NVIDIA 7800 Won't boot

[ph1re]

I just recently bought a 7800 GS OC AGP and now my system won't boot.

For my motherboard I have a MachSpeed (Same as Jetway it seems?) S755MAX

http://www.motherboard.cz/mb/jetway/S755MAX.htm
http://www0.shopping.com/xPF-M...hlon-64Bit-Motherboard

For my PSU I have a POWMAX 400w Max LP-8800D

http://www.powmax.com/8800D.htm

Now, for my motherboard I set the AGP volts to 1.8v which is what I read somewhere that the videocard I bought needed. Now I can't even boot with that videocard.

My bios for the S775 are A03 07-01-2004


I'm really bumming right now because I don't know if I bought a broken card on ebay (which I doubt I did because the guy seemed trustworthy. Or if my SiS chipset is not compatible, or if I just need to buy a new PSU. Please help.

 

[ph1re]

Alright, I contacted the seller and he said that supposedly the video card I bought (EVGA GeForce 7800 GS OC 256mb AGP) requires 0.8v and I found out that my motherboard only has 1.5 to 1.8.

Would this be the reason my videocard refuses to boot?

I don't want to buy a new motherboard (very low budget) if it's not going to fix the problem.

 

[almcneil]

Check the manuals for your MoBo and see what the voltage tolerances are. You might be able to adjust one or the other. You can find pdf manuals for them at the web sites for the manufacturers.

 

[pdyckman@comcas]

Yeah..that higher voltage situation is no joke. You may want to have that 7800 checked somehow. This may be the reason that this particular graphics processor may never boot again. Does your board have integrated graphics that you can use? I mean can you return the pc to it's original config./see if it still works/and go from there. Post all the info. that you can. Good Luck. It'll work out, don't worry.

 

[ph1re]

Yeah, I'm using my 6200 right now to check forums/read website after website after website. So...I'm going to try to set the mobo to AGP4x and see if the 7800 will accept that configuration since my motherboard must not work on 0.8v
which is 8x. The motherboards I was looking at getting would be the http://cgi.ebay.com/ws/eBayISAPI.dl...MEWA:IT&viewitem=&item=260139041777&rd=1&rd=1

 

[ph1re]

Yeah, setting it to 4x did nothing.