AMD A10-7870K Godavari APU review

Posted on: 07/27/2015 09:01 AM

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Small boost to iGPU Nice review as always. Would recommend this to a budget htpc build.

Posted on: 07/27/2015 09:22 AM

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Unfortunatelly the big problem of Amd Cpu is Single Core performance.
An old Q9650 3.0 Ghz (2008) with OC,say at FX 8320 3.5GHz (2012) at turbo speed 4.0GHz, will smash all AMd cpu in Single Core Perf.
So in browsing,office,multimedia enviroment an old 2008 cpu will smash "new" cpus from Amd.Not many apps are optimized for 4-6-8 cores. Sad but true.

So this A10-7870K (TDP 95W) will be again smashed by an i3 4330 3.5GHz (TDP 54W) in Single Core performance. For low profile and low TDP an i3 its a must.

I dont find A10-7870K passmark single core,but A10-7850K its almost the same:

Passmark (Single Core)

i3 4330 2,031
A10 7850K 1,578
FX 8320 1,402
i3 4360 2,150
i5 4570 2,068
i5 3570K 2,012
FX 6300 - 1,446


Cinebench R10 32-Bit (Single Core)

i3 4360 7,369
A10 7870K 4,051
i3 4330 6,784
A10 7850K 4,273
i5 4690K 7,619
i5 3570K 6,557
FX 6300 4,101


Im shocked how i3 Haswells are so good in Single Core performance.

Posted on: 07/27/2015 09:38 AM

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Well we could do the same in the BIOS... add XXXMHz, tweak the GPU and there you go.

Funny to see it gets close to the 2500K in some benchmarks.

Posted on: 07/27/2015 09:46 AM

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I get that example with Q9650 sk 775 at same speed to FX 8320 to see how an old architecture perform against some new architecture from Amd.
Well cant wait to see how Amd Zen will perform.

Posted on: 07/27/2015 10:46 AM

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Hilbert don't you test how much you can oc it?

Posted on: 07/27/2015 11:53 AM

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I honestly can't think of a reason why. These CPU's are all exactly the same so any difference you see might as well be silicon quality A.K.A. the "silicon lottery"

Posted on: 07/27/2015 11:58 AM

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A10-7850K has that 95W TDP limit which prevented it from efficient OC as it simply throttled not once certain temperature been reached, but as it ate certain amount of power.
In other words, increasing voltage in belief that it improves OC clock and adds stability resulted in increased power consumption and lower performance.
I would be interested in seeing if AMD tweaked this in A10-7870k, but I do not expect that to happen as entire system in measurement topped at 120W.

- Would be interesting to do bench at default clock, add 100MHz, bench, add 100MHz bench, ...
- Then lower voltage a bit and bench at default clock, keep lower voltage, add 100MHz bench, ...
- And finally doing previous for bit higher voltage

Then create performance map for purpose of objectively seeing if & how TDP limits this APU.

If anything Carrizo is impressive part at 12/15/25/35W configurations due to HSA 1.0. A10-7850k is just for little play, I would not find long term purpose for it, tho one can fit it in very small box with like 180~220W PSU for maximum efficency.

95W w/ OC vs 35W.
95W w/o OC vs 35W.
Best of A10-7850k (4.7GHz) vs best of A10-7870k (4.5GHz).

Posted on: 07/27/2015 05:09 PM

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Very good review.

Posted on: 07/27/2015 06:30 PM

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APU's overclocking is limited, so best bet for these is to get high speed low timing ram, and boost the gpu and memory clocks up.

Posted on: 07/28/2015 12:47 AM

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what amd has here is an amazing product they just desperately need a die shrink and minor cpu bump to compete.

Posted on: 07/28/2015 02:57 AM

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and a lot of money to push hsa/huma/opencl implementation to apps devs (zzz dreaming zzz)