Pentium 4 / P4 Extreme Upgrade not working

[DevilDude]

Hi all,
Sorry to be a pain (this it my first time posting here) but I was wondering if anybody could help.

Basically, I've tried to upgrade my system. At the moment it's using an SL6WH - socket 478, 800MHz quad pumped FSB @ 2.6GHz

(This - http://www.cpu-world.com/CPUs/Pentium_4/Intel-Pentium%204%202.6%20GHz%20-%20RK80532PG064512%20(BX80532PG2600D).html)

with a P4 Extreme Edition CPU -> SL7CH @ 3.4GHz

(http://www.cpu-world.com/CPUs/Pentium_4/Intel-Pentium%204%20Extreme%20Edition%203.4%20GHz%20-%20RK80532PG0962M%20(BX80532PG3400F).html)

When I plug it in it fails to boot (at all). Any idea what could be going wrong

Thanks for your help!
DD

[Guest]

Thought it might be a VCore / VID problem but turns out it was a bent pin... :-

Oh BTW, the isn't any info on this on the web (and I spent some time checking!) so I'll post it here in case somebody else is bothered - A Dell GX270 CAN take a P4 3.4GHz Extreme Edition (SL7CH) no problem, even although the official support list only goes to 3GHz

[Marcin]

Dell say about things which they tested. They test only those which they sale ... so as you said their mobos can support much more than is mentioned in specifications.