I have a Gigabyte ma790x-ud4p motherboard (latest BIOS—F-9). I can install Windows Server 2008 (R2, also) with only 4GB RAM and it runs fine. If I try to install the OS w/more than 4GB RAM, the install won't even finish—it hangs (but acts like it's going to finish—the progress bar just quits moving). If I add more sticks of RAM after the install is complete, the system is unstable. It reboots out of the blue and is just plain unstable.
Initially that was with an Athlon dual core 5200+ and Patriot memory (4 x 2GB). I looked on Gigabyte's Web site and bought memory that is approved for this motherboard—Kingston KVR800D2N6/4G (1.8V). With 1 of these sticks (4GB), same as before—everything works perfectly. Also same as before, if I put in more sticks, Windows won't even install.
What's even more interesting is that VMWare ESXi (a Linux-based OS) seems to install and run fine with more RAM (> 4GB).
What's going on here? Any ideas of what I can try? I'm trying to run this box as a virtual machine host, so I really do need the extra RAM (4x4GB). By the way, I'm also now running an Athlon quad-core CPU.
The RAM is rated at 1.8V and CL=6. The BIOS is set for auto-everything, so it's not showing the voltage. If I got to manual, I can adjust the voltage +/- .1 V. I can only assume it's running at 1.8V. The timing is CAS#=6 (6-6-6-12), so at first glance that looks correct, but I can't be sure of all those numbers.
When I put all 4 sticks in (16GB), Windows hangs partway through the login process, so I won't be able to run any memory test programs.
Load CPU-Z. Then click the SPD tab. What are the JEDEC table values at 400 MHz (and other speeds if you want to provide them)? You could also check the Memory tab as that indicates the current settings (except for the voltage).
You might not like my suggestion, but you should get a motherboard that is certified to work with those modules (if one exists). My first step would be to RMA the one that you have. Since the modules that you bought are on the QVL, then it should work. Since you tried 2 different CPUs with the same results, I presume that the issue isn't caused by the CPU. Regardless it will be challenging to get 16GB of RAM running properly on that platform. A 16GB server should normally be based on a Xeon or an Opteron, a server motherboard and server grade memory.
I run a few servers based on desktop motherboards with 8GB of RAM and they are stable. They are based on motherboards that are excellent for overclocking, but they are not overclocked to keep the systems stable.
I have no idea. Do you have any suggestions? I don't want to spend a fortune. It's just for personal use at home. I would be willing to spend a couple hundred bucks. Mainly I just need a stable machine that will use my 16GB RAM and will run my Areca 1220 RAID card. Built-in Gigabit Ethernet would be nice. I have a video card, so that's not necessary.
I know that quality P45 based motherboards can run 8GB (4 x 2GB) fine, but 16GB is more challenging. I own an Asus P5Q Deluxe that should be able to use G.Skill F2-6400CL6Q-16GBMQ (according to G.Skill and reviewers on Newegg). There are few reviews for your modules and only one runs 16GB on a MSI P45 Neo-3.