Corsair CX600M routed correctly on MSI Z87-G43 motherboard but will not turn on

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Peppercornflakes

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Jun 16, 2014
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I recently have been building a computer and reached the stage of cable connecting. I followed the video tutorials which were offered from the MSI motherboard but the power still refuses to turn on. All cables seem to be connected properly from the 24 pin, the 8 pin and everything else. Front panel cables have been tried out in many different orientations but yield no luck.

Motherboard: MSI Z87-G43
Power Supply Unit: Corsair CX600M modular
Case: BitFenix Neos (White)
 
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Dark Lord of Tech

Dark Lord of Tech

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Aug 18, 2009
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The power supply isn't the greatest . has poor capacitors and it's not 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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jonnyguru

jonnyguru

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Nov 30, 2006
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That has absolutely nothing to do with the OP's issue. "Poor capacitors" aren't a reason why a PSU would not start, even if it's DOA. Capacitor quality will only effect longevity. and Haswell compatibility isn't a reason a PSU won't start. It only effects how the mobo will come out of sleep mode.

I agree with Alex Kelly. Test the PSU sans the rest of the build as per the video. If you can get the PSU to start by itself, then you have something else wrong. i.e. Motherboard grounded out somewhere, power switch on chassis hooked up wrong, etc.
 
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