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post #2911 of 3492
Quote:
Originally Posted by CynicalUnicornΒ View Post

In FPU, sure. In integer, no, not really.

My "estimate" may have been a "bit" of an exaggeration wink.gif
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post #2912 of 3492
Quote:
Originally Posted by CynicalUnicornΒ View Post

Does anybody have any idea of what happened? We were supposed to see 10-20% gains for most stuff. Did AMD just re-release Piledriver but with a few minor tweaks and a better iGPU?
The 20% gain is there clock for clock but is negated by the lack of clock. Anyhow the gain is on mobile and low tdp the a8-7600 has a 600MHz gain over low power 2,5GHz
post #2913 of 3492
4.0/3.7x = 1, where x is the percent increase in IPCs. It comes out to about 8%

Quote:
Originally Posted by elemeinΒ View Post

My "estimate" may have been a "bit" of an exaggeration wink.gif

I did catch that. Bulldozer and its derivatives may not be great, but they aren't that bad. biggrin.gif
Edited by CynicalUnicorn - 1/16/14 at 2:26pm
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post #2914 of 3492
Quote:
Originally Posted by maarten12100Β View Post

The 20% gain is there clock for clock but is negated by the lack of clock. Anyhow the gain is on mobile and low tdp the a8-7600 has a 600MHz gain over low power 2,5GHz

The average is much, much lower than 20% though. Sure there are situation where you'll see 20% but this is also the case with other small IPC jumps like PD, IB and haswell. All of those have been in the roughly 5-10% range and kaveri/steamroller would seem to fit into that as well.

Even AMD isn't saying it's 20% clock for clock gain. Even in their slides it's "up to 20%" meaning that 20% is pretty much the best case scenario.
 
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post #2915 of 3492
Quote:
Originally Posted by AlatarΒ View Post

Even AMD isn't saying it's 20% clock for clock gain. Even in their slides it's "up to 20%" meaning that 20% is pretty much the best case scenario.



Mostly the first panel, but the other two are somewhat relevant? This is what comes to mind whenever I hear "up to N" anymore. What got improved and declined exactly? Integer calculations a up a bit, FPU if anything suffered a loss, and overclocking is more-or-less unaffected. That is all I have.
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post #2916 of 3492
Quote:
Originally Posted by CynicalUnicornΒ View Post

Does anybody have any idea of what happened? We were supposed to see 10-20% gains for most stuff. Did AMD just re-release Piledriver but with a few minor tweaks and a better iGPU?

http://uk.hardware.info/reviews/5156/43/amd-a10-7850k-kaveri-review-amds-new-apu-steamroller-vs-piledriver

"Steamroller vs. Piledriver

To find out what the performance difference is between Steamroller and the previous generation Piledriver architecture, we ran a number of CPU benchmarks on the AMD A10-6800K (Richland with Piledriver cores) and AMD A10-7850K (Kaveri with Steamroller cores) clocked at 3.7 GHz and turbo disabled.

Here we can verify AMD's claim that the IPC has been increased by 20 percent in some cases. Both in x264 Pass 2 and in TrueCrypt we measured an increase of more than 22 percent. In Cinebench 11.5 we arrived at more than 11%. There are also a few instances where Steamroller is slower than the previous generation, for example in the Excel 2013 Monte Carlo benchmark.

Based on these six benchmarks we arrived at an average of more than 14 percent, but that includes a few best-case scenarios. AMD itself mentions about 10 percent, based on a much larger set of benchmarks. That 10 percent increase is largely undone by the lower clock frequency, as you saw in the benchmark results."



Anyone having an explanation for the monte carlo regression? Could it be FPU intensive?
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post #2917 of 3492
That's not too bad, actually. I just wish they had a larger thermal envelope with which to work, but the architectural improvements are roughly around Nehalem to Sandy, right? Stock vs stock is disappointing, but people are reporting 5GHz on air to be fairly easy. That's where the improvements will be, ya know, improvements. Maybe they'll bin some chips and release the A11-9001k: 5GHz stock and this time not $1000.
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post #2918 of 3492
Quote:
Originally Posted by CynicalUnicornΒ View Post

That's not too bad, actually. I just wish they had a larger thermal envelope with which to work, but the architectural improvements are roughly around Nehalem to Sandy, right? Stock vs stock is disappointing, but people are reporting 5GHz on air to be fairly easy. That's where the improvements will be, ya know, improvements. Maybe they'll bin some chips and release the A11-9001k: 5GHz stock and this time not $1000.

I think the fact of the matter is that with a lot of overhead relieved, a 2M/4T design would be good enough for most games, then just couple that with a great iGP that isn't dying of bandwidth like a certain iGP I know and you get a package that can medium (at the minimum) most games at 1080p for a low-ish price (way too high now... AMD please drop it to 160$ max. Thanks.) Place that in the right arena, get the programming initiative for it ablazing and you have a good option.

For budget gamers.

Plot twist: That's only a small segment of the overall PC market.

Still a good CPU though. If you look at it compared to a 6800K and pop it into it's most-used purpose (budget gaming, HTPC, etc.), then you get an APU that's made well over a 20% overall increase.
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post #2919 of 3492
CPU gains aren't much, but you're right. GCN 1.0 -> GCN 1.1 and 6 GPU cores -> 8 GPU cores is something like a 35-40% boost. The only problem is bandwidth. C'mon, DDR4!
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post #2920 of 3492
I've had it for two days.

Other than the wall I've hit trying to overclock passed 4.5Ghz, I can honestly say I'm pleasantly surprised on the x86 side of things.

While it doesn't show in the synthetic benchmarks on a few poorly threaded games I've definitely found a difference in GPU usage and minimum frames. Obviously this is limited as the future is HSA and properly threaded games, but suffice to say I did not expect to go from 64% GPU usage with minimum frames in the teens in GW2 on my FX8350 at 4.9 Ghz, to 89% GPU usage with minimum frames in the low twenties on Kaveri at 4.5Ghz.

So while it's a niche, at least for a game I play all the time, it's a welcome improvement.
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