I have recently upgraded the ram on my HP ProDesk 400 G1 (i7-4790S) computer from 2x4GB to 2x8GB using GSkill Sniper memory sticks, part number F3-1600C9D-16GSR. The new memory sticks were tested on another computer and known to be working OK.
My HP ProDesk recognises the correct amount of ram and boots successfully. However, after running cpu-z to check the ram settings it appears the bios has underclocked the ram from 1600 mhz to 1333 mhz. The original 2x4gb of HP ram were running correctly at 1600 mhz. I have checked the bios setting and confirmed it is now set at 1333 mhz. There are no bios settings that I can find that allow me to manually adjust the memory setting.
I have checked the HP manual which states memory must be:
- industry-standard 240-pin
- unbuffered non-ECC PC3-12800 DDR3-1600 MHz-compliant
- 1.35 volt or 1.5 volt DDR3/DDR3L-SDRAM DIMMs
- support CAS latency 11 DDR3 1600 MHz (11-11-11 timing)
- contain the mandatory JEDEC SPD information
From what I can tell the GSkill Sniper memory sticks meet these requirements.
On checking the Newegg website, I found the following statement listed under the specifications for this memory:
- to reach rated memory speed, enabling Intel XMP profile or manual BIOS tuning is required
Is there an issue with my HP computer reading the ram settings? If so is there something else in the ram specifications that I should be looking for when selecting new ram for my computer?