New psu/CPU and no post

So my specs are
I7490k replacing my i54590
H81m itx Mobo
8gb ram
Evga 850 psu replacing my 650w psu
Gtx 970

Now it all started when I got my CPU, I popped it in and the computer would boot but the keyboard, mouse, and monitors wouldn't power on and the PC would cut out and back on after about a minute or so. So I decided to go get a new psu. I install it and I get absolutely nothing when I hit the power buton. I was careful about being grounded and static esc. I'm at a lost. The 20(4) pin connector is in. The cpu connector is in. The two pcie are in for the GPU. Ram
M is in. I just can't figure what's going on.
Edit: I read somewhere that I may need to update the bios with the i5?
Reply to dumbnstuck
14 answers Last reply Best Answer
More about psu cpu post
  1. The course connector is in?
    Reply to SR-71 Blackbird
  2. Meant cpu
    Reply to dumbnstuck
  3. Put the old one back in flash the BIOS then put the new one in. The old CPU needed BIOS 1.60 the new one needs 1.70

    Flash the latest BIOS 2.30 with the old CPU
    Reply to Paul NZ
  4. Best answer
    You need this BIOS to support 4790K:

    Needs to be updated with your old CPU , then install your new one.
    Reply to SR-71 Blackbird
  5. As per usual im not home but would that make it mot react at all when i hit the pwr?
    Reply to dumbnstuck
  6. No. If the old cpu works then it'll work when you reinstall it. And once you update the BIOS the new one should work
    Reply to Paul NZ
  7. Im trying to find my thermal paste.. A search ill have to resume tomorrow. But now if popping In the old cpu doesn't work. Am i just screwed? I mean i got nothing left to give if that happens
    Reply to dumbnstuck
  8. Problem' i popped in the i5 and im gettimg operation but no keyboard. Mouse. Or monitors just like when i first put in the i7
    Reply to dumbnstuck
  9. Clear the CMOS take out the battery for a minute or two , sometimes that works after a PSU change.
    Reply to SR-71 Blackbird
  10. I tried the jumper and the battery, no change.
    Reply to dumbnstuck
  11. alright i repeated a couple more trouble shooting steps and im in bios, but now i have another question, it says i have uefi version p2.30, so do i need to downgrade to the 1.70 insta flash?
    Reply to dumbnstuck
  12. No 2.30 is the latest BIOS. Reconfigure the bios settings then save them
    Reply to Paul NZ
  13. she works she works! muhahhahahah
    Reply to dumbnstuck
  14. dumbnstuck said:
    she works she works! muhahhahahah

    Glad to hear awesome! :D
    Reply to SR-71 Blackbird
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