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AMD A10-5800K and A8-5600K: the second desktop APU!
by Guillaume Louel
Published on November 26, 2012

GPU average

While each individual score is of course of interest, we have calculated an average graphics performance for each of the solutions.


The first thing to note is that we can clearly see that cards such as the AMD Radeon HD 6450 or the Nvidia GeForce GT 620 are no longer worth buying, even when compared with the Intel HD 4000. However, you can still pay between €40 and €60 for these cards and they’re still selling like hotcakes!

The Radeon HD 7660D that you find within the A10-A5800K gives similar levels of performance to the Radeon HD 6670 DDR3 or the GeForce GT 630, which come in at between €60 and €70. To recap, coupled with DDR3-2133 instead of DDR3-1600, it would give another 15% or so.

When you combine the 6670 with GDDR5, performance levels take off and with a Radeon HD 7750 they’re doubled compared to the APU alone. On average, Dual Graphics gives a gain of 14.3% with a 6670 DDR3 and 18.2% with 6670 GDDR5: as we have seen, this is very variable depending on the game used and the impact can be negative.
Energy Consumption

We measured the energy consumption of our different configurations in multiple scenarios:
- At idle
- Prime95 (high CPU load)
- Furmark (high GPU load)
- Prime95 + Furmark (high CPU+GPU load)
- F1 2011 (typical game load)

Energy consumption was taken at the 220V socket. Here are the results:

[ Idle / Prime95 ]  [ Furmark / Prime95+Furmark ]  [ F1 2011 ]

There are several important lessons to be drawn. Firstly at idle, the Virgo APUs are on a par with the Intel Ivy Bridges, which is a pretty good thing. In CPU load, the APUs consume significantly more than a Core i3 3220, which was almost on a par with them in the tests. Processor load energy consumption is even higher than for the Core i5 3330, which was a long way ahead of the APUs in the tests. In terms of performance per Watt, a reading AMD has long cherished, the APUs (and indeed Piledriver in general) don’t do all that well.

Graphics energy consumption in Furmark is also higher than with the Intel solutions, but performance is also higher and may therefore justify the difference. On our last graph, typical energy consumption in F1 2011 at 1920 x 1080, once again the energy consumption of the APUs isn’t all that good. We have added, for information, the energy consumption of a Core i3/HD 6670 GDDR5 pairing in this title. While more expensive than the A10-5800K, this combination does give better performance for 20 Watts less.


The energy consumption of entry level graphics cards is quite high given the performance obtained.

Overclocking

The K in the name of the two processors that we have tested today indicates that their multiplier is unlocked. Good news!


Our first tests weren’t very fruitful however, largely because of the base voltage used by our A10-5800K: 1.416V. Under these conditions we obtained a clock of 4.4 GHz with air cooling by pushing voltage up to 1.46V, a score it will probably be possible to improve with a bit of tinkering.

Note also another positive point: our motherboard (and at least its Asus equivalent) allows you to import XMP timings automatically. While AMD trumpets its own AMP timings, in practice our card managed to load an XMP profile (correctly). This is good news and we hope that with DDR4, JEDEC will finally standardise this sort of profile!

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