Mixed 2 brands of 3200mhz DDR4 RAM and its unstable

Posted by OrneryAppearance9132@reddit | buildapc | View on Reddit | 3 comments

I have a ryzen 5600 cpu and ASUS B550M-A AC motherboard.

I’ve been using 16 gb (2 sticks of 8) Gskill ripjaws 3200 mhz, timing is 16-18-18-38, 1.35v. Model number F4-3200C16D-16GVKB. They’ve worked great, but some games have been pushing the limit.

I had 16 gb (2 sticks of 8) corsair vengeance lpx laying around and thought I’d add them. They’re 3200 mhz, timing 16-18-17-36, model number CMK16GX4M2B3200C16.

Popped them in (g skill in A2B2, Corsair in A1B1) and it wouldn’t boot. Took the Corsair out, loaded into bios and disabled xmp and put the Corsair back in. This time it booted. I went back into bios to enable xmp and it would only boot into safe mode.

Asked chatgpt for some help, it told me to lower the speed to 3000mhz, which I didn’t want to do, so it told me to change soc voltage to 1.1 and dram voltage to 1.36v, and set the timing manually to 16-18-18-38. This didn’t work either.

Can someone smarter than me help?

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ItyBityGreenieWeenie@reddit

Put in one stick, reset your bios completely to defaults, then set memory timings to JEDEC, probably 2400 CL17-17-17 1.2V. Add the other sticks, boot and make sure in the bios both are JEDEC and go up from there in small increments. Use memtest86 to see if it is really really stable when you can high enough. I guess you would be lucky to get 3000 with higher cl and higher voltage. Be VERY careful with raising the voltages.

Could be it just won't boot on your system. 4 sticks is rougher than 2 and mixing brands is bad news.

Did you try the two kits separatly on this board? It could also be the board just won't work with one kit. Maybe try that first. Two in JEDEC, then XMP. Then the other two in JEDEC and XMP. Then all together in JEDEC and go from there.

Icy-Channel-8079@reddit

Rule 1 of ram, never mix them, ever.

nobleflame@reddit

You don’t mix RAM. End of story.