Be Quiet!, Fractal Design & Thermaltake Release List of Haswell Compatible PSUs
Fractal Design, Thermaltake, and Be Quiet! all release their list of Haswell compatible power supplies.
Earlier, we heard that Intel's Haswell CPUs might have problems with certain less expensive or older power supplies, because the Haswell CPUs would be too efficient for them. A number of manufacturers have already released their lists with compatible power supplies, and now three manufacturers join in: Fractal Design, Thermaltake and Be Quiet!.
First, Be Quiet! has announced that all of its current power supplies are compatible with the Haswell CPUs. This includes all the models that are currently in production and for sale, but not older units, which might still be on shelves, but are not necessarily compatible. Some older units are mostly compatible, it mentions. The model series that are definitely compatible are: the Dark Power Pro 10, Straight Power E9, Pure Power L8, System Power 7, and Pure Power L7 series (630 W and 730 W).
Moving on, Thermaltake has announced that the Toughpower Platinum (700 W and 600 W), Toughpower Gold (1200 W, 1050 W, 850 W, 750 W, 650 W), Toughpower XT (1475 W, 1375 W, 1275 W), Toughpower (1500 W, 1200 W, 1000 W, 850 W, 750 W), EVO_BLUE 2.0 (850 W, 750 W, 650 W), and SMART M (850 W, 750 W) are all 100 percent compatible with the upcoming Intel Haswell CPUs.
Lastly, Fractal Design has also released a list of Haswell compatible power supplies. The power supplies that it has mentioned as compatible include the Newton R3 (1000 W, 1000 W White, 800 W, 600 W) and the Tesla R2 (1000 W, 800 W, 650 W, 650 W White, 500 W). The Integra R2 lineup (750 W, 650 W, 500 W) have been rated as likely compatible, although the compatibility is questioned since Intel hasn't released any formal testing procedure or minimum qualifications.
i've seen their statement like at least 2 weeks ago. can't remember where though
http://www.tomshardware.com/news/Seasonic-Haswell-Power-Supply,22544.html
So just what is "Haswell compatible"?
Seems like marketing fluff to me. Won't a regular 24 pin PSU with the latest standards work fine?
So just what is "Haswell compatible"?
Seems like marketing fluff to me. Won't a regular 24 pin PSU with the latest standards work fine?
So just what is "Haswell compatible"?
Seems like marketing fluff to me. Won't a regular 24 pin PSU with the latest standards work fine?
What is it new exactly about Haswell that requires "compatible" PSUs?
Edit: Never mind, just read the power states article.
So just what is "Haswell compatible"?
Seems like marketing fluff to me. Won't a regular 24 pin PSU with the latest standards work fine?
There was concern for power supplies supporting the sleep modes for Haswell.
"The new C6/C7 power states on the Haswell-Shark Bay platform will require the system power supply to be able to maintain a minimum current load of 0.05Amps on the CPU exclusive 12V2 rail (0.6W)."
Source
So just what is "Haswell compatible"?
Seems like marketing fluff to me. Won't a regular 24 pin PSU with the latest standards work fine?
I ran into a similar problem a few years ago when I got one of the first Intel processors with an integrated GPU. Without the load of a separate GPU, the PSU wouldn't even stay on for more than a few seconds until I connected an old disk to the power supply, just to add more power usage.
Hopefully the link below helps. Thanks.
http://techreport.com/news/24738/few-psus-support-haswell-c6-c7-low-power-states
Hopefully the link below helps. Thanks.
http://techreport.com/news/24738/few-psus-support-haswell-c6-c7-low-power-states
This is the best answer I could find.
"According to Intel's presentation at IDF, the new Haswell processors enter a sleep state called C7 that can drop processor power usage as low as 0.05A. Even if the sleeping CPU is the only load on the +12V rail, most power supplies can handle a load this low. The potential problem comes up when there is still a substantial load on the power supply's non-primary rails (the +3.3V and +5V). If the load on these non-primary rails are above a certain threshold (which varies by PSU), the +12V can go out of spec (voltages greater than +12.6V). If the +12V is out of spec when the motherboard comes out of the sleep state, the PSU's protection may prevent the PSU from running and will cause the power supply to "latch off". This will require the user to cycle the power on their power supply using the power switch on the back of the unit."
Source
"According to Intel's presentation at IDF, the new Haswell processors enter a sleep state called C7 that can drop processor power usage as low as 0.05A. Even if the sleeping CPU is the only load on the +12V rail, most power supplies can handle a load this low. The potential problem comes up when there is still a substantial load on the power supply's non-primary rails (the +3.3V and +5V). If the load on these non-primary rails are above a certain threshold (which varies by PSU), the +12V can go out of spec (voltages greater than +12.6V). If the +12V is out of spec when the motherboard comes out of the sleep state, the PSU's protection may prevent the PSU from running and will cause the power supply to "latch off". This will require the user to cycle the power on their power supply using the power switch on the back of the unit."
Source[/quotemsg]
Thanks DJChangsta!