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2x8 pcie pin for RTX 3080

Rothhaus
By Rothhaus
in Power Supplies
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Go to solution Solved by TrigrH,
6 minutes ago, Rothhaus said:

You misunderstood me, on the back of the psu there is one entrance that says pcie 8 pin and another that says 4x4 CPU and then there’s a bunch of entrances for Sata cables

use both the CPU and GPU one for the GPU. Use the CPU one thats hardwired into the PSU.

PSU.thumb.png.20024c24c011498be06f2ea129a24a43.png

Posted

Hi, my question is wether or not it will be possible to use a single 2x8 pin pcie cable to power up the Asus tuf rtx 3080 or do I need two single 8 pin cables for it to work properly? 
My psu is Corsairs TX750M gold rated and it only has one 8 pin entrance for pcie and another 8 pin entrance for the cpu. I won’t be overclocking anything but I want the card to be able to be used to it’s full potential. 

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Just now, TrigrH said:

Don't lie, that PSU comes with two cables. Just admit you lost it / bought a prebuilt.

sort of irrelevant to the question...

 

on topic: it'll be less than ideal, it wont set fire to the cable/connectors/etc, but you will most likely get more voltage drop in the cables, i presume this could result in a slight reduction in power limit, but i assume it will work fine enough.

 

if you want to play on the safe side, running two 'dedicated' cables will be better, if you can get your hands on an extra cable.

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6 minutes ago, TrigrH said:

Don't lie, that PSU comes with two cables. Just admit you lost it / bought a prebuilt.

 

Anyway the solution to be safe is to order a new cable.

Not really, it comes with two cables, each cable has 2x 8 pin connectors.

Unless they are in series on a single cable, it shouldn't matter

Main PC [The Rig of Theseus]:

CPU: i5-8600K @ 5.0 GHz | GPU: GTX 1660 | RAM: 16 GB DDR4 3000 MHz | Case: Lian Li PC-O11 Dynamic | PSU: Corsair RM 650i | SSD: Corsair MP510 480 GB |  HDD: 2x 6 TB WD Red| Motherboard: Gigabyte Z390 Aorus Pro | OS: Windows 11 Pro for Workstations

 

Secondary PC [Why did I bother]:

CPU: AMD Athlon 3000G | GPU: Vega 3 iGPU | RAM: 8 GB DDR4 3000 MHz | Case: Corsair 88R | PSU: Corsair VS 650 | SSD: WD Green M.2 SATA 120 GB | Motherboard: MSI A320M-A PRO MAX | OS: Windows 11 Pro for Workstations

 

Server [Solution in search of a problem]:

Model: HP DL360e Gen8 | CPU: 1x Xeon E5-2430L v1 | RAM: 12 GB DDR3 1066 MHz | SSD: Kingston A400 120 GB | OS: VMware ESXi 7

 

Server 2 electric boogaloo [A waste of electricity]:

Model: intel NUC NUC5CPYH | CPU: Celeron N3050 | RAM: 2GB DDR3L 1600 MHz | SSD: Kingston UV400 120 GB | OS: Debian Bullseye

 

Laptop:

Model: ThinkBook 14 Gen 2 AMD | CPU: Ryzen 7 4700U | RAM: 16 GB DDR4 3200 MHz | OS: Windows 11 Pro

 

Photography:

 

Cameras:

Full Frame digital: Sony α7

APS-C digital: Sony α100

Medium Format Film: Kodak Junior SIX-20

35mm Film:

 

Lenses:

Sony SAL-1870 18-70mm ƒ/3.5-5.6 

Sony SAL-75300 75-300mm ƒ/4.5-5.6

Meike MK-50mm ƒ/1.7

 

PSA: No, I didn't waste all that money on computers, (except the main one) my server cost $40, the intel NUC was my old PC (although then it had 8GB of ram, I gave the bigger stick of ram to a person who really needed it), my laptop is used and the second PC is really cheap.

