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In need of a new PSU after upgrading

Craven287
By Craven287
in Power Supplies
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Posted

Hello,

Current PSU is a Cooler Master GX II Gold 850.
I've upgraded to
Board: MSI X870 Tomahawk
CPU: Ryzen 9 7900X
GPU: Gigabyte Radeon RX 9070 XT

 

It was only when I was trying to plug everything in that I discovered I'm not good at research.
I don't have enough 6+2 PCIe available.

The PSU allows 4, came with 3 cables and I need 5.

Board wants 2, GPU wants 3.

 

What PSU would be a good replacement?

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Posted (edited)

 

25 minutes ago, Craven287 said:

I don't have enough 6+2 PCIe available.

The PSU allows 4, came with 3 cables and I need 5.

Board wants 2, GPU wants 3.

Unless you are doing really heavy CPU overclocking, your motherboard only needs 1.

 

Also, CPU uses cable that are marked "CPU" or "EPS", not PCIE

 

25 minutes ago, Craven287 said:

What PSU would be a good replacement?

Corsair Rmx is good, RMe is also fine.

Personally using RM1000x 2024 version right now.

 

edit:

But I doubt you need it, unless you really want to populate every goddamn header with a cable.

Edited by Poinkachu

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ENGLISH IS NOT MY NATIVE LANGUAGE, NOT EVEN 2ND LANGUAGE. PLEASE FORGIVE ME FOR ANY CONFUSION AND/OR MISUNDERSTANDING THAT MAY HAPPEN BECAUSE OF IT.

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2 minutes ago, Poinkachu said:

Unless you are doing really heavy CPU overclocking, your motherboard only needs 1.

 

Corsair Rmx is good, RMe is also fine.

Personally using RM1000x 2024 version right now.

I think OP is confused because MSI puts another PCIE connector on the bottom of the motherboard as well.

MSI does a terrible job by not explaining that this is entirely optional unless you are doing heavy GPU overclocking

image.thumb.png.271fbc9d66c2490de734a67102f69c88.png

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12 minutes ago, Hinjima said:

I think OP is confused because MSI puts another PCIE connector on the bottom of the motherboard as well.

MSI does a terrible job by not explaining that this is entirely optional unless you are doing heavy GPU overclocking

 

Ah right, forgot that assholery exist, got that one on my B850 Tomahawk too.

Rather than GPU overclocking I think it's more to for when you put a lot of high power PCIE cards.
I mean, PCIE slot are limited to 75w anyway, not like plugging a cable to that header gonna raise the limit. 

 

But yeah, it's MSI, for 1 right/nice thing they do, they have to add 1 more weirdness.

Good job on putting a 90 degree Type-C and USB3 header, then put an 8pin PCIE header. 🤣

 

@Craven287, if what @Hinjima said is true that you were also referring to the bottom PCIE header on the x870 tomahawk then dont bother, you dont need to plug cable to it.

 

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ENGLISH IS NOT MY NATIVE LANGUAGE, NOT EVEN 2ND LANGUAGE. PLEASE FORGIVE ME FOR ANY CONFUSION AND/OR MISUNDERSTANDING THAT MAY HAPPEN BECAUSE OF IT.

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12 minutes ago, Poinkachu said:

Ah right, forgot that assholery exist, got that one on my B850 Tomahawk too.

Rather than GPU overclocking I think it's more to for when you put a lot of high power PCIE cards.
I mean, PCIE slot are limited to 75w anyway, not like plugging a cable to that header gonna raise the limit. 

 

@Craven287, if what @Hinjima said is true that you were also referring to the bottom PCIE header on the x870 tomahawk then dont bother, you dont need to plug cable to it.

 

i have an MSI MPG x870e edge ti wifi (god damn MSI those names..........) i noticed a bump in performance for my rx6800xt when i plugged that cable, i didn't see much documentation but only the "plug cable in for more GPU power" though...

 

i would plug it in even if it's not completely needed, if the GPU needs more power it will draw it otherwise it's just another connected cable 

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1 minute ago, y0ur5h4d0w said:

i have an MSI MPG x870e edge ti wifi (god damn MSI those names..........) i noticed a bump in performance for my rx6800xt when i plugged that cable, i didn't see much documentation but only the "plug cable in for more GPU power" though...

 

i would plug it in even if it's not completely needed, if the GPU needs more power it will draw it otherwise it's just another connected cable

Didnt change anything for my 5080

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ENGLISH IS NOT MY NATIVE LANGUAGE, NOT EVEN 2ND LANGUAGE. PLEASE FORGIVE ME FOR ANY CONFUSION AND/OR MISUNDERSTANDING THAT MAY HAPPEN BECAUSE OF IT.

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15 minutes ago, Poinkachu said:

Also, CPU uses cable that are marked "CPU" or "EPS", not PCIE

The PSU has those labeled as "8P PCIe/CPU" so that had me thinking they were the same, sorry.

10 minutes ago, Hinjima said:

I think OP is confused because MSI puts another PCIE connector on the bottom of the motherboard as well.

MSI does a terrible job by not explaining that this is entirely optional unless you are doing heavy GPU overclocking

image.thumb.png.271fbc9d66c2490de734a67102f69c88.png

No, not the circled one, there's 2 at the top left of the board, labeled as CPU_PWR1 and 2. That has me assuming they both need to be filled?

 

Thank you both for the replies so far.

