no bios post with 3 gpu's

vectisitch · 25 Jan 2012 at 11:18

hi,just rebuilt my rig and added a third gtx470.now the pc takes ages to boot and does'nt show the bios screen.it's just black then goes straight into windows?any ideas? i can't get into the bios

J.D · 25 Jan 2012 at 11:26

Have you reset the CMOS?.

Defy Belief · 25 Jan 2012 at 11:53

*Delete* nvm didn't real the whole post.

Deception · 25 Jan 2012 at 13:11

Does tapping the required key for BIOS(F2, F10 or Del depending on the board), bring up anything?

Kipper67 · 25 Jan 2012 at 13:40

How many screens have you got attached? Have you checked the outputs not going to one of them?

On my newly built system which has a monitor and TV attached for movies, the BIOS appears on the TV (and I don't usually see it as its on a TV channel) and it only switches to my monitor once windows starts to load.

ALXAndy · 25 Jan 2012 at 14:16

It sounds like you are not using the primary header. It can be anywhere on a multi GPU setup tbh. IIRC it was the second port on the second GTX 295 for me.

Harpss1ngh · 25 Jan 2012 at 16:16

Not the power supply as you got a decent one...Try taking them out and try them one by one? Do they all post individually? Try reconnecting them and making sure they're connected into the slot properly.

Like ALXAndy said, it could be that the video is outputting from one of the other cards, try switching your video cable between the cards until you can get a picture?

ALXAndy · 25 Jan 2012 at 16:30

If you wait until you would usually get post and then press PAUSE BREAK it should stop your system at post, allowing you time to find the correct output

reflux · 25 Jan 2012 at 16:31

Kipper67 said:
How many screens have you got attached? Have you checked the outputs not going to one of them?

On my newly built system which has a monitor and TV attached for movies, the BIOS appears on the TV (and I don't usually see it as its on a TV channel) and it only switches to my monitor once windows starts to load.

Mine does the same thing, very annoying.

vectisitch · 25 Jan 2012 at 18:34

thanks for the ideas guys.i reset cmos and reseated all the leads and it's ok.easy to forget the basics .

vectisitch · 29 Jan 2012 at 11:48

spoke to soon.all 3 cards are working in sli and battlefield 3/2 work fine with no crashes,but i'm not getting any bios post so i can't get into bios.it stays blank then goes straight into windows.if i press delete to get into bios it just stops the post all together and i have to restart???????what is going on

gareth170 · 29 Jan 2012 at 12:14

maybe the intel gpu is enable/set to primary..

connect a monitor to the motherboard dvi and see if you can get into the bios.

edit your motherboard doesn't have a onboard dvi?

vectisitch · 29 Jan 2012 at 12:41

i disabled the intel gpu when i did get into bios

vectisitch · 29 Jan 2012 at 12:43

the only way i can get into bios is to disconnect the power leads to 2 gpu's and take of the sli connecter

vectisitch · 29 Jan 2012 at 12:51

another bit of info.the debug led stops at 34 when it does'nt boot

gareth170 · 29 Jan 2012 at 13:15

make sure the monitor/s is connected to the right card,

[timko] · 29 Jan 2012 at 13:27

vectisitch said:
if i press delete to get into bios it just stops the post all together and i have to restart???????

When it "just stops" have you tried moving the connection for your monitor between the various outputs on all 3 of your 470 cards? It will definitely show POST on one of the outputs, you just have to find it. If this doesn't work by pressing DEL then your only choice is to do this...

- Card 1 - DVI port 1 - test for POST image on screen
- Reboot
- Card 1 - DVI port 2 - test for POST image on screen
- Reboot

- Card 2 - DVI port 1 - test for POST image on screen
- Reboot
- Card 2 - DVI port 2 - test for POST image on screen
- Reboot

- Card 3 - DVI port 1 - test for POST image on screen
- Reboot
- Card 3 - DVI port 2 - test for POST image on screen

If you're connecting via the HDMI port then this process will be quicker as there's only one per card.

Do you have more than one monitor/TV connected?

vectisitch · 29 Jan 2012 at 13:38

only 1 monitor.i have tried all the outputs.i have just updated to a beta driver and selected clean install.it removed the old driver and then went blank and stayed there.i had to restart.i took off the sli bridge and it starts fine with bios post.tried different sli bridges.

vectisitch · 29 Jan 2012 at 13:58

ok,had a fiddle.i put the sli bridge back on all three cards but took out the power leads to the third card i added and it posted fine with the bio0s post showing up.when i put the power leads back i get nothing.wierd as i said all three cards work fine in tri sli gaming but i just get no bios screens

vectisitch · 29 Jan 2012 at 20:19

any ideas guys? this is driving me mad