8-Pin ATX and one 4-Pin ATX connector CPU

[kainlp]

Hi,

 

So i have MSI Z390 MPG GAMING EDGE AC ATX Motherboard and on the motherboard i need one 8 pin and one 4 pin power cable for the CPU, can someone advise what power supply to buy, an the moment i have Corsair TX850M 850watt , i am looking for something similar but with the cables required by my motherboard. ( PCU is i7-9700K )

 

Thank you.

[mariushm]

You don't NEED to have both inserted. The 4 pin connector is optional.

 

The 8 pin EPS connector is enough to provide a processor with over 300 watts of power. The extra 4 pin cable is just for those who are really into heavy overclocking and it has some minimal benefits besides that (like less current through wires means the wires will heat less, there's less voltage drop on cables... but really they're tiny benefits).

 

The 9900k peaks at around 170 watts without any overclocking, so the 9700k by default will most likely consume less... This review says 123w for 9700k : https://www.anandtech.com/show/13400/intel-9th-gen-core-i9-9900k-i7-9700k-i5-9600k-review/21

So a single 8 pin connector will be more than enough. 

 

You will probably be fine even with a 750 watt power supply, but it will depend on the other hardware you're gonna have ... for all I know you're gonna have two rtx2080 in your system.

[kainlp]

8 minutes ago, mariushm said:

You don't NEED to have both inserted. The 4 pin connector is optional.

 

The 8 pin EPS connector is enough to provide a processor with over 300 watts of power. The extra 4 pin cable is just for those who are really into heavy overclocking and it has some minimal benefits besides that (like less current through wires means the wires will heat less, there's less voltage drop on cables... but really they're tiny benefits).

 

The 9900k peaks at around 170 watts without any overclocking, so the 9700k by default will most likely consume less... This review says 123w for 9700k : https://www.anandtech.com/show/13400/intel-9th-gen-core-i9-9900k-i7-9700k-i5-9600k-review/21

So a single 8 pin connector will be more than enough. 

 

You will probably be fine even with a 750 watt power supply, but it will depend on the other hardware you're gonna have ... for all I know you're gonna have two rtx2080 in your system.

The thing is i will overclock it in the future, and i can return the power supply that i have for free and get a new one, i would rather have the small benefit of the extra cable, at the moment i am planing to run one rtx2080 but if necessary in the future i would add one more... the problem is i can't find a power supply that will have the 8 and 4 pin.

[mariushm]

You can find power supplies that have 2 cpu power cables, one that's EPS 8 pin and one that's 4+4

For example, my by now old Seasonic X-650 has such a cable arrangement

 

Here's some psus that have 2 cables:

 

100$ (30$ off) CORSAIR RMx Series RM750x CP-9020179-NA 750W - https://www.newegg.com/Product/Product.aspx?Item=N82E16817139233

100$  (60$ off) EVGA SuperNOVA 850 G3, 220-G3-0850-X1 - https://www.newegg.com/Product/Product.aspx?Item=N82E16817438092

105$ Seasonic FOCUS Plus Series SSR-750FX 750W - https://www.newegg.com/Product/Product.aspx?Item=N82E16817151187

130$ (105$ after 25$ mail-in rebate card) Seasonic FOCUS Plus Series SSR-850FX 850W - https://www.newegg.com/Product/Product.aspx?item=N82E16817151188

110$ CORSAIR RMx Series RM850x CP-9020180-NA 850W - https://www.newegg.com/Product/Product.aspx?Item=N82E16817139234

110$ EVGA 750 GQ 210-GQ-0750-V1 80+ GOLD 750W Semi Modular - https://www.newegg.com/Product/Product.aspx?Item=N82E16817438060

 

and others...

I'd go with the Corsair RMx series 850w, then the Seasonic 850w one , then the 750w rmx , then evga GQ series and last the g3 .

[kainlp]

4 minutes ago, mariushm said:

You can find power supplies that have 2 cpu power cables, one that's EPS 8 pin and one that's 4+4

For example, my by now old Seasonic X-650 has such a cable arrangement

 

Here's some psus that have 2 cables:

 

100$ (30$ off) CORSAIR RMx Series RM750x CP-9020179-NA 750W - https://www.newegg.com/Product/Product.aspx?Item=N82E16817139233

100$  (60$ off) EVGA SuperNOVA 850 G3, 220-G3-0850-X1 - https://www.newegg.com/Product/Product.aspx?Item=N82E16817438092

105$ Seasonic FOCUS Plus Series SSR-750FX 750W - https://www.newegg.com/Product/Product.aspx?Item=N82E16817151187

130$ (105$ after 25$ mail-in rebate card) Seasonic FOCUS Plus Series SSR-850FX 850W - https://www.newegg.com/Product/Product.aspx?item=N82E16817151188

110$ CORSAIR RMx Series RM850x CP-9020180-NA 850W - https://www.newegg.com/Product/Product.aspx?Item=N82E16817139234

110$ EVGA 750 GQ 210-GQ-0750-V1 80+ GOLD 750W Semi Modular - https://www.newegg.com/Product/Product.aspx?Item=N82E16817438060

 

and others...

I'd go with the Corsair RMx series 850w, then the Seasonic 850w one , then the 750w rmx , then evga GQ series and last the g3 .

So then 2x 8pin (4+4) means that i can split one 8 into 2x4 ? if yes than thank you very much. i was confused with the 2x 8pin (4+4) thing , i will get the one from evga, again Thank you.

[Quadriplegic]

7 hours ago, kainlp said:

The thing is i will overclock it in the future, and i can return the power supply that i have for free and get a new one, i would rather have the small benefit of the extra cable, at the moment i am planing to run one rtx2080 but if necessary in the future i would add one more... the problem is i can't find a power supply that will have the 8 and 4 pin.

Will you overclock using LN2? 

If not, then extra 4 pin won't do anything