F5F Stay Refreshed Hardware Desktop Your computer briefly powers on and then shuts down, possibly indicating an issue.

Your computer briefly powers on and then shuts down, possibly indicating an issue.

Your computer briefly powers on and then shuts down, possibly indicating an issue.

L
LightAngels
Member
63
10-12-2022, 07:34 PM
#1
I’m working on assembling my PC and encountering an odd problem with my Gigabyte UD850GM power supply. Here’s what’s occurring: My computer starts up for roughly a second, then fans activate and RGB lights illuminate before it powers down completely. I’ve verified all connections and positioning. I noticed an unusual issue with my CPU 8-pin (4x4) cable: several cables fit the motherboard CPU power port but not the PSU’s CPU/PCIe ports. One cable works on both ends but lacks a pin on the PSU side. I own three cables total, none labeled, and I’m uncertain which ones are correct—possibly only PCI-E ones, since the shutdown happens instantly. My components: PSU – Gigabyte UD850GM, Motherboard – GIGABYTE B650, GPU – Radeon 9600 XT, CPU – AMD Ryzen 7 7 7700X. In the images you’ll see the cables I’m using. The one currently connected to my PSU is the missing-pin cable.
L
LightAngels
10-12-2022, 07:34 PM #1

I’m working on assembling my PC and encountering an odd problem with my Gigabyte UD850GM power supply. Here’s what’s occurring: My computer starts up for roughly a second, then fans activate and RGB lights illuminate before it powers down completely. I’ve verified all connections and positioning. I noticed an unusual issue with my CPU 8-pin (4x4) cable: several cables fit the motherboard CPU power port but not the PSU’s CPU/PCIe ports. One cable works on both ends but lacks a pin on the PSU side. I own three cables total, none labeled, and I’m uncertain which ones are correct—possibly only PCI-E ones, since the shutdown happens instantly. My components: PSU – Gigabyte UD850GM, Motherboard – GIGABYTE B650, GPU – Radeon 9600 XT, CPU – AMD Ryzen 7 7 7700X. In the images you’ll see the cables I’m using. The one currently connected to my PSU is the missing-pin cable.

N
NoPantsNeeded
Member
54
10-14-2022, 07:45 PM
#2
The cable featuring the 4 + 4 connector is definitely an EPS 4 + 4. The others appear too indistinct to be sure of their type. The missing pin is likely a key to prevent connecting to the wrong port. For a brand new computer, the power supply should still be returnable. I’d consider returning it since manufacturers shouldn’t waste time figuring out proper power cables for modular PSUs; investing in quality ones is worth it. There are many solid options available, so support the ones that truly deserve it.
N
NoPantsNeeded
10-14-2022, 07:45 PM #2

The cable featuring the 4 + 4 connector is definitely an EPS 4 + 4. The others appear too indistinct to be sure of their type. The missing pin is likely a key to prevent connecting to the wrong port. For a brand new computer, the power supply should still be returnable. I’d consider returning it since manufacturers shouldn’t waste time figuring out proper power cables for modular PSUs; investing in quality ones is worth it. There are many solid options available, so support the ones that truly deserve it.

K
kjeld_skater
Member
52
11-02-2022, 09:57 AM
#3
I visited the gigabyte site and discovered the pinout diagram, which could clarify cable identification.
K
kjeld_skater
11-02-2022, 09:57 AM #3

I visited the gigabyte site and discovered the pinout diagram, which could clarify cable identification.

L
Lewiswilson4
Member
148
11-15-2022, 10:11 PM
#4
I faced a comparable challenge when assembling my PC, which proved difficult to resolve. Simply remove the connector for the front panel power switch and power on the machine by briefly connecting the power button pins on the motherboard with a screwdriver. If it starts working properly, your power button might be misaligned or faulty. This could be a straightforward fix that would prevent many frustrations.
L
Lewiswilson4
11-15-2022, 10:11 PM #4

I faced a comparable challenge when assembling my PC, which proved difficult to resolve. Simply remove the connector for the front panel power switch and power on the machine by briefly connecting the power button pins on the motherboard with a screwdriver. If it starts working properly, your power button might be misaligned or faulty. This could be a straightforward fix that would prevent many frustrations.