Haswell vs Kaveri

Alexko said:
It would seem that Kaveri, as a chip, supports four memory channels, even though FM2+ implementations can only use two:

http://www.chip-architect.com/news/Kaveri_Trinity_2014-01-07.jpg
More details and further evidence from Hans de Vries here: http://semiaccurate.com/forums/showpost.php?p=204808&postcount=2925

So, quad-channel DDR3L in laptops? Or for servers/HPC? Something SteamBoxy? Dave? :)
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Simplest explanation: Larger PHYs for higher frequencies.
RAM is available at what in the market right now? DDR3-3000?

edit: The further evidence talks about registers for more memory controllers specifically, not more memory controllers, which I highly doubt are phsyically implemented in this instance of Kaveri, rather a posiibility for the architecture as opposed to the chip.
 
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Some new benchmarks comparing A10-7850K to A10-5800K both stock and OC'ed done by one lucky user.

All credits to djohny from noticials3D forum!

http://foro.noticias3d.com/vbulletin/showthread.php?t=421821

Test setup:
* A10-5800K @ 4450Mhz / DDR3 @ 2544Mhz / NB @ 1900Mhz / IGP @ 1151Mhz.
* A10-7850K @ 4556Mhz / DDR3 @ 2544Mhz / NB @ 1900Mhz / IGP @

Gaming:

AMD HD 7950 @ 1100/1500Mhz.
rxx4.jpg


0nno.jpg


hmyk.jpg


ew5y.jpg


l678.jpg



 
For some reason, the memory and L2 latency is quite a bit up for the Kaveri sample, though the overall throughput is definitely improved. :???:
 
fellix said:
For some reason, the memory and L2 latency is quite a bit up for the Kaveri sample, though the overall throughput is definitely improved. :???:
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The L2 latency only goes up in Kaveri when it's overclocked. I think it might be a glitch in AIDA64, perhaps related to some kind of power-management feature, maybe Steamroller's ability to dynamically resize its L2.

There's less reason to doubt the main memory results, however.
 
Wonder why AMD only sent TechReport the A8-7600. I thought companies usually sent the fastest version of a chip on release.
 
95W A10-7850 is very BW limited, its performace is just slightly higher than 100W A10-6800K. A8-7600 is more interesting, it's close to 6800K's performance even at 45W TDP.
 
On the other hand, the majority of benchmark results were not up to par by current standards. The 7850K’s CPU scores point towards a worrying trend: a real lack of inter-generational x86 performance increases. There were some IPC improvements that actually made things close but on average, it didn't deliver one iota more performance than its A10 6800K predecessor or provide anything in the way of efficiency increases. The K-series part didn't even distinguish itself all that well from the 65W, $55 less expensive A8 7600. This isn't just a poor showing; it's devastating for an APU that costs 20% more than the product it’s supposed to replace. v
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http://www.hardwarecanucks.com/foru...1-amd-kaveri-a10-7850k-a8-7600-review-28.html
 
The 45W A8-7600 is doing really good, but what the hell are the remaining 50W (for the 7850K) used for!?
Even in the low-settings gaming tests (where both cpu and gpu are reasonably utilized - I guess the 45W can't run both at full speed) the difference is pretty minor (tops at 25%, but generally less).

Really looks like a laptop apu. Which also makes sense considering the price window for the 100W desktop apus are quite narrow (they are close to the price of a similar "gpu-less" cpu / cheaper memory and a better, real gpu), so those gpu-heavy apu's makes most sense for laptops at the moment.
 
Psycho said:
The 45W A8-7600 is doing really good, but what the hell are the remaining 50W (for the 7850K) used for!?
Even in the low-settings gaming tests (where both cpu and gpu are reasonably utilized - I guess the 45W can't run both at full speed) the difference is pretty minor (tops at 25%, but generally less).

Really looks like a laptop apu. Which also makes sense considering the price window for the 100W desktop apus are quite narrow (they are close to the price of a similar "gpu-less" cpu / cheaper memory and a better, real gpu), so those gpu-heavy apu's makes most sense for laptops at the moment.
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The 45w version seems to be the best product, the 7850k is disappointing.

The price increases are not justified.
 
The 45W version is the most interesting, indeed. I'd also be interested to see how a version with 4 CPU modules and half the GPU would fare (that should be roughly size neutral).
 
Shouldn't there be a new APU catalyst driver released today along with the parts? Where is the "dual graphics" portion of this APU rollout showing off the GPU performance instead of underwhelming everyone with the minor CPU gains on the 95 watt parts?
 
overclocked_enthusiasm said:
Shouldn't there be a new APU catalyst driver released today along with the parts? Where is the "dual graphics" portion of this APU rollout showing off the GPU performance instead of underwhelming everyone with the minor CPU gains on the 95 watt parts?
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Anandtech said:
AMD did address the concept of Dual Graphics in their press deck. In their limited testing scenario, they paired the A10-7850K (which has R7 graphics) with the R7 240 2GB GDDR3. In fact their suggestion is that any R7 based APU can be paired with any G/DDR3 based R7 GPU. Another disclaimer is that AMD recommends testing dual graphics solutions with their 13.350 driver build, which due out in February. Whereas for today's review we were sent their 13.300 beta 14 and RC2 builds (which at this time have yet to be assigned an official Catalyst version number).
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They then proceed to a couple of press deck slides with benchmarks.
 
Zaphod said:
The 45W version is the most interesting, indeed. I'd also be interested to see how a version with 4 CPU modules and half the GPU would fare (that should be roughly size neutral).
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4 modules sans GPU would be good, if only for the power savings vs the current FX series.

On the other hand, imagine a native 8 core, 16 thread Haswell with 16MB L3 and no IGP and 150W TDP :oops:
 
I haven't had time to go over all the reviews, but I find it fascinating to see the progression of APU die shots from Llano to Trinity to Kaveri, with the latest APU being shot through the pad layer or otherwise obfuscated.

From what I can tell, AMD's marketing and deployment for this launch have been similarly transparent and useful, so it might be a thematic choice.
 
Anands HSA deep dive is pretty awesome. I'd wondered how Intel compared on the "HSA" front. Interesting to see that they were actually ahead of Trinity/Richland.
 
So basically, there are some nice improvements for 45W chips, especially but not only on the GPU side, and it bodes quite well for mobile SKUs, but Kaveri is essentially pointless at 65W or more. I guess that's it, AMD is definitely out of the enthusiast desktop market. Oh, well.

There's also a very substantial and rather odd increase in memory latency:
IMG0043802.png

http://www.hardware.fr/articles/913-5/cpu-protocole-ddr3-2400.html
 
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