I upgraded from a Ryzen 7 5700X to a Ryzen 7 5800X3D, but performance has unexpectedly dropped. In Cinebench, the 5700X scored about 15,172 points while the 5800X3D scores around 14,002, and the new CPU reaches roughly 90°C. Gaming temperatures are usually around 50–60°C, though they have reached about 85°C. I'm using a DeepCool LE500 liquid cooler and Snowdog Husky thermal paste. In the same area of Resident Evil Requiem, FPS fell from roughly 60 with the 5700X to 35–40 with the 5800X3D using identical settings. I tried a -20 curve undervolt, but -30 caused system shutdowns. The 5700X previously ran at about 80°C with PBO enabled and a -15 curve. My system has an ASUS TUF Gaming B550M-PLUS motherboard, 32GB of Kingston Fury Beast DDR4-3200 overclocked to 3600MHz with an 1800MHz FCLK, and an RTX 5070 Ti. What could be causing the lower performance?
5 Answers
The 5800X3D naturally runs hotter than a 5700X, but around 90°C in Cinebench is close to its thermal limit. Check effective clock speeds and whether it is thermal throttling rather than looking only at the temperature. Reseat the cooler, confirm the pump and fans are working, and make sure there is no mounting problem. If the chip is frequently throttling, try testing with PBO and curve offsets completely disabled first.
Cinebench scores and temperatures alone don’t explain a gaming FPS drop. Use a gaming benchmark such as 3DMark, and monitor GPU usage, CPU usage, effective clocks, frametimes, and temperatures. If GPU usage is low, check drivers, power settings, Resizable BAR/SAM, and whether the game changed its graphics or resolution settings. If GPU usage is high, the problem may not be the CPU at all.
I’ll run a 3DMark test and compare GPU usage and clocks while testing Cyberpunk and the same game area.
The 5800X3D should generally outperform a 5700X in games, so a drop from 60 FPS to 35–40 FPS points to a configuration or monitoring issue rather than the CPU model itself. Check the GPU driver installation, game-specific settings, BIOS options, chipset drivers, and background software. Compare the same resolution and settings, and clear any shader cache if the game or driver was recently changed.
First, make sure the motherboard BIOS properly supports the 5800X3D and install the latest AMD chipset drivers. Also verify that the CPU is actually boosting normally and that Windows is using the correct Ryzen power settings. A BIOS or chipset issue can cause unusual performance after a CPU swap.
I updated the BIOS a few months ago, but I’ll check for a newer version and install the chipset drivers before testing again.
Your memory settings are worth checking after the CPU change. Confirm that XMP/DOCP is enabled and that 3600MHz with an 1800MHz FCLK is genuinely stable. As a troubleshooting step, test temporarily at the normal 3200MHz profile and disable any aggressive CPU or memory tuning. Also verify that the 5800X3D is not stuck at unusually low clocks.
I have reseated the cooler twice with fresh paste and the installation looks correct. I’ll test at stock settings to rule out the undervolt.