PSU with no 4-pin connector to motherboard


  1. envy28
    Posts : 73
    Windows 7 64bit
       New #1

    PSU with no 4-pin connector to motherboard


    Hi

    I just brought a new graphics card and a PSU (Corsair TX850). Everything my old PSU was connected to now has my new PSU, except for one 4-pin white box on the top right hand of my motherboard (Biostar TH55B HD) as my new PSU does not come with a 4-pin cable.

    My motherboard can be seen here: http://www.biostar-usa.com/upload/Mo.../b20100111.jpg

    Not sure what that 4-pin connector is for, all it says above it is ''Power Indicator'' and below it ''ATXPWR2''.

    So was just wondering if it is necessary to have the right connector connected to it before I turn on my PC.

    Thanks
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  3. DocBrown
    Posts : 9,606
    Win7 Enterprise, Win7 x86 (Ult 7600), Win7 x64 Ult 7600, TechNet RTM on AMD x64 (2.8Ghz)
       New #2

    What does the Corsair TX850 manual say ? Is there a 8pin split connector coming out of the PSU ?
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  4. bassfisher6522
    Posts : 2,240
    Windows 7 Ultimate 64 bit
       New #3

    That is your 4 pin cpu power connection. Have a look here.....click on the photo and then see photo 3.

    Newegg.com - BIOSTAR TH55B HD LGA 1156 Intel H55 HDMI Micro ATX Intel Motherboard
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  6. Dwarf
    Posts : 9,582
    Windows 8.1 Pro RTM x64
       New #4

    That connector supplies power to the voltage regulators, which in turn supply power to the CPU. So, it is very important that this is connected. From your PSU specs, I note that it doesn't have a 4-pin connector, but it does have an 8-pin arranged as 4+4. You need to plug one of these (whichever one fits) into this socket.
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  7. bassfisher6522
    Posts : 2,240
    Windows 7 Ultimate 64 bit
       New #5

    This should explain your cables on the PSU. As DocBrown pointed out it has one 8 pin connector that splits into 2 4 pin connectors. Some newer mobo's use the 8 pin connection instead of the 4 pin. Check out the specs here.....

    Newegg.com - CORSAIR Enthusiast Series TX850 V2 850W ATX12V v2.31/ EPS12V v2.92 80 PLUS BRONZE Certified Active PFC High Performance Power Supply
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  8. envy28
    Posts : 73
    Windows 7 64bit
    Thread Starter
       New #6

    bassfisher6522 said:
    This should explain your cables on the PSU. As DocBrown pointed out it has one 8 pin connector that splits into 2 4 pin connectors. Some newer mobo's use the 8 pin connection instead of the 4 pin. Check out the specs here.....

    Newegg.com - CORSAIR Enthusiast Series TX850 V2 850W ATX12V v2.31/ EPS12V v2.92 80 PLUS BRONZE Certified Active PFC High Performance Power Supply
    Thanks mate, figured it out.
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