AMD A10-7870K Godavari APU review

Posted on: 07/27/2015 12:53 PM

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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 12:58 PM

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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 06:09 PM

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Very good review.

Posted on: 07/27/2015 07:30 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 01:47 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.