For a while I had a brand new NZXT PC built by NZXT (this is not redundant as they also sell kits). Early in the life of the PC (within first few days), I had a BSOD, which with tech support was fixed by updating the BIOS.
One thing that I did not take note of (because I did not know it existed) was to check memory timings. I had assumed this was automatic. I have no idea what the original timings were.
However, I do know from my hefty invoice that I have Teamgroup's Xtreem 2x16GB 4000Mhz DDR4 RAM. I also UPGRADED to 64GB of RAM by adding 2 more 16GB banks of the EXACT same model RAM.
What I did not anticipate was that if there were any adjustments ever made to the RAM, it would have been gone when I upgraded the BIOS. So without any knowledge of what went before, when I learned of XMP profiles, I went into BIOS and sure enough, XMP was disabled, and speed was 2400Mhz. Okay, no biggie, its an Aorus 590 motherboard, so even easy mode you can one-click enable XMP, which I did, which changed the RAM speed to 4000Mhz and instantly crashed the PC on next reboot. Tried a few more times, crashing each time, then gave up, entered the BIOS and set it to 3900Mhz. No crash and I went into Win 11 to run CPU-Z.
CPU-Z spat back these numbers:
MEMORY TAB
Uncore freq: 4000Mhz
DRAM freq: 1900Mhz
SPEED TAB
Max bandwidth: DDR4-4000
A bunch of JEDEC numbers which I can provide if necessary but they seem unrelated.
My questions:
a) Why did the PC crash at BIOS setting 4000Mhz, the rated speed of the RAM, but not at BIOS setting 3900Mhz, and did I really solve any problem or just kicked it down the road? Was there a better way to handle this?
d) What is CPU-Z saying? Why is my DRAM speed half of my uncore speed? What number should I use?
Thanks!
One thing that I did not take note of (because I did not know it existed) was to check memory timings. I had assumed this was automatic. I have no idea what the original timings were.
However, I do know from my hefty invoice that I have Teamgroup's Xtreem 2x16GB 4000Mhz DDR4 RAM. I also UPGRADED to 64GB of RAM by adding 2 more 16GB banks of the EXACT same model RAM.
What I did not anticipate was that if there were any adjustments ever made to the RAM, it would have been gone when I upgraded the BIOS. So without any knowledge of what went before, when I learned of XMP profiles, I went into BIOS and sure enough, XMP was disabled, and speed was 2400Mhz. Okay, no biggie, its an Aorus 590 motherboard, so even easy mode you can one-click enable XMP, which I did, which changed the RAM speed to 4000Mhz and instantly crashed the PC on next reboot. Tried a few more times, crashing each time, then gave up, entered the BIOS and set it to 3900Mhz. No crash and I went into Win 11 to run CPU-Z.
CPU-Z spat back these numbers:
MEMORY TAB
Uncore freq: 4000Mhz
DRAM freq: 1900Mhz
SPEED TAB
Max bandwidth: DDR4-4000
A bunch of JEDEC numbers which I can provide if necessary but they seem unrelated.
My questions:
a) Why did the PC crash at BIOS setting 4000Mhz, the rated speed of the RAM, but not at BIOS setting 3900Mhz, and did I really solve any problem or just kicked it down the road? Was there a better way to handle this?
d) What is CPU-Z saying? Why is my DRAM speed half of my uncore speed? What number should I use?
Thanks!