Featured Articles

Broadwell 14nm desktop comes late in Q2 2015

Broadwell 14nm desktop comes late in Q2 2015

A while ago we mentioned that Broadwell won’t show up in the desktop space this year and we got it right.…

More...
Android Wear installed on 10.000+ phones

Android Wear installed on 10.000+ phones

Android Wear should be one of the first steps towards a wearable revolution and so far it is off to a…

More...
AMD A8-7600 Kaveri APU reviewed

AMD A8-7600 Kaveri APU reviewed

Today we'll take a closer look at AMD's A8-7600 APU Kaveri APU, more specifically we'll examine the GPU performance you can…

More...
Samsung launches 850 Pro series SSDs

Samsung launches 850 Pro series SSDs

Samsung launched a new SSD line-up today and it is based on the Korean giant’s cutting edge 3D vertical NAND (V-NAND).

More...
EVGA GTX 780 Classified reviewed

EVGA GTX 780 Classified reviewed

The EVGA GTX 780 Classified has been dethroned as the company’s fastest non-Titan card following the introduction of the GTX 780…

More...
Frontpage Slideshow | Copyright © 2006-2010 orks, a business unit of Nuevvo Webware Ltd.
Tuesday, 02 April 2013 13:04

AMD APUs might have issues

Written by Slobodan Simic

 amd aseries logo

Updated: Not an issue but a good design decision

While testing AMD's A10-5800K APU, Xbitlabs.com discovered a rahter interesting thing that might be a real problem for AMD APUs as, at least some of them, might have a problem related to the TDP and downclocking.

According to Xbitlabs.com, their AMD A10-5800K sample was behaving rather strangely and in some screnarios dropped way below its 3.8GHz base clock. As you already know the A10-5800K has a base clock of 3.8GHz while it can turbo up to 4.2GHz.

While putting the APU under high multithreaded load, the clock speed ended up at 3.4GHz, which is way below the base 3.8GHz clock. The reason apparently lies in TDP as when it exceeds its default level, the APU drops its base clock. Xbitlabs.com noticed the problem in Linpack benchmark as well as in various video encoding apps and 3D renderers showing that the APU delivered lower performance than expected. Strangely enough, the drop does not happen when APU is forced to work without AMD Turbo Core, but the APU is then locked at 3.8GHz.

According to Xbitlabs.com, AMD is quite aware of the problem but notes that it occurs in very rare cases under loads that are not typical for client microprocessors, so an average user will not notice it.

It is not a big of a deal as benchmarking will definitely put much more strain on the APU or CPU than any average user will ever do and as soon as TDP drop below the treshold it should go up to at least its base clock.

You can check out more here.

Update:

We have been contacted by AMD's Public Relations Manager, Peter Amos, stating that the graceful clock throttling via the Turbo Core Technology when TDP is exceded by benchmarks in an unrealistic scenario is indeed a good design decision rather than issue. The original Xbitlabs.com has also been updated accordingly.

 

Last modified on Thursday, 04 April 2013 12:57
blog comments powered by Disqus

 

Facebook activity

Latest Commented Articles

Recent Comments