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[OC3D] AMD's Zen will have a "greater than 40%" IPC improvement over Excavator, says Lisa Su - Page 66

post #651 of 841

This is getting interesting. Based off earlier data about Excavator, my estimated average performance increase was 9.85%. These new numbers are pushing it upward, which also pushes Zen upward. I have an FM2+ system for my HTPC running an A10-7800 or something, so I might just grab an x4 845 for its ~$62 (ShopBLT) price tag and run the numbers myself and get a more thorough comparison going on.

At this time, I'm at an 10.75% IPC improvement, much definitely focused in the FPU (+15%).

That pushes Zen right on top of Haswell (though the performance profiles are going to be so different that we're still talking +/- 10% margins here).

If the trend continues, however, we will be at a 13% improvement for Excavator over Steamroller, so I'm quite interested in these results thumb.gif

I really need WebXPRT, Octane v2, and 7-zip results (32mb & 256mb dictionary sizes), as these will give me some more data about the performance profile.
post #652 of 841
Quote:
Originally Posted by looncraz View Post

This is getting interesting. Based off earlier data about Excavator, my estimated average performance increase was 9.85%. These new numbers are pushing it upward, which also pushes Zen upward. I have an FM2+ system for my HTPC running an A10-7800 or something, so I might just grab an x4 845 for its ~$62 (ShopBLT) price tag and run the numbers myself and get a more thorough comparison going on.

At this time, I'm at an 10.75% IPC improvement, much definitely focused in the FPU (+15%).

That pushes Zen right on top of Haswell (though the performance profiles are going to be so different that we're still talking +/- 10% margins here).

If the trend continues, however, we will be at a 13% improvement for Excavator over Steamroller, so I'm quite interested in these results thumb.gif

I really need WebXPRT, Octane v2, and 7-zip results (32mb & 256mb dictionary sizes), as these will give me some more data about the performance profile.

Don't forget the one I linked. It's the same user but on our forum.
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post #653 of 841
Quote:
Originally Posted by Robenger View Post

Don't forget the one I linked. It's the same user but on our forum.

I was actually about to suggest that to him when I saw that earlier. Figured he and the guy who has the chip could chat about it and get some more diverse benchmarks done.
post #654 of 841
Quote:
Originally Posted by Robenger View Post

Don't forget the one I linked. It's the same user but on our forum.

Saw that one as well ;-)

I have been running some numbers and the difference to Zen won't be huge, but as the numbers are all going in the right direction, it makes it more likely that Zen will match Haswell.

I should generate a few graphics from my numbers, they're immense biggrin.gif
post #655 of 841
Quote:
Originally Posted by looncraz View Post

Saw that one as well ;-)

I have been running some numbers and the difference to Zen won't be huge, but as the numbers are all going in the right direction, it makes it more likely that Zen will match Haswell.

I should generate a few graphics from my numbers, they're immense biggrin.gif

Please do and don't tease us like that.
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post #656 of 841
I've played around with an excavator cpu. I spent last weekend playing on a fm2+ system swapping between a x840(steamroller) and x845(excavator).

AMD really did hit their 15% performance improvement mark per generation. Kaveri was the oddball, in which had relatively small gains over piledriver. I wasn't overly excited for the bristol ridge parts but after playing around with my first excavator even in its single channel memory configuration it proved to be quite impressive. Overall the performance jump between steamroller and Excavator looks to be a larger delta than between the original bulldozer and piledriver. Kinda sucks for people like me who still have a AM3+ platform that steamroller and excavator never made it into a packaged unit. I would have no problem going from my current 8320@5ghz to a 8 core excavator. Reality is I don't think anyone expected much out of excavator, since AMD started teasing Zen. If AMD claims hold true and that 40% faster than excavator holds true then Zen is a pretty fast chip. The x845 does only run single channel memory, so simply increasing its scores by 40% still leaves a bit of performance on the table as Zen will come with at least dual channel memory.

I suspect bristol ridge chips to run in dual channel so we will have to wait for those to get true estimates, but as it stands right now x845 + 40%IPC roughly = haswell. In cinebench R15 my X845@3.8ghz scored 98cb single core, 40% would put that figure at 137cb. The 4770k @ 3.5ghz scores 155cb. Again this is run with single channel memory, and no l3, so we could expect small bumps in performance with those.


