MSI Z97 MPower Max AC has a extra PCI-E connector to the mother boards but I have no way to connect it to PSU.

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kosanovskiy

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Jun 28, 2013
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Here are my specs:

CPU: 4670k
GPU: 2x MSI GTX 970 Gaming 4G (SLI)
Mobo: MSI Z97 MPower Max AC
RAM: G.Skill Ripjaws X Series F3-2133C9D-16GXH 1.6V
CPU Cooler: Hyper 212 EVO
PSU: EVGA Supernova G2 750 80+ Gold
Case: Corsair 300R
SSD: 2x250GB Evo 850, 1x850 Pro
Case Fans: 5x Noctua NF-P14
Monitor: BenQ GW2765HT 27'' 2560x1440 (connected via display port which arrears to be having his own issues)
OS: Win8.1 installed on the 850 Pro

Now that I completed my build I have a issue my mobo has 4 power connectors, I have attached the image to help explain what I mean. 1 x 24pin from PSU (JPWR1), 1 x 8pin from PSU (JPWR2), 1 x 4pin from PSU (JPWR3), and a PCI-E/VGA from PSU (JPWR4).

Here is the image connector location.

Problem is that I'm running SLI and already used all the connection ports to the PSU since each mobo requires 2 PCI-E power connectors and there are total of 4 on my PSU. Also I used both of the CPU connectors as well, so I'm wondering in how much of a danger am I that the I OC CPU to 4.3GHz +1.25V and my GPU's to 1470Mhz on each one. Also the RAM is in XMP at 2133Mhz. I know that connection port is meant to add stability but my system works fine right now but I'm worried if it may fail in the future because I have no way to connect another PCI-E power cable to my PSU.

Is there maybe a Y-Splitter for a 8pin PSU connector so that way I can just add another cable or am I at my mobos mercy now?

Thank you.
 
Solution
SkylerJacobs
Only 24pin on the side of the motherboard and 8 pin (CPU) on the top of the motherboard are required for normal usage. The rest are for additional power in case of Overclocking (extreme). Extreme = something that only LN2 can deal with . The one nearby PCIe slots (JPWR4) is simply PCIe connector for GPU additional power and 4pin next to 8 pin of the CPU is for CPU additional power.

I myself have an ASUS Maximus VII Formula. It also has the extra 4pin CPU connection. I have it plugged in, but it does not make a difference at all to how much i can overclock with the H100i. As stated above, the extra 4 pin CPU, and the 8 pin that is nearby PCIe lanes are for extreme overclocking, and are not required for normal use.
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SkylerJacobs

SkylerJacobs

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Only 24pin on the side of the motherboard and 8 pin (CPU) on the top of the motherboard are required for normal usage. The rest are for additional power in case of Overclocking (extreme). Extreme = something that only LN2 can deal with . The one nearby PCIe slots (JPWR4) is simply PCIe connector for GPU additional power and 4pin next to 8 pin of the CPU is for CPU additional power.

I myself have an ASUS Maximus VII Formula. It also has the extra 4pin CPU connection. I have it plugged in, but it does not make a difference at all to how much i can overclock with the H100i. As stated above, the extra 4 pin CPU, and the 8 pin that is nearby PCIe lanes are for extreme overclocking, and are not required for normal use.
 
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Solution
clutchc

clutchc

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The added PCIe power header JPWR4 is aux power if you run a third gfx card. Normally not even needed then, but nice to have. You're fine as is.
(You'll notice the polarity is reversed on the the aux PCIe header compared to the CPU power header. Don't confuse them)
 
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