Generating XMP profile for two slightly varied sticks
Generating XMP profile for two slightly varied sticks
I have two Kingston HyperX Fury DDR4 8GB sticks in the same channel. I’m not very familiar with RAM, but I can help you set up an XMP profile for them. The model numbers you provided are HX421C14FB2 and HX430C15F3. Since the spec sheet site is down, you might need to check the manufacturer’s documentation or contact support for the latest guidelines. Let me know if you’d like step-by-step instructions!
You should set the speed to match the slower stick, specifically the 2133 model. If your system supports using that preset, apply it. Otherwise, save the RAM configuration for that stick. The 3000 model can handle downclocking without issues. To boost performance further, you'll need to increase its speed, which means overclocking the 2133 stick—though the outcome is uncertain.
Check the schedules and delays carefully. It’s better to align both to the slower timing. The numbers you mentioned—1.2v and 1.35v—indicate different performance levels; matching them helps avoid issues.
The CL of the 2133 model is actually lower than the other one, so I might be "overclocking" it. The specifications are listed here - https://www.kingston.com/dataSheets/HX421C14FB2_8.pdf and https://www.kingston.com/dataSheets/HX430C15FB3_8.pdf
CL is expressed in clock cycles rather than absolute time. 2133 CL14 is significantly slower than 3000 CL15 in terms of latency, as the former takes roughly 13 nanoseconds while the latter requires only 10 nanoseconds. No matter how you look at it, the 3000 CL15 is much faster.
I've just set up profiles with the following parameters: 2133MHZ at 1.2V CL 17 Trcd 17 Trp 17 Tras 34. Also experimented with 2133MHZ at 1.2V CL 15 Trcd 17 Trp 17 Tras 32. Everything else is configured to auto, it functions normally but during reboot (unplugging, not from Windows) the machine still toggles on/off three times before starting.
Restarting multiple times during memory adjustments is typical as the motherboard and CPU train memory. After completion, the system should function properly unless this behavior repeats each time it powers on.