Change the BCLK setting in BIOS, but the BCLK frequency stays at 100MHz in the operating system.
Change the BCLK setting in BIOS, but the BCLK frequency stays at 100MHz in the operating system.
Hi all,
I own an i5 3570k CPU and a Intel DH77DF motherboard. Unfortunately, I can't change the unlocked multiplier on this board, but I can adjust the BCLK and bus speed as you might be familiar with. Previously, I could overclock by setting the BCLK to 105MHz in the BIOS, booting into Windows, and using CPU-Z to confirm the correct clock speed. The adjusted BCLK multiplied by the multiplier worked for me, even though it wasn’t the most effective method.
About a week ago, I realized my CPU had stopped overclocking. In CPU-Z, the BCLK was stuck at 100MHz and wouldn’t update. The BIOS still showed 105MHz, which was correct. When I checked the operating system, it returned to 100MHz.
I tried various fixes—restarting BIOS settings, tweaking BIOS parameters, reinstalling chipset drivers, and even re-flashing the BIOS—but nothing resolved the issue. I can manually set the BCLK in the BIOS, but once the OS starts, it reverts to 100MHz regardless.
I found out that the BCLK setting in the BIOS remains fixed at whatever I choose, while the OS reports a different value. Interestingly, other BIOS features aren’t functioning properly either. I can change any BIOS setting, but those changes don’t persist after a reboot.
This is puzzling. I work in the tech field and often troubleshoot hardware problems, but this situation left me completely confused. Do you have any insights or suggestions on how to resolve it?
Thank you for your time.
Regards,
organophosphate
Have you checked CPU-Z? It often displays the default motherboard settings.
Tradesman1 :
Have you checked CPU-Z? It usually displays the default values for the motherboard.
Tradesman1 :
Have you checked CPU-Z? It usually shows the default values for the motherboard.
Yes, I checked CPU-Z. I used it to confirm my overclocking before this issue happened. Previously, everything functioned correctly. I would adjust the bus speed in BIOS, boot into Windows, and run CPU-Z. It would accurately reflect the new frequency.
For example, if I increased the BIOS BCLK to 105, CPU-Z would indicate the bus speed as 105.
I also tried other programs to verify my overclocking, but they consistently showed the stock speed of 100MHz regardless of BIOS settings.
Thanks for reading and responding.
Tradesman1 shares similar experiences, noting many defaults appear. He believes minimal BCLK OCing results in small improvements and suggests considering a Z77 motherboard. He plans to upgrade his system within 6-12 months, aiming to maximize performance from his current setup. He’s willing to accept extra strain on components for a shorter time before the PC is unused. The previous performance was solid, around 4GHz without over-volting, and improved slightly in certain games. He appreciates the advice and looks forward to future rebuilds.