Question Psu 8 pin doesnt fit motherboard

Feb 16, 2020
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Hello all! New member here but ive been visiting this site and it's forums for the longest time. After several years i've been able to save up to get some new parts that I am planning to use with an older psu

https://www.techradar.com/reviews/pc-mac/pc-components/cases-cooling/power-supplies/coolermaster-silent-pro-gold-800w-717076/review

Ive purchased an x570-A pro which has an 8 pin (cpu pwr1) and an extra 4 pin (cpu pwr2). Unfortunately the shapes for the last 2 slots for the 8 pin cable dont match up. I got a ryzen 3600 and a gigabyte 2070 super gaming oc 3x 8g to along with the board. I should mention that i dont mess with settings/overclock. Do i need to change psu or can i just fill up the 8 pin with whatever connectors fits? (Not the pcie modular but the ones coming direct from the psu). Thanks for any help!
 
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COLGeek

Cybernaut
Moderator
You really only need to connect the 8-pin (CPU PWR1) connection. You can safely not use the additional 4-pin connector.

Do not try jamming a PCIe (6+2-pin) connector into either CPU power connection.

Your PSU should have an appropriate 4+4 or 8-pin connector to attach to the motherboard (along with the 24-pin main power connection).

M/B 20 + 4 pins x1CPU 4 + 4 pins x1

 

Darkbreeze

Titan
Moderator
That Silent Pro Gold 800w unit is about 10 years old. You shouldn't be using it with ANY system to be honest. If you value the hardware you just saved up several years to get, you would not use that hardware with that power supply.

It is a five year warranty unit, meaning it is already, potentially, five years, and certainly at least three years, past the point where the manufactuer believed the unit could remain reliable. It might have been a decent unit when it was new, but that was a VERY long time ago. I suspect using this unit, and it's highly outdated platform, with your new hardware, is going to result in some screaming and fair amount of tears before it's all said and done.
 
Feb 16, 2020
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You really only need to connect the 8-pin (CPU PWR1) connection. You can safely not use the additional 4-pin connector.

Do not try jamming a PCIe (6+2-pin) connector into either CPU power connection.

Your PSU should have an appropriate 4+4 or 8-pin connector to attach to the motherboard (along with the 24-pin main power connection).

M/B 20 + 4 pins x1CPU 4 + 4 pins x1

Thank you! I thought the cables coming direct from the psu is for the cpu only? Also the 4+4 fits but the shapes for the last 2 (on the left most) dont match up. Is that okay? If i did want to plug something into the cpupwr2 slot could i use the.modular cables then? Again thank you so much for the reply!
 
Feb 16, 2020
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No, you use the ones marked EPS or CPU. They should be 4+4 connectors, not 8 pin or 6+2 connectors marked PCI.

You are trying to use the wrong connectors.
Thank you! I appreciate the help! So, it doesn't matter if the shapes dont match up as long as they plug in without any force?What happens if nothing is plugged into the other 4 slot? I forgot to mention there is also an m.2 connected to the board as well. If it makes any difference for the power needed. What would you suggest as a replacement? Just enough to run everything safely! Thanks again!
 
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Feb 16, 2020
5
0
10
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That Silent Pro Gold 800w unit is about 10 years old. You shouldn't be using it with ANY system to be honest. If you value the hardware you just saved up several years to get, you would not use that hardware with that power supply.

It is a five year warranty unit, meaning it is already, potentially, five years, and certainly at least three years, past the point where the manufactuer believed the unit could remain reliable. It might have been a decent unit when it was new, but that was a VERY long time ago. I suspect using this unit, and it's highly outdated platform, with your new hardware, is going to result in some screaming and fair amount of tears before it's all said and done.
Any suggestions? Hopefully not too pricey? =)
 

Darkbreeze

Titan
Moderator
So, yes, as long as you are using the correct EPS or CPU connector, 4+4 pin, for the 8 or 4 pin EPS 12v supplemental power socket on the motherboard, then it doesn't matter if you have a different shape so long as it fits in the hole without any force. A square connector with half round on one side for example, is ok in a square hole. You can't obviously put a square connector in a hole meant for one that is half round however. If it is a 4+4 pin, then it belongs plugged into the CPU power socket on the board, or split in half to use for the other four pin CPU socket if your PSU has two 4+4 EPS/CPU power connectors. If it does not, then the second four pin isn't really all that necessary unless you are doing some over the top overclocking.

As far as replacement models are concerned, that would depend on what you can reasonably budget for a power supply and what country you are in, because what is available and prices are varied tremendously from region to region.
 
Feb 16, 2020
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So, yes, as long as you are using the correct EPS or CPU connector, 4+4 pin, for the 8 or 4 pin EPS 12v supplemental power socket on the motherboard, then it doesn't matter if you have a different shape so long as it fits in the hole without any force. A square connector with half round on one side for example, is ok in a square hole. You can't obviously put a square connector in a hole meant for one that is half round however. If it is a 4+4 pin, then it belongs plugged into the CPU power socket on the board, or split in half to use for the other four pin CPU socket if your PSU has two 4+4 EPS/CPU power connectors. If it does not, then the second four pin isn't really all that necessary unless you are doing some over the top overclocking.

As far as replacement models are concerned, that would depend on what you can reasonably budget for a power supply and what country you are in, because what is available and prices are varied tremendously from region to region.
Hello Dark,
https://awesome-table.com/-KrkkVbKZR_HZ2x8lsHk/view

Here is a list and their prices in Philippine pesos. To recap it will be
Ryzen 3600
Gskill 16gb 3600mhz
Gigabyte 2070 super gaming OC
samsung 970 m.2
samsung sata ssd
1 tb hdd
Around 3 rgb and 1 regular case fan
1 Optical disc drive
-No other lighting effects
Budget would preferably be below usd 200 (around Php 10,000) Many thanks!
 

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