MSI x99a SLI Plus + Radeon Sapphire Pulse RX 6600 8 GB - no signal

michalufnia158402e6

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May 17, 2022
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Hi, I built a pc based on x99a SLI Plus motherboard and recently added a GPU to it (Sapphire Radeon RX 6600 8 GB PULSE). The GPU starts on boot and them during Windows loading its fans stop working and there is no signal from the card.

Has anyone had a similar issue?

My pc is:
MSI x99a SLI Plus motherboard
i7 6900k
2 x DDR4 8GB Corsair 2400MHz
WD BLUE SN570 500GB M.2 PCIe Gen3 NVMe
Thermaltake Littepower 500W power supply

and recently added
Sapphire Radeon RX 6600 8 GB PULSE


The GPU is definitely working as I tested it on another PC.

Thank you.
 
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badboy2k

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what PSU was in the other Computer? I am leaning towards the Power supply cant handle the Current draw of your new GPU as the Thermaltake Litepower 500W PSU is a much older design that has split power Rails so it would be nice to find out what the Other PC's Power Supply was!
 

michalufnia158402e6

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Hi and thank you.

I thought that too. The other pc was 750W but it has multiple sata and m.2 drives connected as I store lots of photos. The PC in question is 500W but I disconnected everything I could that could potentially draw power. I only left the system M.2 drive, 1 system fan and 1 cpu fan. I took 1 RAM stick out as well leaving only one.
 

badboy2k

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Hi and thank you.

I thought that too. The other pc was 750W but it has multiple sata and m.2 drives connected as I store lots of photos. The PC in question is 500W but I disconnected everything I could that could potentially draw power. I only left the system M.2 drive, 1 system fan and 1 cpu fan. I took 1 RAM stick out as well leaving only one.
can you try with the other systems PSU to see what happens in your X99 system?
 

badboy2k

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That would be my last resort, I'm not excited about stripping it and then redoing it again :-)
you can leave most in place you just need the 24pin, 8Pin CPU and PCI-E Power to test. (no need to move the Whole PSU just the Cables only just put them next to each other and strech them over and into the Connectors) if like that it works then the PSU really is the Problem.
 

Svet

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Also what BIOS version board is using?
 
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