Problems with DRAM speed following RAM installation
Problems with DRAM speed following RAM installation
The system appears to be running outdated firmware and BIOS settings. After upgrading the RAM, you manually adjusted the DRAM frequency in BIOS but didn’t save changes. The BIOS still shows both sticks at 1333MHz despite the hardware supporting 1600MHz. Checking HWiNFO or CPU-Z confirms the modules are reporting 665.2MHz, which matches dual-channel operation at half speed. To fix this, ensure you save and apply your BIOS settings before restarting, or update the BIOS to a version compatible with your hardware.
I previously had an Asrock motherboard with an i5 4750 and it struggled at 1600MHz. The manufacturer claimed it would work, but they didn’t deliver. Once I managed to get it running smoothly at that speed for a short time, it would crash repeatedly until I forced it back down to 1333MHz. It might have been an unusual case, but it happened. I didn’t mind much since the machine ended up being a TV PC for my parents instead of a Smart TV.
Occasionally modules from different batches don’t work well together. You might need to rearrange them and double-check they’re properly seated. For RAM speed, set the base clock to 100MHz and the multiplier to 8.0 (you’re currently at 6.67x). Also, consider resetting the CMOS battery if you haven’t already.