Question Brand new PC - Black Screen (no display) + GPU fan not spinning

[superlosia1234]

My brand new PC turns on, but the display screen is black. No display, no bios, nothing. I recently learned my RAM is likely incompatible with my motherboard, but what concerns me is my GPU. Everything else seems to be on, but my GPU is lifeless (No lights, no fan spinning). Any help would be appreciated

CPU - AMD Ryzen™ 5 5600 Processor, 3.5GHz w/ 6 Cores / 12 Threads

Motherboard - MSI B550-A PRO w/ DDR4-3200, 7.1 Audio, Dual M.2, Gigabit LAN, CrossFire

GPU - MSI Radeon RX 6650 XT MECH 2X 8GB PCI-E w/ HDMI, Triple DP

PSU - Corsair RMx Series RM850x 80+ Gold Modular Power Supply, 850W

RAM - Silicon Power 16GB (2 x 8GB) DDR3 1600MHz (PC3 12800) 240-pin

 

[xpLoaDeD]

Either your GPU is not receiving PSU power or is bad placed on the PCI Express Slot. I would check for that first. Check the 8pin power connector is the one label for PCI Express, should be on your PSU unit.

Also if your RAM is incompatible , PC most likely wont boot or post. You are using DDR3 on a DDR4 platform. I really wonder how did you get DDR3 into DDR4 slot, cause those are 240pin not 288...

 

[superlosia1234]

Either your GPU is not receiving PSU power or is bad placed on the PCI Express Slot. I would check for that first. Check the 8pin power connector is the one label for PCI Express, should be on your PSU unit.

Also if your RAM is incompatible , PC most likely wont boot or post. You are using DDR3 on a DDR4 platform. I really wonder how did you get DDR3 into DDR4 slot, cause those are 240pin not 288...

It was a custom pc, so I'm guessing the tech guy didn't even bother testing it. The Ram slipped out very easily when touched.

When you say the PC won't "boot" or "post" does that mean it starts up but it's a black screen? No display, no bios. Would incompatible ram cause the GPU to not light up, fans not running?

 

[xpLoaDeD]

If GPU fans arent moving, your card is not getting powered correctly. You can say a PC has posted when you managed to see the mobo manufacturer logo on screen. I would double check all conections to be safe.
When RAM is missing (your case) PC still will power up but it will most likely throw a posting error or even just hang there endlessly

 

[cirdecus]

Whoever put that RAM in there doesn't know what they're doing. You should look for some solid 5000Mhz+ DD4 sticks, preferably two 16GB Paired.

I'd also check the power, as suggested. Make sure your PCI-e power cables are going to the GPU and your CPU auxilary power is plugged in (top left of the motherboard, should be an 8-pin power cable).

A quick pic of the case would help. Hope it gets working.