4GB RAM black screen

I have PC with Abit AX8-3rd eye motherboard (http://www.abit.com.tw/page/en/motherboard/motherboard_detail.php?pMODEL_NAME=AX8-3rd+Eye&fMTYPE=Socket+939) and I was upgraded RAM memory to 4GB (http://www.walmart.com/ip/Kingston-Technologies-1Gb-Ddr-pc3200/5614487).

PSU Modecom 620W (http://www.itbankeurope.com/info.php?part_number=MC+620+CARBON&lng=en&w=1&s=20263).

When I was upgraded RAM PC worked fine and after ~2 months starting PC it shows

black screen something about BIOS error, but after restarting PC starts normally. After some time it

happens more. And there joins new problem. Blue screen with error dump. So I was clear CMOS and after

then PC works fine, but some minutes till blue screen. I think maybe it was faulty BIOS and I changed BIOS to new one.

Mysterious problem still exist. I was check RAM modules every is good condition. PC work with 1GB RAM in

any slot or 2GB in free slot between, but PC don't start normally. After first start boots black screen with

blinking underscore in left top of screen and after restarting PC starts normally. With 4GB RAM POST code is

0.4. an 3GB and 2GB modules near-50. and another number was something about "start USB initializing".

Faulty BIOS I was try to upgrade with newer soft, but Abit home page BIOS software don't exist anymore

and google too. What kind of a mysterious problem it is? Can somebody help?
2 answers Last reply
More about black screen
  1. With all slots populated you might have to relax ram speed or change command rate to 2T from 1T in BIOS.
    Did you test the ram with http://www.memtest86.com/download.html
  2. RAM speed in BIOS by default is Auto. Booting PC with 1GB of RAM it's 400MHz and dual channel mode or greater than 1GB it's 333Mhz.

    Ok I will try your advise.

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