custom built desktop post problems?

im in the process of building a custom desktop but have encountered some problems with the computer not being able to post, all parts were purchased new, i noticed the motherboard giving 3 beeps, i believe they were long ones and it would just do it consecutively until you shutdown the computer, based on the manual, it indicated a ram problem so i went ahead and ordered 2 new ones, this time, i referred to crucial.com for ram compatibility for the motherboard, the other time, i just bought the ram sticks by searching the motherboard model and ram upgrade. anyways, i installed the new memory, this time, it would not beep 3 times, its a different problem, it powers up all the way for like a few seconds, im talking about the fans spinning up all the way, then the cpu fan slow down as if the pc isnt getting enough power, the cpu fan will spin very slow, power supply, hdd, dvd burner still running, but no post. it does however give two short beeps, but based on the manual, i could not find anything that mentions two beeps for the bios codes. the motherboard model number is intel dq43ap. the processor im using is the core 2 duo e6300, 2 GB ddr2 pc2 6400 ram ( 800mhz dimms ), one sata drive, 1 dvd burner, onboard gma x4500 graphics, and hec 350 watt 80 plus bronze psu.

i have a feeling its the ram, possibly the cpu + ram speed and motherboard bios settings cannot work together, thus, preventing the system from posting. i did order a new cpu, the pentium e2200.

2014-04-30T17:59:17Z

i ordered the pentium e2200 because its supposed to work with the 800mhz ram sticks i believe by default and i know i ordered the correct ram sticks for the motherboard, i dont have that much experience in the computer field, i have built over 10 computers before, got all of them running myself with or without problems beforehand, but i have never encountered this particular problem, im just gonna guess that if it works, it was because of previous incompatible ram + cpu combination, if not...

2014-04-30T18:02:05Z

then i think its the motherboard thats damaged somehow, there is a short / surge always somewhere preventing the pc from working properly, the dimm slots are messed up, the bios is messed up, or faulty graphics chipset. other than that, i cant think of anything in particular.

pdl7562014-04-30T20:00:01Z

This link explains which processors and memory are compatible with that board. The E6300 as well as 800MHz non-ECC memory ARE supported.
http://www.intel.com/content/www/us/en/motherboards/desktop-motherboards/desktop-board-dq43ap.html

Also found this info on beep error codes for Intel boards.

◾You are getting 1, 2, or 3 beeps that indicate a memory failure.
•1 beep - Refresh Error (with nothing on the screen and it is not a video problem)
•2 beeps - Parity Error
•3 beeps - Base 64 K memory failure
•Reseat the memory.
• Make sure that the contacts on the memory and the socket are clean.
• Try removing one bank of memory modules at a time. Note: Some systems might need to have a memory module in Bank 0.
• Try using RAM chips from the same manufacturer with the same part number and speed.
• Check for a faulty memory module by trying the memory in a known good system.
• Trying known good memory in the system.
• Check the power supply and check for power fluctuations.
• Swap the motherboard.

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