I need help troubleshooting a new prebuilt PC that performs far worse than my other, lower-specced computer. The problem system has a Ryzen 7 7800X3D, RTX 5070, 32GB DDR5, and a 2TB Kingston Fury Renegade NVMe SSD, connected by Ethernet to a 1080p monitor. My other system has a Ryzen 5 9600X, RX 9060 XT, 32GB DDR5, and a 2TB SSD, uses Wi-Fi, and drives a 1440p monitor without problems.
In Minecraft Bedwars, the second PC reaches roughly 2,000 FPS with the same launcher, settings, and modpack, while the RTX 5070 system gets about 700 FPS and crashes when joining a server. War Thunder takes a very long time to load, stutters even on Movie settings, and sometimes fails to load textures. Even browsing feels delayed: YouTube and ordinary web pages take around five seconds to open using the same browser and extensions.
I have reinstalled Windows, updated the BIOS, chipset drivers, and GPU drivers, disabled Hardware-Accelerated GPU Scheduling, confirmed the DisplayPort cable is connected to the graphics card, and enabled EXPO. CrystalDiskInfo reports the SSD at 100% health, running at PCIe 4.0 x4, with temperatures around 43°C. CPU temperatures also appear normal.
Could this be caused by unstable EXPO memory, a PCIe slot or link-width problem, an incorrectly configured BIOS setting, GPU driver remnants, or a network/DPC latency issue? What benchmarks or hardware checks should I run to identify the bottleneck?
4 Answers
Reset the motherboard BIOS to defaults, update it if necessary, and then verify that the GPU is negotiating the expected PCIe generation and lane width. Resizable BAR should also be enabled. A benchmark such as the free 3DMark edition can provide a graphics and CPU score to compare against typical results for this hardware; unusually low scores would help distinguish a configuration issue from a game-specific problem.
EXPO is an overclock, so temporarily disable it and test the system at default memory settings. If the problems disappear, the memory profile or Infinity Fabric configuration may be unstable. The RAM is Kingston Fury, 2x16GB, rated at 6000 MT/s with CL30, but the exact kit model and current timings would help with troubleshooting.
Start with a clean graphics-driver installation using Display Driver Uninstaller, then install the current NVIDIA driver again. Also check NVIDIA settings to confirm the RTX 5070 is selected as the preferred processor. Since the machine is a prebuilt, reseating the GPU and checking both ends of its power cable would also be worthwhile.
Because the slowdown affects games, loading, and web browsing, check system-wide latency and hardware behavior rather than focusing only on FPS. Monitor CPU clocks, GPU utilization, temperatures, SSD activity, and PCIe link status while reproducing the issue. If a benchmark shows normal performance but games still crash, investigate software or driver conflicts; if the benchmark is also far below expectations, the prebuilt may have a hardware, power-delivery, BIOS, or installation problem.
The GPU is connected correctly and the preferred processor is already set to the RTX 5070. I may still try reseating the card, and I’ll look into a genuinely clean driver reinstall.