X870E Crosshair Hero Expo Not Posting BIOS 1104

[PatMcKrotch]

I can't set any version of EXPO on my MOBO.  I've waited a full day and nothing but black screen. 

9800X3D

4 DIMMs

G.SKILL Trident Z5 Royal Neo Series 48GB (2 x 24GB) 288-Pin PC RAM DDR5 8000 (PC5 64000) Desktop Memory Model F5-8000J4048G24GX2-TR5NS

Boot Drive

Seagate Firecuda 520 2TB Performance Internal Solid State Drive SSD PCIe Gen4 X4 NVMe 1.3 for Gaming PC Gaming Laptop Desktop - 3-year Rescue Service (ZP2000GM3A002) 

gaming Drive

Seagate FireCuda 540 GEN5 SSD M.2 2280 2TB PCI-Express 5.0 x4 3D TLC Internal Solid State Drive (SSD) ZP2000GM3A004

MOBO

ASUS ROG CROSSHAIR X870E HERO AMD X870E AM5 ATX motherboard, Advanced AI PC ready, 18+2+2 power stages, DDR5, PCIe 5.0, 5x M.2, Wi-Fi 7, USB4, AI Overclocking, Core Flex, PCIe Slot Q-Release Slim

[day187]

Hi

Couple of things

Have you got the latest bios?

Have you tried with just 2 dimms?

Also, try entering the timings and voltages manually as expo doesn't work with 4 DIMMs but should work with two, with two DIMMs you should see expo but I would drop the speed to 6400 and go up from there,

Day

[Silent_Scone]

HI @PatMcKrotch 

As above, you would need to remove one kit. Memory kits are binned and validated by memory vendors in the density in which they are sold, and combining and mixing kits is not supported.

Whilst manual tuning is always an option, it requires a deeper understand of memory overclocking. The concessions of which are outlined better in the following article