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is 620W enough for this build?

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  • Seasonic
  • Build
  • Systems
Last response: in Systems
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October 17, 2014 7:42:01 AM

Hey, so i ordered the Seasonic S12II-620 PSU and wondered if it's enough for my build.
I read a bunch of reviews and all were positive for good quality for great price.

This would be my final build
Motherboard: Asus Gryphon Z87
Power Supply: Seasonic S12II-620
CPU: Intel i7 4770K, multiplier at x43=4,3Ghz and Voltage=1,255 at max(turbo boost mode)
CPU Cooler: Noctua NH-U9B
GPU: MSI Geforce GTX 970
Memory : Team Elite DDR3 2gb(x4) 1333mhz
SSD: Samsung 840 PRO 128gb
HDD: ATA ST31000528AS SCSI 1TB
Case: Fractal Design R4

Thanks.

More about : 620w build

October 17, 2014 7:50:40 AM

Yep! More than though power. Regarding your build...

CPU Cooler - Fine and all, but you might as well step up to the Noctua NH-D14 or D15. Other than the D14 / D15, look toward the Hyper 212 EVO for much cheaper.
MEM - "slow" being DDR3-1333. Look toward DDR3-1600 1.5v CL9 (or lower).

Enjoy that build!
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October 17, 2014 7:51:26 AM

Yes, recommended PSU for the GTX 970 is 500w
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October 17, 2014 7:59:25 AM

That PSU isn't Haswell compatible.

When an Intel Core (i3, i5, i7) processor is idle, it goes into a sleep state that requires less power than when the CPU is active. Since the motherboard voltage regulation modules that provide power to the CPU gets their power from the power supply's +12V rail, these sleep states can dramatically reduce the load on the power supply's +12V rail.

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.

While we are still working with Intel on the details of the testing methodology they use to check PSUs for Haswell compatibility, it is already known that a power supply that uses DC to DC for the non-primary rails (the +3.3V and +5V) will not have an issue with the new low power sleep states. This is because a DC to DC buck converter is used to convert +12V to +3.3V and +5V. This means that no matter what load the CPU puts on the power supply, there will always be a load on the +12V because the +12V is required to provide power to +3.3V and +5V.

Corsair utilizes this DC to DC technology in most of their power supplies. Starting with the CX750 and CX750M and moving all of the way through the GS Series, TX and TX-M Series, the HX Series, both the AX Series Gold and AX Series Platinum, and the new AXi Series. So whatever your budget, if you choose Intel's new Haswell processor and wish to utilize the new, low power C7 sleep state, Corsair has a power supply for you.


corsair.com
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October 17, 2014 8:58:11 AM

sadams04 said:
Yep! More than though power. Regarding your build...

CPU Cooler - Fine and all, but you might as well step up to the Noctua NH-D14 or D15. Other than the D14 / D15, look toward the Hyper 212 EVO for much cheaper.
MEM - "slow" being DDR3-1333. Look toward DDR3-1600 1.5v CL9 (or lower).

Enjoy that build!


Thank you, this is not a brand new build it's all upgrades from a pc i bought 4 years ago, only thing that's stock anymore are the memory cards and HDD. HDD is used for storage only so that i won't upgrade and the memory i am renewing probably in a few months since i can't afford to buy everything at once. The cooler i also don't want to upgrade unless it's completely necessary since it's only half year old.
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October 17, 2014 9:26:49 AM

SR-71 Blackbird said:
That PSU isn't Haswell compatible.

When an Intel Core (i3, i5, i7) processor is idle, it goes into a sleep state that requires less power than when the CPU is active. Since the motherboard voltage regulation modules that provide power to the CPU gets their power from the power supply's +12V rail, these sleep states can dramatically reduce the load on the power supply's +12V rail.

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.

While we are still working with Intel on the details of the testing methodology they use to check PSUs for Haswell compatibility, it is already known that a power supply that uses DC to DC for the non-primary rails (the +3.3V and +5V) will not have an issue with the new low power sleep states. This is because a DC to DC buck converter is used to convert +12V to +3.3V and +5V. This means that no matter what load the CPU puts on the power supply, there will always be a load on the +12V because the +12V is required to provide power to +3.3V and +5V.

Corsair utilizes this DC to DC technology in most of their power supplies. Starting with the CX750 and CX750M and moving all of the way through the GS Series, TX and TX-M Series, the HX Series, both the AX Series Gold and AX Series Platinum, and the new AXi Series. So whatever your budget, if you choose Intel's new Haswell processor and wish to utilize the new, low power C7 sleep state, Corsair has a power supply for you.


corsair.com


Thanks for replying, i read on multiple places that this only affects if you hibernate and you fix it by simply disabling hibernation from cmd or disabling c6/c7 in bios. this would be idle for me since i never used hibernation or sleep anyway, with an ssd i can just turn of pc and turn it back on.
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October 17, 2014 9:29:48 AM

The you should be fine.
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October 17, 2014 10:03:51 AM

SR-71 Blackbird said:
The you should be fine.


okay, have you ever heard about this or done it? some people also say that some psusis that aren't certified will still work with a haswell cpu.

so do you know for sure that the psu will work if i disable c6/c7?
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October 17, 2014 12:08:31 PM

Yes it will be fine , it's rare that a problem arises after you disable.
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October 17, 2014 2:18:02 PM

SR-71 Blackbird said:
Yes it will be fine , it's rare that a problem arises after you disable.


Ok, thank you very much for your help.
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