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Installing Corsair PSU TX650 into alienware aurora R7
Hi,
I recently purchased a 650W PSU to upgrade my 460W PSU in alienware aurora R7. I am having trouble figuring out what cord needs plugged into the GPU PWR. I've been researching and have seen different answers. Some saying use the CPU 4+4 to split into CPU And GPU, then others saying use PCIe 6+2 cord split to 6 for the GPU.
I just want to make sure I am doing this right as I am new to this and don't mess anything up.
Let me know thank you.
research links:
https://www.dell.com/community/Alienware-Desktops/Aurora-R7-power-supply-upgrade/td-p/7761538
speedstep
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October 15th, 2021 09:00
@Jcorey88
Please press the blue Accept as Solution button below if this post answers your question.
8 pins is not a designation. GPU is not CPU and vice versa.
I do not believe the 6+2 is the correct cable. They are keyed so you cant go wrong but users FORCE the wrong connector into the hole destroying everything.
I would ask @Cass-Ole
If you are wrong with the connection you will blow up everything including ram, cpu, hdd, etc.
r72019
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October 16th, 2021 14:00
You can do one 4PIN for the CPU, and one 4PIN for the GPU_PWR header.
The PC will not boot if you leave the 8 PIN GPU_PWR header empty.
The PC will not work properly and may get permanently damaged if you plug a PCIe 6+2 into the GPU_PWR header.
If you unfortunately only have a single 4+4 connector with your new aftermarket PSU, you should be able to plug one 4PIN to the CPU, and the other 4PIN to the LEFT side/half of the 8 PIN GPU_PRW connector on the motherboard, leaving the right 4 PINs empty in the motherboard and it will boot like that. I say this because the OEM 460W PSU is wired that way, the 850W is not. So keep in mind if you upgraded your GPU from OEM it may not be a good idea.
Jcorey88
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October 15th, 2021 18:00
Ok, just making sure this is clear - the 4+4 cord is split with part going to CPU connection and the other going to GPU connection?
Vanadiel
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October 15th, 2021 18:00
yes, that is the idea.
If you look at your original "8 PIN", it should only have 4 wires going to it.
Vanadiel
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October 15th, 2021 18:00
@ speedstep is very correct. If you look at the Youtube video at 3:21, you can see the layout of the 8 pin, which is a standard EPS-12V 8 pin connector.
It has square-round-round-square at the top, and the opposite at the bottom, just as in the picture above.
It is NOT a 6+2 PCIe and that guy in that picture is giving terrible advice. If you go to 3:27 in that video you can see the assembled connector has 3 rounds next to each other, which is the picture for the PCIe 8 Pin power connector in the picture above. That one is always for video cards, never for power to a motherboard.
That guy must have had to force that very hard to get it to connect to the motherboard. That and you can permanently damage your board since it's keyed to avoid swapping the polarity on the connector. Those are actually 4 individual +12 lines, black is negative and yellow positive.
You should be using the CPU 4+4 and connect them together to make a single 8 pin connector.
The other one should be using the 4 PIN, but I do not believe the power supply has a 4 pin + 8 pin.
I think it only has:
1 x Main connector (20+4Pin)
1 x 4+4 Pin CPU
8 x Peripheral
8 x SATA
2 x Floppy
2 x PCI-E
Now I think you are "in luck", as it looks the 8 original 8 pin connector is actually only used as a 4 PIN connector and only wired up as a 4 PIN connector.
In which case the simple solution is to split the 4 + 4 PIN, and use 1 x 4 PIN for the top connection, and 1 x 4 PIN for the lower connection.
Picture is in this thread: Picture
Compare to your existing cabling before starting, take a picture and make sure you can see what is what, and connect the new connectors as per your picture.
Jcorey88
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October 15th, 2021 19:00
So I'm looking at the the Corsair cord 4+4, and if I were to plug the portion that fits into CPU, the other split portion does not fit the GPU as the connections do not fit it - (no square slots).
CPU
GPU
Vanadiel
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October 15th, 2021 20:00
Are you sure that is the correct connector?
This is a picture of the board, it matches the layout of the pictures provided by Speedstep.
Vanadiel
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October 15th, 2021 20:00
There should be an 8 PIN CPU connector, can also be called EPS or 8 PIN AUX Power.
The GPU belongs to the GPU connectors, that's from a different cable end.
The parts should slide together to form an 8 pin, or 2 single 4 pins if you take it apart.
Vanadiel
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October 15th, 2021 20:00
It's a bit hard to see in the picture, but if this is the PSU you have from Corsair, they have 2 different cables that plug into that PSU, but the other end of each of those is different.
So it is a bit odd they labelled it so poorly. The top right in that picture is the 4 + 4 CPU, the bottom right the 6+2 PCI-E.
The labelling is wrong in my opinion...
Jcorey88
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October 15th, 2021 22:00
The pictures are of the 4+4 cable. Sorry I was under the impression that the CPU 4+4 was to connect both CPU And GPU. So I am using 6+2 PCIe cable for the GPU then? very confused as another community member above earlier stated the PCIe cable (6+2) should not be used for GPU connection.
Vanadiel
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October 16th, 2021 11:00
The 4 + 4 is for the CPU only.
The 6 + 2 is for the GPU only.
They are keyed differently to avoid mixing them up.
r72019
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October 16th, 2021 13:00
@Jcorey88
Take the 4+4 12V EPS cable and plug it into the GPU_PWR 8 PIN header.
Do not plug a PCiE 6+2 in into your GPU_PWR header on the motherboard.
Here, photos from my Aurora R7.
r72019
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October 16th, 2021 13:00
The wiring is different for 6+2 than a 4+4.
A standard PCIE 6+2 connector will not fit into the GPU_PWR header on the motherboard unless forced. IT's also not wired properly to accept this.
Jcorey88
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October 16th, 2021 14:00
Ok so if I use the other half of EPS 12V, there are no square connectors that will match with the left side of the GPU port. Is that OK ?
r72019
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October 16th, 2021 14:00
The GPU_PRW header in the Aurora R7 also requires an EPS 12V connector. A PCIE 6+2 connector will not work.