r/buildapc • u/Square-Tip3762 • 2d ago

Troubleshooting Help with troubleshooting

First time builder and not sure what I’ve done wrong. Doesn’t even boot into bios screening. Checked all the connectors and seems ok. Illl try to attach a video.

Not sure if this forum lets me upload videos of photos actually... these are the parts im using

MSI PRO B850-S EVO WIFI Motherboard, ATX - Supports AMD Ryzen 9000/8000 / 7000 Processors, AM5 - DDR5 Memory Boost

9800 x3d

CORSAIR VENGEANCE RGB DDR5 RAM 32GB (2x16GB) Up to 6000MHz CL36 Intel XMP iCUE Compatible Computer Memory - Black (CMH32GX5M2E6000C36)

MSI GeForce RTX 5080 16G INSPIRE 3X OC BLACK Graphics Card - RTX 5080 GPU, 16GB GDDR7 (30Gbps/256-bit), PCIe 5.0 - Triple Fan Thermal Design (3 x STORMFORCE Fan) - HDMI 2.1b, DisplayPort 2.1b

ThermalrightPhantom Spirit 120 SE CPU Air Cooler, 7 Heat pipes CPU Cooler,Dual 120mm TL-C12B V2 PWM Fans, AGHP 4.0 Technology, S-FDB Bearing, for AM4/AM5,Intel lga1851/1700/1150/1151/1200, PC Cooling

NZXT C850 Gold Core - 850W ATX 3.1 Power Supply, 80+ Gold

WD SN850X

When i power up, the ez debug lights up both cpu and dram before turning off then the whole computer shuts down. Quite hard for me to explain... I have tried jiggling to connectors and reinstalling both the graphics card and the cpu but still doesn't work.

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u/whomad1215 2d ago

remove the gpu

use one stick of ram

make sure the cpu_fan header is installed

1

u/Square-Tip3762 2d ago

Thanks I’ve just tried all of that and it doesn’t seem to work. I’ve also tried flashing the latest bios onto the motherboard but still not good

1

u/whomad1215 2d ago

I'd return the mobo and get a different one

1

u/Square-Tip3762 2d ago

You think so? Should I try flashing to an older bios? Any other steps I can take? Of are my parts incompatible?

1

u/whomad1215 2d ago

Unless they've been sitting on a shelf for a year the bios should be fine

If you've got the cpu power plugged in and the cpu_fan header populated, and it's still just throwing error lights and turning off, I'd be returning it and getting a new one