According to the compatibility tool accessible through that (discontinued) boards support site here: http://processormatch.intel.com/COMPDB/default.aspx that combination is 'not compatible'. Try for yourself and see all the processors that are compatible with that board but remember you'll have to select 'discontinued products' at the top of the page for the 3 series boards to even show up.
••Intel® P35 Express Chipset (Configurations: 3)
•••Intel® P35 Express Chipset with 82801IB I/O Controller Hub (ICH9)
•••Intel® P35 Express Chipset with 82801IDH I/O Controller Hub (ICH9DH)
•••Intel® P35 Express Chipset with 82801IR I/O Controller Hub (ICH9R)
And from this:
Intel® P35 Express Chipset
•Intel® 82P35 Memory Controller Hub (MCH)
•Intel® 82801IR I/O Controller Hub (ICH9R)
What is the problem? Maybe whith new BIOS version, E5700 works?
It looks like the board may not be physically capable of handling the FSB multiplier required for a 3 GHz CPU and only 800 MHz FSB. If you have a look at all the supported 'fast' CPUs, they all work with an FSB of at least 1066 MHz and only the slower one use 800 MHz. There may be other differences as well but suffice to say that if a newer BIOS revision did support that CPU, it should have been added to the list of compatible CPUs with a minimum BIOS revision statement alongside.
If you bought both the CPU and board together maybe the supplier will take back the unused CPU and swap it for one of the slower E5xxx series CPUs that are listed as compatible? I hope that answers your question and to pre-empt a 'can the board be modified to suit the CPU', I suspect only Intel would be capable of that and even then for a discontinued product this old, it won't happen - I imagine they'd rather you bought a shiny new motherboard to go with your recent CPU. Good luck trying to swap the CPU (or motherboard)!
I try buy other accessible processor for old motherboard, but only E5400-E5500-E5700 processor are disponible.
What do you mean with that last word? The Intel website shows the E5400 as 'compatible' with the DP35DP (using the link I gave previously). If you've already used both CPUs then you'll need to try and sell the one you don't want 2nd hand or if they both worked before the swap, then swap them back again - that's the simplest solution! If my replies have helped then can you mark it as answered please.
Thanks for the info here! Because of it I could find the compatible processors to my DP35DP;
In terms of an upgrade from a Q6600, a Q9550 looks tempting, if I can find one (and I think I can, although its rare). For someone who doesn't want to reformat or change from XP, what do you think of this idea?
For someone who doesn't want to reformat or change from XP, what do you think of this idea?
Not a good idea. I think you should gather together your installation CDROMs and DVDs and research what's required to perform a fresh install on a newly formatted HDD. Although there are other things you can do software wise to speed up a sluggish PC (such as defragmenting the HDD(s)), in my experience a fresh install is usually the best way to achieve 'like new' performance again - especially if lots of software has been installed/uninstalled on the PC since the OS was installed or its been a long time since a fresh install. I think Win XP is an ideal match for such a PC so I have no problem with the OS choice at all but I really think that considering the cost of a (only slightly) faster upgrade CPU, you'd be better off saving your money and performing a fresh install to regain lost performance. Once you have enough money saved up for a complete new PC then you'll really notice the difference and you'll get more bang for your buck.
If you're not sure how to procede with backing up your data and performing a fresh install, post back any questions and I'll try to help.
Thanks so much for that "dose of common sense" I have an external hard disk for data backup, so its mainly a case of the huge amount of time it seems to take to get everything organized, then the time to get programs installed and working again.
A new computer is definitely the way to go eventually, and requires only a little more work than a reformat. The money I would have spent on a processor will go towards that instead. My computer is 3 1/2 years old, which is "ancient" in terms of the improvements in speed in everything.
Your 3.5 year old PC is still perfect spec for running Win XP though! I think it just needs the treatment you least want to do () to get it back in peak perfomance again. As you have an external HDD, you may wish to purchase some imaging software and once you have your PC set up again as you want it (but before installing any Antivirus or Utility software - such things are often regularly updated) consider capturing an image of the HDD. Then it's just a quick and simple matter of restoring the PC back to that image the next time you want to do this.