u/deathdisco_89

I am about to move my PC to new case and AIO, so I would like to upgrade my CPU (5700) at the same time. I believe the 16mb of l3 cache and PCIE 3.0 limit are having an impact on gaming performance. I would love to move to AM5, but I don't want to buy a new motherboard and DDR 5 RAM right now, so I am instead going to focus on getting the most out of AM4 for the next few years.

 I have researched the best AM4 processors, and I am between the 5800xt ($200) and 5900xt ($260). I would love to find a 5700x3d or 5800x3d, but they have been ridiculously hard to find and expensive ($400+ used).

I primarily use the PC for gaming, but it is also our primary home computer so I could have other use cases for it in the future. I could see myself repurposing this PC into a SFF mixed-use build when I eventually move to next generation platform for gaming.

Wha would you do?

 CPU: Ryzen 7 5700

Motherboard: ASRock B550 mATX

RAM: 32GB DDR4 3200MHz

GPU: Geforce RTX 5070

Storage: 2x 1 TB Gen 4 NVME

Case(new): Montech King 15 Pro mATX

CPU Cooler: AIO (TBD)

I got an ABS prebuilt off eBay a couple weeks ago and its been working great. Recently two of the 3 case fans will light up, but will not start spinning unless I blow air at that with a compressed air gun. Once they get spinning, they control completely normally until the power goes to sleep or powers down. I can manually increase fan speed to 100% using MSI Afterburner and they speed up appropriately. There is no dust build up or other power concerns with the rest of the PC. RGB responds correctly (SignalRGB). I updated the motherboard bios to the newest version. Any ideas what could be causing this?