bdan :
I know it's "old" technology, but I'm looking for a little advice on the Pentium D CPUs.
I have an ASUS P5LD2 deluxe motherboard currently running a Celeron D cpu. The "best" processors this mobo supports are the Pentium D 8XX and 9XX series.
Some of these processors are really cheap now; I can't afford a newer motherboard AND the newest CPU right now.
Any thoughts as to the best model? 9X0 vs 9X5s? (9X5 models: no Virtualization Technology) revisions? Overclockability w/ Asus software?
Check the pcb revision, it might support higher with a bios flash:
LGA775 socket for Intel® Core™2 Extreme / Core™2 Duo / Pentium® Extreme / Pentium® D / Pentium® 4 / Celeron® D Processors
Intel EM64T / EIST / Hyper-Threading Technology
New power design supports Intel next generation 04B/04A & 05B/05A CPU
*Only PCB R2.0(or higher) support Intel® Core™2 processor
http://support.asus.com/cpusupport/cpusupport.aspx?SLanguage=en-us&model=P5LD2
Since you didn't mention the PCB revision, I'd thought I'd recommend it, just in case you have a board that does support a C2D "Pentium".
If you don't have the newest PCB revision, then Newegg has these Pentium D's:
http://www.newegg.com/Product/ProductList.aspx?Submit=ENE&N=2010340343+50001157+1050716915&name=Pentium+D
Unless you give Pricewatch vendors, or Ebay a try, there aren't that many Pentium D processors available. You might be able to find a pulled processor (ie used) Pentium D for a better price than the boxed CPU's at Newegg.
In your situation, you have DDR2, so all you might need is a new motherboard and a new CPU (what's the speed of your DDR2?). Note that even a Pentium D 935 falls short of the cheaper Intel and AMD dual cores on Tom's CPU charts.
A friend gave me an ASUS P5RD1 board with a Pentium 4 630, and I considered getting a Pentium D for it just to have a backup PC in the bedroom (our 3 Athon X2's are in the living room). Well, it didn't even beat my wife's Athlon X2 3800+, let alone the X2 4600+'s that my son and I have.
So, my advice is really consider putting the $99 into a new CPU with a new motherboard. Maybe you'll have to spend $150 instead, but it will be worth it in the long run.