My monitor doesnt detect my PC


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.
7 answers Last reply
More about monitor doesnt detect
  1. You may have a faulty card, I got one the other day, a brand new GTX460 DOA!

    Have you got another machine you could try it in?

    Does your old card still work with your new PSU?

    Have you tried both DVI ports?
  2. solved the problem but that you so much anyway.
  3. What was it?
  4. im kinda ashamed to say it, i forgot to connect my cpu to power supply :(
  5. Don't feel bad, I've been building rigs for five years and forget CPU power sometimes. ;)
  6. never going to forget that again ! lesson learned :D
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