Do all ram kits support xmp?
Do all ram kits support xmp?
hi, i have an older system and have recently decided to put an extra ram kit (different modules) in my system but have noticed that it doesnt have an xmp profile, if i take out my old ram and go to bios there is no xmp option but if i put both kits in there is xmp option. if i enable xmp and try to run ram at 1866mhz, which both kits are rated to run at, it fails to boot however if i set it to manual and put them at 1800mhz it works fine.
so my questions are, is there a way to get both kits to run at 1866mhz and if there is, is it actually worth doing.
my specs-
asus maximus hero 6 motherboard (z87)
i7-4790k
8gb corsair vengence pro series (2x4gb)
16gb yongxinsheng (2x8gb) (this is the one im seeing no xmp option)
asus strix rx580 oc 8gb
corsair cx 750 psu
thanks
if you use the 2x8Kit 1866 version, you can align the xmp voltage for dram while keeping the same timings as the 2x8gb models. I think combining various capacities in ram and pushing it to high speed requires some adjustments like tRRD, tWTR, tFAW, etc. However, based on my experience, it’s better to stick with the default jedec settings since 4x8 would be ideal for better timing and performance. Not every ram chip and pcb are identical, making this a challenging task. The biggest issue is that smd caps can degrade due to different timings—something I encountered multiple times during drdr3 days when no voltage changes were made, just simple timing tweaks on 4 and 8gb ram, which failed for the 4gb model because of a mismatched pcb, and I had to adjust the timings again.
You begin facing challenges with two distinct kits.
Ram is sold in sets for a specific reason.
A motherboard needs to handle all the RAM according to identical voltage, case, and speed requirements.
The internal design is tailored to the capacity of the kit you receive.
Ram from the same manufacturer and part number may vary in manufacturing over time.
Certain motherboards are particularly sensitive to these changes.
This becomes more complex when multiple sticks are used.
It’s essential to match the RAM for optimal performance.
Sometimes, you can offset errors by adjusting the RAM voltage on the motherboard BIOS, provided your board allows this. Z87 should work in that case.
XMP settings offer a quick way to configure specs for achieving advertised speeds from the module.
It’s unlikely both kits will apply the same settings automatically.
You might be able to boost speed from 1800 to 1866 by slightly increasing the RAM voltage beyond the 1800 level.
If the system boots, run memtest86+.
It launches from a USB drive and doesn’t require Windows.
You can find it here: Memtest86+ | The Open-Source Memory Testing Tool
Memtest86+ is a powerful, free, open-source memory tester for 32- and 64-bit systems (supports UEFI & BIOS).
memtest.org
If you complete a full scan with no errors, your RAM should be functioning correctly.
Performing additional passes occasionally can reveal problems, though it takes longer.
Unless you strongly suspect a RAM issue, it’s probably not worth the effort.
This is correct. On my current build my kit doesn’t seem to have that ability. But I need to build a cheap system for my wife later on the replace her existing old Dell windows 10 pc. So when I do that I think I’ll pass my ram to her since she’s just doing office work etc on it.