I just want a excavator AM3+ chip, or Zen (really being optimistic here). Of course I'm just patiently waiting till something really warrants an upgrade. I was going to get the 6700k, but then they shot up in price, making the 5820k a better deal. So might as well wait till the 6700k price drops back down, or AMD Zen is released.
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post #657 of 841
Quote:
Originally Posted by ebduncan View Post

I've played around with an excavator cpu. I spent last weekend playing on a fm2+ system swapping between a x840(steamroller) and x845(excavator).

AMD really did hit their 15% performance improvement mark per generation. Kaveri was the oddball, in which had relatively small gains over piledriver. I wasn't overly excited for the bristol ridge parts but after playing around with my first excavator even in its single channel memory configuration it proved to be quite impressive. Overall the performance jump between steamroller and Excavator looks to be a larger delta than between the original bulldozer and piledriver. Kinda sucks for people like me who still have a AM3+ platform that steamroller and excavator never made it into a packaged unit. I would have no problem going from my current 8320@5ghz to a 8 core excavator. Reality is I don't think anyone expected much out of excavator, since AMD started teasing Zen. If AMD claims hold true and that 40% faster than excavator holds true then Zen is a pretty fast chip. The x845 does only run single channel memory, so simply increasing its scores by 40% still leaves a bit of performance on the table as Zen will come with at least dual channel memory.

I suspect bristol ridge chips to run in dual channel so we will have to wait for those to get true estimates, but as it stands right now x845 + 40%IPC roughly = haswell. In cinebench R15 my X845@3.8ghz scored 98cb single core, 40% would put that figure at 137cb. The 4770k @ 3.5ghz scores 155cb. Again this is run with single channel memory, and no l3, so we could expect small bumps in performance with those.


I just want a excavator AM3+ chip, or Zen (really being optimistic here). Of course I'm just patiently waiting till something really warrants an upgrade. I was going to get the 6700k, but then they shot up in price, making the 5820k a better deal. So might as well wait till the 6700k price drops back down, or AMD Zen is released.

Your x845 3.8 is only turbo, it doesn't mean it even stayed there during the bench on all cores. You should've disabled the turbo to do the test.
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post #658 of 841
Quote:
Originally Posted by ebduncan View Post

I've played around with an excavator cpu. I spent last weekend playing on a fm2+ system swapping between a x840(steamroller) and x845(excavator).
Kaveri was the oddball, in which had relatively small gains over piledriver.
I've read as little as 6% and as much as 21% over piledriver. All I know is if this 845 locked to 3.8Ghz matches my kaveri at 4.4Ghz in gaming benches I may just switch.
post #659 of 841
Quote:
Originally Posted by 7850K View Post

I've read as little as 6% and as much as 21% over piledriver. All I know is if this 845 locked to 3.8Ghz matches my kaveri at 4.4Ghz in gaming benches I may just switch.

I'm at 1.42v at 4.4ghz where the Carrizo sits at a higher voltage at 3.8ghz. So I'm not sure if it's really beneficial to run a Carrizo or Kaveri.

I do have a spare mobo for FM2+ from Gigabyte that's incredibly stable for OCing. I wouldn't mind trying to tweak Carrizo to hell and seeing how much I can push that BCLK and try to overclock the south bridge to stabilize it.
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post #660 of 841
Quote:
Originally Posted by SpeedyVT View Post

I'm at 1.42v at 4.4ghz where the Carrizo sits at a higher voltage at 3.8ghz. So I'm not sure if it's really beneficial to run a Carrizo or Kaveri.

I do have a spare mobo for FM2+ from Gigabyte that's incredibly stable for OCing. I wouldn't mind trying to tweak Carrizo to hell and seeing how much I can push that BCLK and try to overclock the south bridge to stabilize it.

I would personally wait for the bristol ridge parts, as they won't be gimped, and will have unlocked multiplier

btw yes it's turbo was 3.8ghz but it didn't stay at 3.8ghz at all, it throttled pretty bad.
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