Problem with "Intel D845GVSR" mother board with 1GB... (by 5 users)

Sounds like one of the RAM modules is damaged.  Have you tried running on
one module, each one, one at a time?  IOW, is the problem *only* occurring
because you use one module, OR, when you specifically use only one of the
modules (either one)?

I would recommend downloading and running memtest-86 (
http://www.memtest86.com ) too, as a cross-check against mtinst.exe.  It's
FREE, easy to use, and just requires creation of a bootable floppy.  Boot
the floppy and let it run through several passes, preferrably overnight.  If
the memory is damaged (or overclocked beyond spec and not capable of
sustaining itself), memtest will often find it (i.e., report errors).  If
you're not overclocking, then it's probably a bad RAM module.  I recommend
testing each module individually, then together.

It's also possible the SPD (Serial Presence Detect) feature is reporting
incorrect information, OR, your motherboard is not interpreting it
correctly.  SPD is how the RAM and motherboard "negotiate" the DRAM timings,
so that each configures the other properly.  If this information is conveyed
incorrectly, your DRAM timings may be overspec'd, and thus not capable of
obtaining stability.  In that case, you might need to manually reduce the
demands on your memory by increasing DRAM timings (e.g., CAS latency).

Btw, are these a "matched" pair of DIMMs?  IOW, are they identical in terms
of brand, spec, timings, etc.?  Obviously if NOT, you'll have to run them at
the lower of the two specs.  Again, SPD has been known to be fooled by this
type of situation.

One other possibility is a poor or failing power supply.  Especially w/
today's high-performance memory, and GOBS of it, you want a strong,
dependable power supply (prefer Antec and Enermax myself).  A cheap power,
particularly on the 3.3v rail, sometimes cannot deliver enough power to
support the RAM, or do it without fluctuations.  You want a strong, steady
power delivered to the RAM, or it can lead to instability.

HTH

Jim