News

Haswell Could Have Compatibility Issues With Old Power Supplies

We know Intel’s Haswell is coming within the month or so, June the 4th to be precise, just in time for the Computex 2013 event. One of the main features you may have seen recurring from all the leaks and promotional material is that Haswell will maximise battery left better than Ivy bridge. This mainly refers to idle power consumption as load is going to be similar to Ivy Bridge. These improvements were mainly constructed and implemented for the mobile market to maximise Ultrabook battery life however they will also carry over to the PC platform.

To achieve massive savings in battery life, or power consumption for desktops, the Haswell CPUs are introducing two new idle states – C6 and C7. C6 and C7 allow Haswell to reduce power consumption by a significant amount more than Ivy Bridge. In fact it can drop its current to just 0.05 amps compared to 0.5 amps on Ivy Bridge, this means 10X lower power consumption at idle.

Now where does the power supply compatibility issue come into this? Well if your power supply is old, or cheap, then it may not be able to provide amps as low as 0.05 on the 12 volt rail. This is because entering those C6/C7 states could cause Under Voltage Protection (UVP) to be triggered or the power supply just might not be capable of delivering such a low amount of amps in a clean and stable way. On top of all this current power supply manufacturers don’t report minimum supported amps, only maximum, so it is impossible to tell whose power supplies will support what.

However, it isn’t all doom and gloom because Intel have instructed motherboard vendors to provide a disable C6 and C7 state function in the BIOS so if you do have issues with running those idle states, then you can just disable them and the problem is fixed. Sure you won’t be able to use the extra power savings if you disable C6 and C7 but you will still be able to use your PC in a normal way.

What are your thoughts on C6 and C7?

Source

Ryan Martin

Disqus Comments Loading...

Recent Posts

Still Wakes the Deep 

LIVE THE HORROR: An immersive disaster story aboard a stunningly realised North Sea oil rig,…

3 hours ago

PHILIPS 275V8LA – 27 Inch QHD Monitor

The Philips VA LED display uses an advanced multi-domain vertical alignment technology that gives you…

3 hours ago

EPOMAKER Ajazz AK820 Pro 75% Gasket-mounted Mechanical Keyboard 

【TFT Screen: The Interactive Interface】This 75% mechanical keyboard comes equipped with a TFT Screen, serving…

3 hours ago

Funko Fusion

FANDOM FUSION Play as your favorite characters and wield their unique weapons and skills. Team…

3 hours ago

Shin Megami Tensei V: Vengeance Standard Edition

The Definitive Version of Shin Megami Tensei V - Fully evolved with stunning visuals for…

3 hours ago

Hand Warmers Rechargeable 2 Pack

【Unique Split Design】5200mAh hand warmers rechargeable together with double-sided heating function, split snap swivel design,…

3 hours ago