to catch up against Pascal and they didn't take it. What happens when Volta releases?

AMD didn't actually release a new generation, they just overclocked the old one and updated their drivers and it still beat maxwell in a lot of games.

So yes they were behind in efficiency , if they catch up is still to be seen. I think the RX480s default clock will be impressive performance per watt , overclocking it however will undo this a bit. People buying the AIB 480s will care less i think about 20-30 watts extra used in the OC.
post #2187 of 2870
Quote:
Originally Posted by lolerk52 View Post

I don't get it tbh.
Could you perhaps rephrase what you mean?

nVidia claimed Maxwell had 35% IPC (shader efficiency to be accurate) improvement over Kepler

980 has 29% less shaders but 31% higher clockspeed than 780 Ti (so a wash basically in raw TFLOPS), yet only ends up being 10% faster even after drivers have matured.

So either nVidia's quoted 35% figure is way off, or IPC/shader efficiency isn't that easy to extract from shader count and clockspeed alone.
post #2188 of 2870
Quote:
Originally Posted by lolerk52 View Post

They could have shrunk Hawaii and had a similar chip in perf/mm^2 and perf/watt to the 1070.

Do you know that Polaris 10 has less SP than Hawaii??
Quote:
Originally Posted by Pyrotagonist View Post

Perf/mm^2 isn't linear. Hawaii was a huge improvement over Tahiti in that department. Tahiti's 2048 shaders lost to GK104's 1536 shaders while Hawaii's 2816 shaders basically matched GK110 2880, with Tahiti being considerably larger than GK104, but Hawaii being much smaller than GK110.

How would shrinking Hawaii with no arch improvements put them in a better position? They'd have the same card, but with worse power consumption.

Tahiti lost to GK104 due to the poor drivers. At this moment Tahiti can trade low with the 2304 GK110 in GTX780.
post #2189 of 2870
Quote:
Originally Posted by Pyrotagonist View Post

Perf/mm^2 isn't linear. Hawaii was a huge improvement over Tahiti in that department. Tahiti's 2048 shaders lost to GK104's 1536 shaders while Hawaii's 2816 shaders basically matched GK110 2880, with Tahiti (352) being considerably larger than GK104 (294), but Hawaii (438) being much smaller than GK110 (561).

How would shrinking Hawaii with no arch improvements put them in a better position? They'd have the same card, but with worse power consumption.
Shrinking Hawaii would mean 44CU's at near the same die size as Polaris, while also benefitting from clock speed improvements from the node. Perf/watt would improve by 1.7x from the node alone, as AMD stated in their Polaris reveal.
post #2190 of 2870
Quote:
Originally Posted by rdr09 View Post

First rumor was they'll be along side reference models, now mid july. so, nobody really knows. Am waiting for them too, especially reviews with proper drivers. I'm aiming at Sapphire.

Thanks to all the answers. I'm looking at another sapphire card also. My HD6950 takes a beating and keeps on ticking and I've heard a lot of others say they'll always go sapphire if they can. I'm the same way.
    
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