Hi, i would need your help. I wanna upgrade my cpu from pentium D 915 to a core 2 quad q6700 i have a gateway e-4610s whit DQ965MT chipset with the newest bios So, could i upgrade my cpu to core 2 quad or couldn't I? Thanks for any answers.
It's been a long time since I've worked on one of those, but I think only the original 'Conroe' and 'Allendale' dual-core 65nm 1066MHz/800MHz FSB CPUs will work on that board. So the fastest your gonna go is a Core 2 Duo E6700 most likely.
None of the x963/5 chipset variants officially supported CPUs with a FSB over 1066 MHz. The Q965 also lacks supports for quads, meaning the fastest CPU it will support is the E6700. But this is also reliant on BIOS support as well. If the BIOS in your machine doesn't have microcode entries for the E6700, it either won't work at all, or have bugs.
Care must also be taken to not get a Pentium Dual-Core E6700, instead of a Core 2 Duo E6700. The former is a later part based on a cut down Wolfdale-2M core and requires a later x3x or x4x chipset. The latter is the original Conroe part. I made this mistake years ago with a Pentium DC E6300 on a Q965 Intel Desktop Board. While it booted, Speed Step and ACPI were broken, so the CPU ran full tilt 24/7 and was hot.
It's easy to tell the difference between the parts though, based on clock and cache.