Forza Horizon 5 experiences intense heat during high temperatures.
Forza Horizon 5 experiences intense heat during high temperatures.
You're dealing with a 5900X CPU that's been running for about two days. You upgraded it from a 3900X to replace it, but you're still having trouble with thermal performance on FH5 games. Your BIOS OC set the voltage down by 20 points, which helped stability but didn't fully resolve the issue. The AIO cooler you're using is decent, but being enclosed and open at the front might affect cooling efficiency compared to an open setup. With your 3900X, temperatures were around 40°C idle and 55-60°C during games, but now they've dropped to 44°C idle and 60-65°C gaming temps. The CPU is still handling high loads with peak temps near 72°C, though it's pushing the limits. The 5900X uses Zen3 chips, which tend to be more volatile than Zen2, making thermal stability a bit more challenging. It seems like the game itself isn't the main culprit—your setup and environment are likely contributing more. Consider checking fan speeds, ensuring proper airflow, or even trying a different cooler if possible.
Ensuring complete thermal paste coverage across the entire CPU lid and heat spreader is essential for optimal cooling performance.
Your 2600X performs identically in a stock cooler at room temperature (18°C) during extended use.
According to CBR23, the system stabilizes around 72-73°C after 5-7 minutes and doesn’t rise further. I didn’t test Unigine, but since it’s a GPU benchmark, my machine is watercooled with a peak temperature of 51.5°C—no problems detected. EDIT: Ran Unigine test earlier; CPU max was 66°C, GPU at 41°C (basic 3080 Eagle, undervolted on a 360 CLC). I re-ran it two days ago after installing a new CPU. If thermal contact was an issue, it wouldn’t appear in one game but across multiple tests or benchmarks.
The 5900X reaches its peak boost at 4.95GHz when running normally. Earlier, I was able to achieve this during short gaming sessions before applying any optimization tools. Those frequency values are completely typical. Secondly, Tdie tends to be a concentrated heat zone. In games with limited threads, like FH5, you'll notice intense usage on one thread while others remain idle. This leads to the greatest boost performance, which raises voltage levels and pushes the CPU well beyond its thermal limits. Consequently, the core handling the load becomes significantly hotter due to the focused power output in a small space.
I'm considering the same idea, but it's surprising how high it gets—almost everyone else hits around 70°C, while this one climbs to 85°C. It feels odd that any other lightweight or core game doesn't reach that level, and it seems like each thread eventually peaks in turn.
It's not about how fast the GPU runs—it's about delivering enough power so we can check if the enclosed unit can manage the heat when both CPU and GPU are fully used. If the case is sealed, it may begin to circulate air even if it looks open at the front, especially in a tight space.
Combining CPU and GPU usage has minimal impact on results. The GPU stays well-cooled thanks to water cooling, rarely reaching 55°C, which doesn’t significantly raise CPU temperatures. The open front design features a 360mm GPU with intake fans inside a mesh case. I had a 3900X before expecting the 5900X to perform similarly, but it didn’t. During heavy multithreaded tasks (CBR23), temperatures stay around 72°C max. In lighter threaded or gaming scenarios where the 3900X hit 65°C, the 5900X quickly jumps to 75°C and then rises steadily to 85°C—possibly due to the enclosure, and this would be lower in an open setup. It’s not a major issue; the CPU handles those temps without problems, but it’s just uncomfortable to sit near and the fans are loud, which I dislike. I’ve settled for allowing the CPU temperature to reach about 75°C in BIOS settings, maintaining good performance while staying cooler and quieter.