My board:

asus P5LP-LE (Limestone 1.04)
northbridge intel 945g
southbridge 82801GB 1CH7
socket 775

will i kill my pc if i stick a C2D in P4 board. My current CPU is a P4 3.0G HT 630 800Mhz. Will a C2D give me any real boost?

The c2d will give a big boost but it won't fit that I think. It's likely just to recognise the cpu as an unbranded one so it won't work properly but don't think it will destroy your machine but I'm still on socket 939 amd so it's conjecture on my part.

The Core2 would fit but it will not work. However you could get a Pentium D. Since that is supported by the motherboard. But Pentium D's are just a hot mess lol.
http://h10025.www1.hp.com/ewfrf/wc [...] =c00379422

http://h10025.www1.hp.com/ewfrf/wc [...] R1002_USEN

That is an HP board direct from Asus so hard to find data. It does have a 945G and the link I posted is the latest bios from HP and Asus. It says it supports newer Intel procs so update it and find out. It isn't going to damage the CPU just will or won't recognize it. Good Luck!

If you get the processor and it doesn't work a new MB that will work is fairly cheap and will be a much faster system.

Agreed. Pentium D's = BAD!

Thanks guys. By the way, the bios link above is for vista. I have xp.

The pentium D is cheap. The reviews on Tigerdirect are good. So the PD is a dual core? I stayed away from the D because of bad review a couple of years ago. Would a 3.0 Pentium D be worth $60 and would it give me any boost in performance? How about OCing it? Can i use my current stock fan?

EDIT: oops, the above post, posted as i was writing this.

What if i get a good cooler? Would it give any benefit? or should i just OC my P4 3.0 and wait for my new build this spring for a C2D?

http://h10025.www1.hp.com/ewfrf/wc [...] en&lang=en

Latest XP Bios...sorry

Pentium D's aren't much better than Pentium 4's unless you are photo editing/video encoding/multitasking and even then it's not close to a C2D. For gaming a Pentium D is the same as a Pentium 4.

I think it's worth and updating your BIOS and check sometime it may work,sometimes it won't recognize your C2D

a BIOS update and Pentium Dual-core E21x0 series would be much better than a Pentium D.

NP, thanks for the bios link. I have had a hell of a time finding them.

HP is telling me that the Pentium dual cores wont work with this board. Even tho New egg has boards almost identical to mine that support Pentium dual cores and C2Ds.

Edit: hp support is also saying that this board will take the Pentium D 8xx but not the 9xx. The difference is 90 - 65nm and 1M - 2M L2 cache.

I dont understand.

Not if you're running one of the many games that are optimized for dual-core.

The smalled the "nm" chips take less power and generate less heat. The larger L2 cache = better in most cases. As for the 8xx and the 9xx I'm guessing those are revisions of the Pentium D... which I still recommend you do not get. I doubt you will notice much difference between a P4 and a Pentium D.

It's still using netburst architecture though, and generally performs very poorly when compared a real dual-core chip.

*edit*

Of course.

rgeist554, sorry about the mixup.

-G

Pentium D's have been replaced by core2duos with the cache cut to 1mb. Old pentium D's might still exist but the e21xx series are core2duos.