|Obviously, something has changed since your first post and you are now able to get into the bios Setup.|
"My RAM is DDR 400 (PC3200). In BIOS it is set at 200 MHz. "
Is that on a different mboard?
If it is, that does NOT apply to your GA-MA78GM-S2H !!!
Your GA-MA78GM-S2H mboard CANNOT use DDR ram!
You need to do some reading.
Read your mboard manual!
Differences between DDR and DDR2 ram:
- it requires a higher voltage - it may not work at all in your mboard because of that alone
- the notch in the bottom of the module on a DDR module is in a different place - a DDR module cannot go all the way down in the ram slot
You have specified specified in your signature in your first post and several other posts:
"4GB Patriot DDR2 1066"
From the newegg page you pointed to
"Other Thoughts: Get the RAM that the manufacturer certifies to run at 1066. Its hard to find because the list isn't on Gigabyte's USA site, you have to go the the TW (taiwan?) site (last I checked anyway). I took a risk and got some different 1066 RAM because at the time Newegg didn't have the right kind. I ended up having to clock it down to 800 to make it stable. My fault for being impatient."
There is NO Patriot 1066 ram listed for this model in the list of tested and approved modules for this mboard:
There ARE other brands of 1066 ram listed for this model, including Kingston.
A NOTE in RED says:
Due to AMD AM2+ limitation, DDR2 1066 ram is only supported by one dimm per channel
That note is about something you will probably find info about in your mboard manual - you probably need to install 1066 ram in certain slots!
The manufacturer often does not test all possible modules, or the list of modules may be outdated. In that case, if you look up the module you were thinking of using or buying on the web site of the ram manufacturer by using your make and model number, if the module ID string is found on a list of modules compatible with your model, then it IS definately compatible with your mboard.
The Patriot memory configurator has NO listing for your mboard model, or any other Gigabyte AM2+ mboard model:
Therefore - your Patriot ram MIGHT work in your mboard properly, but there is no official info that I can find that it will for sure!
It is foolish to buy ram without checking out whether it is listed as compatible with your mboard model before buying it!
The info in an ad is often insufficient for you to be able to determine whether it will work in your mboard for sure!
E.g. All these Kingston modules are definately compatible with your mboard, and some of them are also in Gigabyte's list of modules that have been tested in your mboard model and DO work properly in your mboard:
Some ram does not strictly adhere to the standard JEDEC specs most bioses use for their default settings. In that case, you must custom set the ram timing specs in the biosSetup to that specified on the module - the 4 timing numbers - they must be the same as those stated for the module, which may be printed on the module itself, or if not in the specs for the module, or higher (= slower).