Asus M5A78L-M USB3 not show 16 gb of memory in BIOS

[kevingrade4]

How can I increase the amount of Ram my bios supports? The motherboard says it supports 32GB of ram in 4 slots. I put 8 GB of ram in each of two slots and the bios reports 8gb not 16. Anybody know why?

 

[kanewolf]

Did you check the users manual to see WHICH slots to put the two sticks into?

 

[kevingrade4]

Did you check the users manual to see WHICH slots to put the two sticks into?

Thanks for helping. No. I don't have a manual and I didn't look it up. I didn't think it would matter, There are 4 slots. Board states max. 32 GB memory. 32/4 =8. I thought I'd be fine with 2 8Gb sticks. I'm thinking it's something to do with the processor allowing max memory, but I just don't know. Board allows overclocking and access to maximum cores so I'm thinking you may need a certain level of processor to access full 32Gb memory. Again, I just don't know.

 

[kanewolf]

Did you check the users manual to see WHICH slots to put the two sticks into?

Thanks for helping. No. I don't have a manual and I didn't look it up. I didn't think it would matter, There are 4 slots. Board states max. 32 GB memory. 32/4 =8. I thought I'd be fine with 2 8Gb sticks. I'm thinking it's something to do with the processor allowing max memory, but I just don't know. Board allows overclocking and access to maximum cores so I'm thinking you may need a certain level of processor to access full 32Gb memory. Again, I just don't know.

The manual also says to use the BLUE slots first....

 

[kevingrade4]

Thanks, I'll try it. Something to be said for reading the manual....

 

[kevingrade4]

That would have been a great fix! Unfortunately, they are already in the blue.

 

[kanewolf]

That would have been a great fix! Unfortunately, they are already in the blue.

What I would recommend now, is to get Memtest and verify functionality of each stick one at a time. First in one blue slot then in the other. Let each stick run for a full pass in each slot. That means 4 different runs (2 sticks x 2 slots). See if that identifies any consistent symptom.

 

[kevingrade4]

Thanks. Will do. Bit of new info - Brand new motherboard - just opened it last night. Brand new memory - just opened last night. That's why I'm leaning toward a config issue in the bios. My best bet is to download and read the manual but I thought someone on this board may have had the same issue with this MB.

 

[kanewolf]

Thanks. Will do. Bit of new info - Brand new motherboard - just opened it last night. Brand new memory - just opened last night. That's why I'm leaning toward a config issue in the bios. My best bet is to download and read the manual but I thought someone on this board may have had the same issue with this MB.

OK, with the additional info, you also need to check the DIMM compatibility charts listed on the MB makers webpage. You could have purchased RAM with a known incompatibility.

But with a new motherboard, it is unlikely that there is a BIOS issue. I would put one RAM stick in and update to the latest BIOS just to be sure. Starting with the latest BIOS on a new built is always a good idea.