I like tinkering with computers and have a personal hatred towards phones and everything they represent (I daily drive an iPhone 7, or a 6, depends on which one works that day)

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11 minutes ago, Rothhaus said:

Hi, my question is wether or not it will be possible to use a single 2x8 pin pcie cable to power up the Asus tuf rtx 3080 or do I need two single 8 pin cables for it to work properly? 
My psu is Corsairs TX750M gold rated and it only has one 8 pin entrance for pcie and another 8 pin entrance for the cpu. I won’t be overclocking anything but I want the card to be able to be used to it’s full potential. 

unless they are in series it won't matter

Main PC [The Rig of Theseus]:

CPU: i5-8600K @ 5.0 GHz | GPU: GTX 1660 | RAM: 16 GB DDR4 3000 MHz | Case: Lian Li PC-O11 Dynamic | PSU: Corsair RM 650i | SSD: Corsair MP510 480 GB |  HDD: 2x 6 TB WD Red| Motherboard: Gigabyte Z390 Aorus Pro | OS: Windows 11 Pro for Workstations

 

Secondary PC [Why did I bother]:

CPU: AMD Athlon 3000G | GPU: Vega 3 iGPU | RAM: 8 GB DDR4 3000 MHz | Case: Corsair 88R | PSU: Corsair VS 650 | SSD: WD Green M.2 SATA 120 GB | Motherboard: MSI A320M-A PRO MAX | OS: Windows 11 Pro for Workstations

 

Server [Solution in search of a problem]:

Model: HP DL360e Gen8 | CPU: 1x Xeon E5-2430L v1 | RAM: 12 GB DDR3 1066 MHz | SSD: Kingston A400 120 GB | OS: VMware ESXi 7

 

Server 2 electric boogaloo [A waste of electricity]:

Model: intel NUC NUC5CPYH | CPU: Celeron N3050 | RAM: 2GB DDR3L 1600 MHz | SSD: Kingston UV400 120 GB | OS: Debian Bullseye

 

Laptop:

Model: ThinkBook 14 Gen 2 AMD | CPU: Ryzen 7 4700U | RAM: 16 GB DDR4 3200 MHz | OS: Windows 11 Pro

 

Photography:

 

Cameras:

Full Frame digital: Sony α7

APS-C digital: Sony α100

Medium Format Film: Kodak Junior SIX-20

35mm Film:

 

Lenses:

Sony SAL-1870 18-70mm ƒ/3.5-5.6 

Sony SAL-75300 75-300mm ƒ/4.5-5.6

Meike MK-50mm ƒ/1.7

 

PSA: No, I didn't waste all that money on computers, (except the main one) my server cost $40, the intel NUC was my old PC (although then it had 8GB of ram, I gave the bigger stick of ram to a person who really needed it), my laptop is used and the second PC is really cheap.

I like tinkering with computers and have a personal hatred towards phones and everything they represent (I daily drive an iPhone 7, or a 6, depends on which one works that day)

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10 minutes ago, TrigrH said:

Don't lie, that PSU comes with two cables. Just admit you lost it / bought a prebuilt.

 

Anyway the solution to be safe is to order a new cable.

You misunderstood me, on the back of the psu there is one entrance that says pcie 8 pin and another that says 4x4 CPU and then there’s a bunch of entrances for Sata cables

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4 minutes ago, mbntr said:

unless they are in series it won't matter

I’m sorry but what does series mean in terms of cables? 

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6 minutes ago, Rothhaus said:

You misunderstood me, on the back of the psu there is one entrance that says pcie 8 pin and another that says 4x4 CPU and then there’s a bunch of entrances for Sata cables

use both the CPU and GPU one for the GPU. Use the CPU one thats hardwired into the PSU.

PSU.thumb.png.20024c24c011498be06f2ea129a24a43.png

Insert ram related question here: https://linustechtips.com/main/topic/1197132-setting-ram-speed-xmp-docp-for-dummies/

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Just now, TrigrH said:

use both the CPU and GPU one for the GPU. Use the CPU one thats hardwired into the PSU.

Didn’t know that was possible, I thought the power available would be different in the PSU’s CPU entrance. Thanks 

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3 minutes ago, Rothhaus said:

Didn’t know that was possible, I thought the power available would be different in the PSU’s CPU entrance. Thanks 

They are different on the OTHER end (same on PSU end), so make sure to use the correct Y split cables.

 

Not all power supplies are the same, but for this model the PSU 8 pins are the same.

Insert ram related question here: https://linustechtips.com/main/topic/1197132-setting-ram-speed-xmp-docp-for-dummies/

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Posted

-> Moved to Case and Power Supplies

^^^^ That's my post ^^^^
<-- This is me --- That's your scrollbar -->
vvvv Who's there? vvvv

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