Problem connecting my PSU to mobo - need help

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FrancoisG

Commendable
Apr 3, 2016
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1,510
Hey guys,

That's the CPU 8 pin connector of my Motherboard (MSI mortar B150m) : http://hpics.li/0f3b98a

That's the CPU 4x2 pin connector of my PSU (Fortron Hyper M 700) as posted on their website : http://hpics.li/cafd42c

But in real the PSU 4x2 pin looks like that : http://hpics.li/59518f1
That means the left 4 pin matches the symbol, but the right 4 pin doesn't as there are no squares (ie no ground)
Note that although the right 4 pin doesn't match the symbols, I can actually plug it in...

Since it's an hybrid alimentation, I could set-up another cable with a 4 pin connection to replace the left one : http://hpics.li/47419a5

But not only does this solution add another cable to my already crowded tower, I am also concerned about whether or not both cables will have the same output from the PSU...
I am pretty sure they don't.

So my questions to you experts:

1. Could this be a fabrication defect from the PSU ?
I find it hard to believe that a manufacturer would make such a mistake... :(

2. Probably a silly question, but is it okay to connect the left pin to the CPU even though the symbols don't match ? (again, the symbols don't match but I can plug it in)

3. Is it okay to replace the black cable with the white cable (as depicted in my last photo) ?

I hope my explanations were clear enough.
I am definetely looking forward to some help from you guys !

Thanks
 
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FrancoisG

Commendable
Apr 3, 2016
5
0
1,510
Mmh... connecting the wrong cables scares me more than not connecting enough.

Meanwhile I read this article : http://www.overclock.net/a/gpu-and-cpu-power-connections

It says the following :

"The CPU power connector supplies power to the transistors that control and regulate the voltage that the CPU uses. If an 8 pin CPU connector is needed, but you use a 4 pin instead, you will starve these rectifiers. This current starvation will not only cause read errors and blue screens, but can also cause the rectifiers and CPU to overheat and burn up. The +12 volt CPU power connection is used only for the CPU, it does not supply power to the memory; the memory power rectifiers get their power from a +5 volt line. There are very few CPUs that normally need the extra power the 8 pin EPS12V connector will provide. For most power users, the 4 pin ATX12V connector is sufficient for the needs of most CPUs. If your CPUs wattage rating, plus over-clocking needs is estimated to be close to 155 continuous watts, use a Power Supply with an 8 pin EPS12V connector to be safe. Of Course; If your Power Supply already has an 8 pin EPS12V connector, and your main board has that receptacle, it's stupid not to use it. But if you do not need the functionality of the 8 pin EPS12V connector, don't go out and buy another Power Supply just so you can fill in the extra 4 holes on your main board's 8 pin CPU power receptacle. If you do need the functionality of the 8 pin EPS12V connector, but a 4 pin ATX12V connector will supply more than enough power, a 4 pin to 8 pin adaptor is acceptable to use."

So I'll probably just use 1 pin and buy an adapter : http://www.newegg.com/Product/Product.aspx?Item=N82E16812201005
 
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Dark Lord of Tech

Dark Lord of Tech

Retired Moderator
Aug 18, 2009
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That's a waste , the 8 pin CPU power cable can't go into the board wrong you latch it.

7Lw5W3o.jpg
 
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FrancoisG

Commendable
Apr 3, 2016
5
0
1,510
Obviously you haven't read half of my first post...

My PSU doesn't have a 8 pin connector : it's 2x4 pin connector... And one of the two pins doesn't match the website description NOR the motherboard requirements (as is rightly shown on your picture)
 
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FrancoisG

Commendable
Apr 3, 2016
5
0
1,510
man, I appreciate you trying to help and all but please take 3 minutes to read my post before rushing into an answer
1. your wasting both our time
2. you are drastically reducing my chances to get a real answer from someone...

In the table you sent there is a '-' instead of a 'number' which means 'NONE'
That is why I took the time to share THIS screenshot in my first post : http://www.hostingpics.net/viewer.php?id=328407PSUCPUpower.jpg

Again... NOT a 8 pin CPU connector, but a 2x4 pin CPU Connector
 
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Tbonius

Tbonius

Distinguished
Aug 3, 2007
178
4
18,715
I see your power supply is modular, the 4+4 cable that you showed, does it plug into one of the 8 pin connectors(blue) on your power supply? Because those connectors are configured like the one on your motherboard.
 
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