Windows fails to recognize some RAM when it's set to manufacturer settings - X99a MMO
Windows fails to recognize some RAM when it's set to manufacturer settings - X99a MMO
Hi,
I have a system that I'm not very familiar with overclocking. Could you give some advice?
I have an i6850k with 32gb Gskill 3200mhz C16 Trident Z, GTX 1080ti MSI, MSI X99A Pro carbon Mobo, and Corsair H115i. I overclocked it to 4.2ghz at 1.33 volts (it’s high, but my RAM seems to need this speed because of the 32gb and 3200mhz). I also changed VCCIN to 1.93, following a forum suggestion.
The issue is that Windows isn’t recognizing all my RAM. At 2133mhz it works fine with the allocated slots, but when I enable XMP and the RAM overclocks to 3200mhz, only 28gb shows up.
Any tips would be greatly appreciated.
King Dranzer:
Is it a 8 x 4GB kit where one 4GB stick isn't functioning correctly? It seems like a 4x8GB quad channel setup. I made some adjustments. I ran memtest 86 and tested each stick individually—no signs of RAM problems. The problem was setting the frequency to 3200mhz with my X99a board (I've heard those boards don't handle anything above 2666 MHz, especially in quad channel). I lowered my RAM clock speed to 3000mhz. I also adjusted the SA settings and IO voltage, and suddenly everything worked perfectly—passed memtest twice and detected all 32GB.
Now I'm not hitting 3200mhz, but I managed to overclock to 4.2GHz and still ran at 3000mhz in quad channel without any complaints. I might experiment with latencies later, but for now I'm satisfied.
Using a 4 x 8GB package means either 32GB or 24GB depending on configuration, and when overclocking, if one stick fails it should drop to 24GB. The display showing 28GB indicates that half of a RAM stick is being detected, but the second half isn't recognized.
King Dranzer shared his experience regarding the 4 x 8GB kit setup. He explained that it should provide 32GB of usable memory, which is acceptable. If overclocking is needed and one stick fails, it should drop to 24GB. He noted that displaying 28GB indicates that half of a RAM stick is recognized, but the second half isn’t detected. He found this behavior unusual. He tested each stick at 3200mhz and confirmed they worked fine. Memtest failed on all sticks at the same speed, but downclocking to 3000mhz resolved the issue. He also mentioned that some users managed to run it at 3000mhz after updating their BIOS, while others saw improvement at 3200mhz once the BIOS changed. He ran Memtest86 on all sticks at 3000mhz without problems. At 3200mhz, the results were unclear. Ultimately, he decided to stick with 3000mhz for now and considered overclocking latencies to reach 3200mhz, but thought it might not be necessary yet since everything was stable.