|OK, I have done some research on your board and RAM.|
The Kingston RAM should be OK but you can ONLY run 2 sticks. The correct slots are listed below.
Let me say that your Asus board is considered an enthusiasts board. As such, you need to learn how and what to tweak in the BIOS settings. If you read the manual carefully you should find most of what you need to know.
Look at all the links below. Especially the ones concerning your motherboard. Your when populating the RAM slots you want to run matched pairs. Asus recommends running LESS than 3GB of total RAM. As I already stated you can run 3 sticks of DDR 400 as the controller can't support it. You could clock it down to 333 but there is no advantage. Send one stick back, if you can.
Read the memory section of the manual and install only ONE stick of RAM at first in the slot specified in the manual. Set the RAM voltage and timings manually to Kingston specs. Test with memtest86 to see if there are any problems.
If you still get errors then either something is wrong with the CPU or CPU settings or your motherboard may be defective.
If you read in the system specs section of the Kingston information it clearly states that when using DDR400 you can only use 2 1GB modules.
The excerpt below is from your manual.
When using two DDR DIMM modules, install into DIMM_A1 and
DIMM_B1 slots only.
• Always install DIMMs with the same CAS latency. For optimum
compatibility, it is recommended that you obtain memory modules
from the same vendor. Refer to the memory Qualified Vendors List
on the next page for details.
• Due to CPU limitation, DIMM modules with 128 Mb memory chips or
double-sided x16 memory chips are not supported in this motherboard.
Below is a link to your manual.
Below is a link to all the down loads for your board.