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11 minutes ago, Craven287 said:

The PSU has those labeled as "8P PCIe/CPU" so that had me thinking they were the same, sorry.

While on the PSU side the connector might be the same for CPU/EPS and PCIE to make it easier for users, on the other end of the cable they should be different. 

Look for markings on the connector itself 

 

Take a pic and post here if you are still unclear about it.

 

11 minutes ago, Craven287 said:

No, not the circled one, there's 2 at the top left of the board, labeled as CPU_PWR1 and 2. That has me assuming they both need to be filled?

Nah, as i said, casual users usually only need 1

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1 hour ago, Poinkachu said:

While on the PSU side the connector might be the same for CPU/EPS and PCIE to make it easier for users, on the other end of the cable they should be different. 

Look for markings on the connector itself 

 

Take a pic and post here if you are still unclear about it.

 

Nah, as i said, casual users usually only need 1

 

Added pics of the PSU and cables.

 

LTT_PSU.jpg

LTT_CPU8PIN.jpg

LTT_CPU44PIN.jpg

LTT_PCIE62PIN.jpg

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7 minutes ago, Craven287 said:

 

Added pics of the PSU and cables.

 

Seems fine

 

Marked CPU goes to CPU power header on motherboard top left

Marked PCIE goes to GPU

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ENGLISH IS NOT MY NATIVE LANGUAGE, NOT EVEN 2ND LANGUAGE. PLEASE FORGIVE ME FOR ANY CONFUSION AND/OR MISUNDERSTANDING THAT MAY HAPPEN BECAUSE OF IT.

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32 minutes ago, Craven287 said:

That's the problem, I've only got 1 that's marked PCIE and it looks like I need 3.

 

huh? 

Based on Cooler Master's website and the PSU product sheet there should be a total of 4x PCIE connectors that comes with the psu, most likely in form of TWO daisy-chained cables.

 

https://www.coolermaster.com/en-global/products/gx-ii-gold-850/?tab=tech_spec

https://coolermaster.egnyte.com/dl/HOmxDOKNOs 

image.png.7de45026276d582e3350d2fb90a2e1b7.png

 

image.png.241c56991cb34e5e644b6c662a703188.png

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ENGLISH IS NOT MY NATIVE LANGUAGE, NOT EVEN 2ND LANGUAGE. PLEASE FORGIVE ME FOR ANY CONFUSION AND/OR MISUNDERSTANDING THAT MAY HAPPEN BECAUSE OF IT.

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24 minutes ago, Poinkachu said:

huh? 

Based on Cooler Master's website and the PSU product sheet there should be a total of 4x PCIE connectors that comes with the psu, most likely in form of TWO daisy-chained cables.

 

https://www.coolermaster.com/en-global/products/gx-ii-gold-850/?tab=tech_spec

https://coolermaster.egnyte.com/dl/HOmxDOKNOs 

image.png.7de45026276d582e3350d2fb90a2e1b7.png

 

image.png.241c56991cb34e5e644b6c662a703188.png

 

...all the cables I've got, I've taken pics of. I don't have any more cables, the box was empty. I know that for a fact because I tore the box apart in order to fit it in the bin. There was literally nothing left in it.

 

 

https://store.coolermaster.eu/products/pci-e-8-pin-to-2x-6-2-pin-modular-flat-cable-model-1

Can I buy one, fill up the PSU, fill up the GPU and be done with this mess? Will that work?

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7 minutes ago, Craven287 said:

 

...all the cables I've got, I've taken pics of. I don't have any more cables, the box was empty. I know that for a fact because I tore the box apart in order to fit it in the bin. There was literally nothing left in it.

 

 

https://store.coolermaster.eu/products/pci-e-8-pin-to-2x-6-2-pin-modular-flat-cable-model-1

Can I buy one, fill up the PSU, fill up the GPU and be done with this mess? Will that work?

Uh... I woulda RMA it since it lacks the cables it should've came with.

Or atleast contact cooler master, explain what happened and see if they can send you the cables for free.

 

7 minutes ago, Craven287 said:

https://store.coolermaster.eu/products/pci-e-8-pin-to-2x-6-2-pin-modular-flat-cable-model-1

Can I buy one, fill up the PSU, fill up the GPU and be done with this mess? Will that work?

Yeah

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ENGLISH IS NOT MY NATIVE LANGUAGE, NOT EVEN 2ND LANGUAGE. PLEASE FORGIVE ME FOR ANY CONFUSION AND/OR MISUNDERSTANDING THAT MAY HAPPEN BECAUSE OF IT.

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RX 9070 XT has a peak power consumption of around 360 watts, but for most games, your power consumption is gonna be under 300 watts. 

 

Because each 8 pin connector is rated for maximum 150 watts and 360 watts is more than 300 watts  they put a third  8 pin connector on the card. But, the card itself won't take the maximum of 150 watts through each connector, it's more like that maximum of 360 watts will be split between the 3 and you'll have around 120 watts maximum on each of those connectors. 

 

In real world, unless you're gonna run benchmarks I doubt the video card's gonna consume more than 300 watts. 

 

As a quick fix, you could just buy an  extension cable that splits a pci-e 8 pin connector into 2 pci-e 8 pin connectors, here's an example of such cable : https://www.amazon.com/Cable-Matters-2-Pack-Power-Adapter/dp/B0CLZ85HJN/

 

 

 

 

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