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10-29-2017 04:12 PM
I've recently upgraded the memory to two sticks of G.Skill RipJaw PC3-12800 (DDR3-1600). According to the HP and Compaq Desktop PCs - Motherboard Specifications, MS-7826 (Kaili), the motherboard should support both DDR3-1333 and DDR3-1600 DIMMs.
Using Speccy and UserBenchmarks, I"ve confirmed that the 1600s are only running at 1333. Confirmed that the BIOS (AMI 80.24) is the latest avilable through HP. No BIOS settings allow me to select an XMP profile to tweek the RAM speed.
Any suggestions for getting the full 1600?
10-29-2017 04:32 PM
Looks like it is a CTO machine which has the following options
Must select one of the following options:
8 GB (1 x 8 GB) DDR3 PC3-12800
10 GB (1 x 8 GB, 1 x 2 GB) DDR3 PC3-12800
12 GB (1 x 8 GB, 1 x 4 GB) DDR3 PC3-12800
16 GB (2 x 8 GB) DDR3 PC3-12800
32 GB (4 x 8 GB) DDR3 PC3-12800
Now, please try the following test: Pull out two new sticks and using CPU-Z or other tool to see which speed the existing RAM running.
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10-29-2017 06:18 PM
Some HP PCs when the memory in populated to 16GB then the clock frequency actually drops. This might be your situation. Additionally, all of the HP dimms for your model PC are CL11 and not CL9 as you have purchased.
As you discovered, XMP profiles are not supported. Typically using XMP, clocks and voltages both change.
Also missing from your post is the actual slots that you populated with the new dimms.
HP Envy 17", i7-8550u,16GB, 512GB NVMe, 4K screen, Windows 11 x64
Custom PC - Z690, i9-12900K, 32GB DDR5 5600, dual 512 GB NVMe, gen4 2 TB m.2 SSD, 4K screen, OC'd to 5 Ghz, NVIDIA 3080 10GB