There is none. The Pentium D is based upon an older architecture and is slower, at any speed, than any Core 2 Duo processor.
Yes
The CPU can be upgraded only if your motherboard/chipset and BIOS support it. Socket 478 motherboards cannot support a Dual-Core, as they use a different socket. If you have an LGA775 motherboard, it may work, but chipsets before 945 are not officially supported and may fail to function properly.
Yes,it works with Intel 945
No. Older chipsets, such as the Intel 945 and older do not have the necessary support for a Core 2 Duo processor, even though they are often found on boards with an LGA775 socket. They also do not have the proper Front Side Bus speed, so even if the processor ran, it wouldn't reach its proper speed.
If it shares the same slot-type and the motherboard supports it, yes. In some cases, a motherboard will support a processor with a higher number of cores than was originally intended thanks to BIOS updates. For instance, Asus M2N motherboards were originally released around the time that dual-core Athlons (Athlon X2) were gaining popularity. They supported single and multi-core processors of the AM2/AM2+ (slot) type by design. With the latest BIOS updates, they officially support AMD Phenom II X4 processors of the AM3 type up to the Phenom X4 945, and many users have had success installing 955s in these boards too. If you are considering installing a dual-core processor in place of the existing single-core processor, it would be best to check the compatibility of your board with such processors before going further.
39% of 945 = 39% * 945 = 0.39 * 945 = 368.55
The list of supported processors by 945 chipset is rather long. Please refer to related links to find out full list.
== == The Intel® 915G Express chipset, designed for the Intel® Pentium® 4 processor supporting Hyper-Threading Technology† in the LGA775 package, delivers a decade's worth of innovation:PCI Express* buses can deliver over 3.5 times more bandwidth for I/O and graphics cards than PCI and AGP 8X respectively1.Graphics flexibility, with support for the built-in Intel® Graphics Media Accelerator (GMA) 900 and for PCI Express graphics cardsFlexible memory support for dual channel DDR2 533 memory and dua-channel DDR memoryThe Intel® 865G chipset, designed for the Intel® Pentium® D processor (compatible with the lead free version of Intel® 865G Chipsets supporting socket LGA775) and the Intel® Pentium® 4 processor supporting Hyper-Threading Technology†, is a highly flexible and scalable solution that meets a broad range of demanding computing needs. The 865G chipset offers solid performance through a variety of exciting features, including dual-channel DDR 400 main memory, an 800 MHz system bus, and an integrated graphics controller with Intel® Extreme Graphics 2 technology.
1 and 945
45
945
945-666 = 279