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Slightly Confused, Motherboard needs 2 8-Pin Cables (Corsair RM 750 PSU)

Shin555
By Shin555
in Power Supplies
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Posted

Hi,

So I'm upgrading my PC and 3 of the main components are as follows:

Motherboard: MSI Z87 MPower

CPU: Intel 4770k

PSU: Corsair RM 750w

The problem that I am having is that the motherboard wants 2, 8-Pin Power connectors (as well as the 24 pin).

I only got 1 8 pin CPU cable. There are no 4+4 cables. The only cables are your Molex, Fan power, and PCI-e (6+2).

I was wondering, since the PSU is fully modular, do they expect me to use a PCI-e cable, and put it into the CPU slot on the PSU?

Or would I need to purchase a splitter or source my own 8 pin CPU cable?

My last Motherboard only had the one 8 Pin required, I was a bit dumbfounded to find this one needing two as I genuinely didn't expect that.

Any advice/help would be really appreciated.

Thanks.

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No, do NOT use a PCIe Power Cable. It will fry the board and CPU. Only one 8pin is required.

Main Rig: CPU: AMD Ryzen 7 5800X | RAM: 32GB (2x16GB) KLEVV CRAS XR RGB DDR4-3600 | Motherboard: Gigabyte B550I AORUS PRO AX | Storage: 512GB SKHynix PC401, 1TB Samsung 970 EVO Plus, 2x Micron 1100 256GB SATA SSDs | GPU: EVGA RTX 3080 FTW3 Ultra 10GB | Cooling: ThermalTake Floe 280mm w/ be quiet! Pure Wings 3 | Case: Sliger SM580 (Black) | PSU: Lian Li SP 850W

 

Server: CPU: AMD Ryzen 3 3100 | RAM: 32GB (2x16GB) Crucial DDR4 Pro | Motherboard: ASUS PRIME B550-PLUS AC-HES | Storage: 128GB Samsung PM961, 4TB Seagate IronWolf | GPU: AMD FirePro WX 3100 | Cooling: EK-AIO Elite 360 D-RGB | Case: Corsair 5000D Airflow (White) | PSU: Seasonic Focus GM-850

 

Miscellaneous: Dell Optiplex 7060 Micro (i5-8500T/16GB/512GB), Lenovo ThinkCentre M715q Tiny (R5 2400GE/16GB/256GB), Dell Optiplex 7040 SFF (i5-6400/8GB/128GB)

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I think you just use the one CPU 8 pin, I would not plug anything else into the second power port, may have different voltages etc, just a bad idea. 

Spoiler

Corsair 400C- Intel i7 6700- Gigabyte Gaming 6- GTX 1080 Founders Ed. - Intel 530 120GB + 2xWD 1TB + Adata 610 256GB- 16GB 2400MHz G.Skill- Evga G2 650 PSU- Corsair H110- ASUS PB278Q- Dell u2412m- Logitech G710+ - Logitech g700 - Sennheiser PC350 SE/598se


Is it just me or is Grammar slowly becoming extinct on LTT? 

 

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No, do NOT use a PCIe Power Cable. It will fry the board and CPU. Only one 8pin is required.

Ah! Good to know, I was reading a bit about that so was hesitant anyway, but needed to double check.

So why is that 2nd port there?

Also, will this degrade my Overclocking (or any) performance at all?

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Ah! Good to know, I was reading a bit about that so was hesitant anyway, but needed to double check.

So why is that 2nd port there?

Also, will this degrade my Overclocking (or any) performance at all?

Well the second pin should just be for more power delivery to the cpu. That being said my z77 Mpower has an extra 6 pin but its just for video cards. I'm not sure if its only for the cpu. 

Spoiler

Corsair 400C- Intel i7 6700- Gigabyte Gaming 6- GTX 1080 Founders Ed. - Intel 530 120GB + 2xWD 1TB + Adata 610 256GB- 16GB 2400MHz G.Skill- Evga G2 650 PSU- Corsair H110- ASUS PB278Q- Dell u2412m- Logitech G710+ - Logitech g700 - Sennheiser PC350 SE/598se


Is it just me or is Grammar slowly becoming extinct on LTT? 

 

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Ah! Good to know, I was reading a bit about that so was hesitant anyway, but needed to double check.

So why is that 2nd port there?

Also, will this degrade my Overclocking (or any) performance at all?

The extra 8 pin is there for extreme overclocking. You shouldn't have to worry about it at all.

Main Rig: CPU: AMD Ryzen 7 5800X | RAM: 32GB (2x16GB) KLEVV CRAS XR RGB DDR4-3600 | Motherboard: Gigabyte B550I AORUS PRO AX | Storage: 512GB SKHynix PC401, 1TB Samsung 970 EVO Plus, 2x Micron 1100 256GB SATA SSDs | GPU: EVGA RTX 3080 FTW3 Ultra 10GB | Cooling: ThermalTake Floe 280mm w/ be quiet! Pure Wings 3 | Case: Sliger SM580 (Black) | PSU: Lian Li SP 850W

 

Server: CPU: AMD Ryzen 3 3100 | RAM: 32GB (2x16GB) Crucial DDR4 Pro | Motherboard: ASUS PRIME B550-PLUS AC-HES | Storage: 128GB Samsung PM961, 4TB Seagate IronWolf | GPU: AMD FirePro WX 3100 | Cooling: EK-AIO Elite 360 D-RGB | Case: Corsair 5000D Airflow (White) | PSU: Seasonic Focus GM-850

 

Miscellaneous: Dell Optiplex 7060 Micro (i5-8500T/16GB/512GB), Lenovo ThinkCentre M715q Tiny (R5 2400GE/16GB/256GB), Dell Optiplex 7040 SFF (i5-6400/8GB/128GB)

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