For the reduction in power consumption and TDP,the performance difference is not massive when compared to the A10-5800K:

http://hexus.net/tech/reviews/cpu/47257-amd-a10-5700/

Idle power consumption is better than even a Core i3 3225 and the IGP has much better performance/watt.

Very interesting. Clearly AMD is trading some performance for better power characteristics. Did it hit the right spot?

According to the review their testing system draws 27W at idle, versus 31W with the A8-5600K. Given that SPCR measured 22W from their system with the A8-5600K, it is to be supposed that SPCR would measure 19W at idle, assuming they use the same motherboard. Industry leading, indeed.

Having said that, the Intel DH67BL draws less than 19W with e.g. the i3-2100. I wonder what sort of power figure is possible with this AMD chip if someone were to build an efficient board like Intel did for the H67.

This review is a great read, thanks for sharing.

I definitely had this model in mind if I were going to build an FM2 system, but didn't expect the difference to be so significant in practice. That's great.

i wish they would've posted some cpuz screens or at least commented on the voltages, i have a feeling that simply undervolting an a10-5800k won't bring it down to similar power levels. if it was that easy you would assume amd would have more stock, especially since they sell for the same price.
i'm worried these 65w chips will be as elusive as the 65w a8 llanos.

can't wait for the spcr review!

I have one sitting unopened on my desk. I won an A10-5800K in a contest and was sent the 5700 by mistake. So they are definitely available.

NyteOwl
Please, post here CPU-Z screenshot, after you install this CPU. I think everyone wants to now it's Vcore.

At least in the UK the A10-5700 seems easily available and is actually slightly cheaper than a A10-5800K.

good idea!

i know tigerdirect sell them, but not newegg. and they're definitely not available in Australia yet.

i'm kind of leaning toward the a6-5400k right now, the value is unbelievable for an everyday and light gaming machine. and at least one person has managed to use it for some decent emulation, which would be the most taxing task i use mine for.

An a6 system could be a nice, cheap HTPC.

Having said that, I read that Xbit labs measured less than ten Watts from an i3-2100T with the Zotac H67-ITX back in 2011, which seems to me a fantastic figure. So fantastic in fact that I'm starting to doubt the veracity of the number.

And indeed a secondary source throws more weight on this suspicion; they measured 21.9W at idle for the same system, although they do not indicate if they measured before or after the PSU. But even if they measured before the PSU, assuming the PSU is 75% efficient at this load, the system power draw would be over 16W.

They tested the Intel Processors on a z77 motherboard which is not a very power efficient chipset. I have no doubt if they had used an H67, H77, or H75 the Core I3 would have had lower idle power consumption. I find that with systems with very low power consumption the motherboard choice has a bigger impact than the processor choice in terms of idle power consumption.

The FM2 motherboard used was a high end A85X, which might not be as efficient as lower end motherboards either. So until the lower end A55 and A75 motherboards are tested,which tend to have more basic VRM sections,we can't say. Moreover,there was a 13% reduction in power consumption at idle with the A10-5700, when compared to the 100W TDP A8 and A10 samples tested on the same motherboard. Both Trinity and Llano have been shown to have good idle and low load figures by reviewers and users alike,so there is nothing out of the ordinary there TBH. I have both the Core i3 2100 and and A6 3670K myself - the latter does not have poor power consumption at idle.

They tested the A10-5800K and the A10-5700 with an A75 based motherboard which uses a 6 phase VRM:

http://hexus.net/tech/reviews/mainboard ... -m/?page=8

Power consumption dropped by 1W at idle,and around 5W under CPU and 3D load for the A10-5700. I would expect power consumption to drop with the mini-ITX A75 based motherboards, and a number of the lower end A55 and A75 motherboards have 4 phase and 5 phase VRMs and PCBs which are smaller than mATX.

Has anyone tried using a A10 5800k and underclocking it to emulate a A10 5700? The 5700 is non existent in certain parts of the world and it definitely wont reach our shores.

I was intending to get a 5700 in a ISK100 but due to availability i might just end up with an underclock + undervolt 5800k. I'm just worried if the PSU can handle it as its rated for 80w.