Problems, DRAM or Powersupply?

Question

I recieved my components lastnight and proceded to build my new pc.
I am (sometimes) recieving a dram timing too tight message (timings are 2.5,3,3,7), but if I try to make any changes in CMOS my PC will not post after I save and exit.  This is if I make any changes related to memory/system frequencies.
When the PC does load Windows I am seeing very poor performance in benchmarks.  In 3dmark 2001 I am seeing results close to what I had with my P4 1.6 with a Geforce4Ti 4200.  
In Sisandra the processor bench returns very poor results, the memory bench looks ok on integer aEMMX, but pretty low on Float aSSE.
Could it be that the 12v amps is out of spec or would a problem with the memory be causing my problems.

Answer 1

Well it's Not your +12V Rail that I am Concerned about, As Much as I am Concerned about your +3.3V Rail , I am Afraid that this is where your Problem is.....Although your +12V Rail being at 18 Amps Rating is Right on the Borderline as far as the +12V Rail is concerned, Your +3.3V Rail (Which By The Way is the Power Rail that the Memory Relies on) and your +3.3V Rail Should Be Around 30 Amps......Now since your Signature Says Neo (P), I am assuming that you Have a Board Similar to my MSI-i865PE-PFISR, The Very First thing that you Should do, is to go Into the BIOS, and on the "Frequency And Voltage" Page, I want you to Increase the DRAM (VDIMM) Voltage to at least 2.65 Volts, and if this is Not Stable, try 2.70 Volts, But I really think that you Should Invest in a Quality PSU, Like an Enermax 465 VE, or a Antec 480W True-Power.....In the Meantime,  Increase the Memory Voltage as I said, and Try to Correct your Signature, so Others will Know Exactly What Motherboard you Have ...And I want you to Plug your System Specs. Into this, and tell me, what your Combined +3.3V and Your +5.0 Wattage Should be, along with your Total Watts>>>> http://www.adecy.com/psu/   ................Sean REILLY875