My monitor doesnt detect my pc

Hi,

here is my story,

i used to have a old pc

amd athlon 64 x2 4200+
ati 3450
2 gig ram
msi k8n neo4 platinum
300watt psu

as you can already see its old, however i made the mistake of buying a new ati 5770 gfx card for this pc. Everything went well i uninstalled my old gpu, removed it, put the new one in. But when i turn my pc on the screen works for 3min and becomes jaggid and unresponsive. I tryed to restart but to no avail.
I figured it must be my psu, so what did i do? i bought a new psu, a Corsair 600W CX PSU - 2x PCI-E 6x SATA.
So i took out my old moldy psu and put my new glorious corsair in, now here is the problem my pc starts fine but my monitor, which is connected via a dvi converter to my new gpu, doesnt detect my computer.

However before i had installed my new psu it detected it find, it just could not run it.

So now here i am asking my self WTF? is going on and what should i do.

Help would much appriciated, thank you.
3 answers Last reply
More about monitor doesnt detect
  1. So i took out my old moldy psu and put my new glorious corsair in, now here is the problem my pc starts fine but my monitor
    , which is connected via a dvi converter to my new gpu, doesnt detect my computer.

    1) How do you know it starts up fine?
    2) Some monitors have a button to switch from VGA to DVI to HDMI have you tried it?
    3) Try a different monitor.
    4) Bad new power supply.
  2. thanks for help i think i found the problem :D
  3. I didn't hear any mention of uninstalling old drivers and installing new ones either :)
    Moto
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