AB350 ITX/ac with P4.50 bios and GTX 950

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   Hardware:
ASRock Fatal1ty AB350 Gaming-ITX/ac with P4.50 bios
AMD Ryzen 2700
EVGA GTX 950
Patriot 16GB Kit (2 X 8GB) 3400 MHz (PC4-27200) Viper 4 Series DDR4 Ram
Cooler Master 750w Bronze PSU

The GTX 950 works great in 2 other computers, one of them using the same PSU I'm trying to use in this new build. However, in the build listed above, it won't post. No beep code, nothing, other than the CPU fan spinning up. USB devices such as a thumb drive don't light up. I swapped the 950 for my wife's old EVGA 560 TI, and everything works fine, and this is the only change needed to get it running. I am positive I hooked everything up correctly, and I've tried to go through bios to see if it's an option preventing it from working with the 950 (UEFI vs Legacy support options, etc), but I am out of ideas. I turned on bios beep on POST to make sure it wasn't just a cable/output issue (Edit: With the 950 it does not beep at all, it does with the 560). I've run through many tests swapping GPUs trying to get the 950 working.

Does anyone know what the issue might be? I'm stumped.

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lienmeat Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 13 May 2018 Status: Offline Points: 6	Post Options Post Reply Quote lienmeat Report Post Thanks(0) Quote Reply Topic: AB350 ITX/ac with P4.50 bios and GTX 950 Posted: 13 May 2018 at 1:51am
	Hardware: ASRock Fatal1ty AB350 Gaming-ITX/ac with P4.50 bios AMD Ryzen 2700 EVGA GTX 950 Patriot 16GB Kit (2 X 8GB) 3400 MHz (PC4-27200) Viper 4 Series DDR4 Ram Cooler Master 750w Bronze PSU The GTX 950 works great in 2 other computers, one of them using the same PSU I'm trying to use in this new build. However, in the build listed above, it won't post. No beep code, nothing, other than the CPU fan spinning up. USB devices such as a thumb drive don't light up. I swapped the 950 for my wife's old EVGA 560 TI, and everything works fine, and this is the only change needed to get it running. I am positive I hooked everything up correctly, and I've tried to go through bios to see if it's an option preventing it from working with the 950 (UEFI vs Legacy support options, etc), but I am out of ideas. I turned on bios beep on POST to make sure it wasn't just a cable/output issue (Edit: With the 950 it does not beep at all, it does with the 560). I've run through many tests swapping GPUs trying to get the 950 working. Does anyone know what the issue might be? I'm stumped.

Windows98 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 11 Apr 2017 Status: Offline Points: 22	Post Options Post Reply Quote Windows98 Report Post Thanks(0) Quote Reply Posted: 13 May 2018 at 2:33am
	make sure CSM is enabled Edited by Windows98 - 13 May 2018 at 2:34am

lienmeat Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 13 May 2018 Status: Offline Points: 6	Post Options Post Reply Quote lienmeat Report Post Thanks(0) Quote Reply Posted: 13 May 2018 at 3:11am
	It is enabled. Someone in another forum suggested I set Video to Legacy mode under CSM, but strangely, I don't have that option, even after setting UEFI settings back to defaults. Edited by lienmeat - 13 May 2018 at 7:26am

lienmeat Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 13 May 2018 Status: Offline Points: 6	Post Options Post Reply Quote lienmeat Report Post Thanks(0) Quote Reply Posted: 13 May 2018 at 4:11am
	Update: With an AMD a8 APU, I'm able to use the gtx 950 as an output without any issues, and boot, but the CSM option for setting the video to legacy is not available in this case either.