jonnyGURU Forums
Home Site Search Reviews Articles Contest Links PSU FAQs  

Go Back   jonnyGURU Forums > Site and Forum Topics > Testing Methodology Discussion

Testing Methodology Discussion Questions and comments regarding the testing methodologies used on

Thread Tools Display Modes
Prev Previous Post   Next Post Next
Old 05-25-2013
jonnyGURU's Avatar
jonnyGURU jonnyGURU is online now
Site Founder
Join Date: Oct 2006
Location: jonnyGURU forums, of course!
Posts: 14,247
Thanks: 437
Thanked 1,610 Times in 997 Posts
Default Intel's Haswell testing methodology

So I've seen a lot of companies posting that their group regulated PSUs are "Haswell ready". Sure.. anything is Haswell ready if you disable C7 sleep state in the BIOS, but that doesn't meet Intel's definition of Haswell ready, so it's sort of misleading.

If any of you reviewers with load testers want to duplicate Intel's testing for Haswell:

Put 0.1A on +12V1.
Put 0.05A on +12V2.
If the PSU has a single +12V rail, 0.15A load on the +12V does the same thing.
Put the maximum load on the +3.3V and +5V.
The way I calculate this is to take the maximum and divide by 4.15 and then divide by 2.
For example: Max combined for +3.3V and +5V is 150W. (150/4.15)/2=18A per rail.

A pass is when all voltages are within 5%. Typically, the PSU, if group regulated, will go beyond 12.6V.

I've found that even if the load on the non-primary rails is a more realistic lower load, like 5A per rail, the PSU's voltages will be in spec, but if the load suddenly changes, like a drop in the +3.3V and +5V or a sudden rise in the +12V, the PSU may shut off. This emulates going into or coming out of sleep state.

Good luck!
Rest in peace Mike Clements, aka "Yellowbeard"

Rest in peace Joerg Theissen, aka "GI Joe"
Reply With Quote
The Following 2 Users Say Thank You to jonnyGURU For This Useful Post:
crmaris (05-26-2013), Tazz (05-25-2013)

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT -4. The time now is 07:09 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Copyright © 2000 -