New ram added not posting

Deranged42 · November 4

Hey i recently brought a pc it has aorus b650 ax v2 elite, 7800x3d, gigabyte 4070 super, deepcool 750 watt psu, 2x 1 tb m.2 gen 4 nvme and g skill flare x5, 2x 16gb, cl36, 36-36-36-96 1.35v 6000mts, i have seen my ram usage getting up to 30+ gb s so i brought another ram kit. A g skill trident z5, 2x 16gb, cl36, 36-36-36-96, 1.35v 6000mts, i have reset bios back to non expo to try install new ram, have cleared cmos and removed the battery whilst pc is unplugged, posted and started pc with both individual ram kits yet when i try turn on the pc with all four ram sticks in staggered slots, ie z5,x5,z5,x5 or opposite, my computer isnt posting.

Have you any idea why, is it not possible to run same timed ram kits by the same maker yet one is rgb and the other not?

RONOTHAN## · November 4

First off, 4x16GB of DDR5 is known to be an issue, and while it can work it's very much not worth the effort. If you want 64GB, get a 2x32GB kit.

Second, and the real nail in the coffin for this, these kits aren't the same. G.Skill kits code the memory IC they have on them on the label, and the Flare X5 kit has Samsung B die while the Trident Z5 kit has SK Hynix A die. Odds are these chips just will not play nice with each other, hence why the system won't boot. If you really want to try to get this to boot, you might have better luck by doing Z5-Z5-X5-X5 with each pair in their own channel since each channel can in theory train independently, though admittedly I've only ever had that help on Intel rigs and not AMD.

Return one or both of the kits and either get 2x32GB or hope you actually get the same IC in another 2x16GB kit (not recommended)