The original post: /r/overclocking by /u/Electrical_Rice_4191 on 2025-01-19 13:02:41.
I have a strange situation with my Ryzen 7500f processor.
My CPU cores frequency jumps from ~5050 to 4000 MHz during FPU test in Aida64. There is a moment when all cores have 5GHz (1 screen), but after a second the frequency of 1-3 cores drops to 4GHz (2 screen), and so on in a circle. Without FPU the frequency is stable.
I know the FPU test is very voracious, but my temperatures are perfectly fine. Maybe this is normal behavior, but I was helping a friend build a PC and on his 8400f the frequency was stable in this test.
Asrock bios have a set of profiles. Right now the profile is PBO, Tjmax 85, CO -20. I also tried just PBO, as well as profiles with lower Curve Optimizer value (-30, -40), but the situation does not change, by feelings with lower CO drops are even worse.
I thought maybe it's the consumption limits, because according to HWMonitor the CPU doesn't consume more than ~75w. But if I set CPU Boost Clock Override to +200MHz, the consumption will be 90w, drops will remain similar, only from ~5250 to 4200. I also updated the BIOS from 3.06 to 3.16, and inserted an additional 4pin on the CPU, because initially I inserted only 8pin (the manual says that the additional 4pin is not necessary).
What I haven't tried yet is reinstalling Windows. I'm using the same OS that I had on my previous Intel system with 1151 socket and was very surprised that it turned on and worked without any problems. But that shouldn't affect it, right?
Config
- Motherboard: Asrock B650 Pro RS
- Processor: Ryzen 7500f
- RAM: 2x XPG 6000 CL30 16gb (AX5U6000C3016G-DTLABBK) with EXPO
- GPU: RTX 4070 Gigabyte Windforce (great card btw)
So I have a question and a request.
- Is it normal to have such a frequency drop in AIDA FPU, when you don't seem to be within any limits?
- Please advise on basic settings to improve Ryzen 7500f. For example, the CO setting looks like a musthave for any Ryzen CPU, it greatly reduces temperature and has no effect on productivity. There is probably more to it than that. Before that I had an I5 6400 with BCLK OC on a Z170-P and an I7 7700. There were a lot less settings, so I'm a bit confused)
