5900x model without bent pins available?
5900x model without bent pins available?
I recently acquired a 5900x off the Canadian Craigslist site (Kijiji) and it seems inactive. There are no LEDs, fans, beeps—even with the speaker connected to the motherboard, or GPU fans, or video output linked to the CPU. The seller has simply disappeared, suggesting I may not be able to request a return. It wasn’t included in a box, though I’m attempting to leverage AMD’s warranty for a claim.
My troubleshooting attempts: I swapped the CPU inside the case and then tested it on a bench. I’ve used two motherboards that support the 3600 and are compatible with the 5900x—both out-of-box and updated BIOS. I re-seated the CPU multiple times, tried different RAM sticks in all four slots, and verified the voltage readings for the motherboard’s 24-pin and CPU’s 8-pin connectors (they checked out).
Here are my details:
- Motherboard: AsRock B550m Pro 4 (both original and L2.62 BIOS)
- RAM: Patriot Viper 4 Blackout 2x8GB
- PSU: Fractal Ion+ 860W Platinum
- GPU: Gigabyte GTX 1660 Super SSD
- Cooler: Hyper 212 EVO CPU
- CPU: Ryzen 9 5900x (doesn’t work with any fixes)
- RAM tester: Used multimeter on powerbutton pins—voltage present.
- Attempts: Pressed powerbutton via case switch and screwdriver; no response. Pins look intact, no visible damage.
I’m currently running the system with the AsRock board and 3600 motherboard (no issues).
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Based on what we've handled, it seems the silicon was likely damaged. There could have been an overclock attempt that accidentally added power to the VCore, or a voltage spike to the SOC rail by mistake. It might also have come from a motherboard issue where the VRM failed and caused a voltage drop. Without a reliable POST code on the board to verify the failure, you've likely covered most troubleshooting steps. You might want to test different BIOS versions on each board, though it's unlikely the latest one will work with the 5900X.
I don't recall your payment method, but if you send a bank transfer, reach out to your bank as it used to be three days ago—this might stop the transaction. Credit card companies usually have some security feature, like my Amex card did, and my old visa card had something similar.
Thanks for your responses @RONOTHAN## @johnno23. I believe it’s likely dead silicon and won’t be fixable. Maybe taking it apart could help, but unless it’s just soldering, repair seems unlikely. If anyone knows of a successful CPU repair method, let me know. Regarding the refund, I paid cash, so insurance isn’t an option. AMD’s warranty also needs the original box, which I don’t have. It seems like a couple hundred Canadian dollars is lost.