Bios ram table mod

[Lost_N_BIOS]

8GB is not going to work well at all if you cannot set tRFC above 78 (That's even too low for many 2GB modules if using 8GB). 52-72 is more ideal for pushing tight timings on 1GB modules, 60-88+ for 2x2GB, with 4x2GB I would want to set at least 88-120 probably. Sorry, I thought you had 4GB modules there at first. So there is one of the main issues. Fully loaded ram slots are tough to run on older system like this, especially if you cannot raise timings high enough, or don't have direct access to the more important timings like I mentioned.

Editing SPD may work, if the BIOS will allow the higher programming timings to load in the background, but I doubt that's possible or it would be working now for tRFC since I'm sure it's default programming is above 78 for tRFC.

If you have "Static tRead' setting that could be causing issues if set too low too, set that to 9-11 until you sort things out, 5-6 is tight, 7-8 still pretty tight for 4x1GB or 2x2GB, so 9-11 probably best option to loosen this up if you have the setting available.

Check in AIDA64 (Motherboard > Chipset > NB then look at current timings and find tRFC) what is the current tRFC timings at 1600 even? You can also check with HWInfo64 on the little CPU-z like window tRFC is on the bottom right corner, or in the large window go to memory but don't expand it, just select the memory entry and look at the timings tRFC and tFAW (if given) at bottom tRRD right above those two.

Yes, for these boards, X38/X48 and even P35, using 4GB modules it a pain sometimes, especially at high speeds with limited access to proper memory timings, or like you case access to the timings but then too low of a max allowable setting limit.

What is the board, I have all Abit BIOS. I want to check BIOS to see if you have Vtt voltage option, MCH Strap, memory strap options etc.