DDR 5 RAM compatibility

[BigB@dJ@y]

I've just bought the following upgrade and installed this afternoon: -

• ASUS ROG B650-A Gaming Wifi
• Ryzen 7 7800x3d CPU
• Corsair Vengeance DDR 5 Memory (2x16Gb) CMK32GX5M2D6000Z36

The System works but takes a while to boot (app 1 minute checking memory) before starting up.

I have EXPO enabled

I think I may have ordered RAM which is not fully compatible, any ideas?

 

[BigB@dJ@y]

Yeah it's takes the same time consistently. I couldn't find the ram on the Asus compatibility list (qhl?) so assumed I may have picked up the wrong stuff.

 

[BigB@dJ@y]

Have you tried XMP? There's a few settings you can play around with like memory context restore and power down enable.

Check you've disabled any auto tune settings. The names change between brands - on Gigabyte it's high bandwidth and low latency.

Have you got your memory in the right slots? It should be the 2nd and 4th slots (slot 1 is closest to the cpu).

Yep, dimms in the rights slots (2 & 4), I have changed the MCR and this seems to have reduced the boot time to something like I'm used to. I have switched between EXPO and EXPO II but not seeing much difference.
Should I be enabling PBO?