phxflyer Posted June 22, 2014 Share Posted June 22, 2014 I know it's still early for the Broadwell CPU, but I'm shopping for a new PSU at this time and am planning on getting the Broadwell when it comes out so I would like to make sure it will be compatible. Any ideas what will work and what won't? If it says "Haswell" compatible do you think it will also be "Broadwell" compatible? (My PC Specs show a PCP&P PSU but my wife is running a Corsair 650TX and I plan on using a Corsair PSU in my new build. That's why I'm posting here.) Link to comment Share on other sites More sharing options...
jameyscott Posted June 22, 2014 Share Posted June 22, 2014 The reason they say Haswell compatible is because of the low idle voltage c-states like C7. No matter the PSU it will be compatible as long as it is ATX compatible. You may have to turn a setting or two off in the bios (Such as C7 or C6, but no matter what any PSU you buy will be Broadwell compatible. This is the same thing with Haswell. Any PSU would work, but you have to turn C7 and sometimes C6 off so that when you went into a low idle voltage state, you wouldn't have to completely restart your computer. Link to comment Share on other sites More sharing options...
phxflyer Posted June 23, 2014 Author Share Posted June 23, 2014 Thanks for the quick reply. I would have really been surprised if everyone installing the Broadwell CPU would also have to buy a new PSU as well as a new motherboard. The PSU manufacturers would have an awful lot of old units sitting on the store shelves come November. I'm not an electrical guru so even though I know about the need for a Z97 motherboard, I wasn't sure if the electrical requirements would be handled there or in the actual PSU. I can't find the definition for VCCST (or at least the ST part) so I'm not sure what needs to be updated. If anyone else has a different idea on this, please go ahead and post it. Right now, this seems like a good answer. Link to comment Share on other sites More sharing options...
phxflyer Posted June 24, 2014 Author Share Posted June 24, 2014 I had my question answered by another party. Seems the power restrictions will apply to the motherboard, not the PSU. This is the first article I've found that addresses the question. Your response was correct and this may explain it... http://wccftech.com/intel-broadwell-haswell-refresh-platform-compatible-9series-chipset-power-supply-ratings-imposed/ Link to comment Share on other sites More sharing options...
jameyscott Posted June 25, 2014 Share Posted June 25, 2014 Sorry, I meant to get back to you about that. Yeah, Broadwell will only work with (X)97 boards because the voltage regulator that was put onto Haswell is being taken back off when it comes to broadwell. I believe that DC still has it on chip though, so if there is an update from the manufacturer, some Z87 boards will be DC compatible. Link to comment Share on other sites More sharing options...
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