/ Sign-up
Your question

AM2+ or AM3

  • CPUs
  • Compatibility
  • Motherboards
Last response: in CPUs
February 3, 2011 6:44:36 PM

Is an AM2+ the same fitting and is it compatible and can it be fitted to an AM3 motherboard?

More about : am2 am3

a c 160 à CPUs
a c 436 V Motherboard
February 3, 2011 7:45:41 PM

It's the same; am2+ only works with ddr2; am3 works with ddr2 or ddr3, depending on the motherboard chipset and ram slots.
February 3, 2011 8:12:22 PM

AM3 CPUs will work in AM2/+ motherboards but AM2+ CPUs will not work in AM3 boards.

What the guy above said:

This is because AM3 CPUs have built in DDR2 and DDR3 memory controllers while the AM2+ chips only have the DDR2 controller.

AM3 motherboards are the same as AM2+ motherboards except they use DDR3 instead of DDR2 and have a hypertransport of 1.8 ghz (3.6 effective transfers) instead of 2.6 ghz (5.2 effective).
Related resources
a c 83 à CPUs
a b V Motherboard
February 4, 2011 5:14:56 AM

AM3 removed a pin, so AM2/AM2+ processors cannot fit into an AM3 motherboard, reason is because they lack the DDR3 memory controller required for an AM3 board.

AM3 processors contain both a DDR2 and DDR3 memory controller, and will fit in the older AM2/AM2+ motherboards.
February 4, 2011 3:46:03 PM

There are of course am3 motherboards and cpus.

am3 mobo fits am3 cpu only.
am2+ mobos fit am3,am2+,am2 cpus
am2 motherboards generally work with am3,am2+,am2 as well. Some cpu features will be disabled - like slower HT and also some power saving modes lost.

Also last I checked am3 socket was 941 pins with am3 cpu having 938.

a c 133 à CPUs
a b V Motherboard
February 4, 2011 4:00:24 PM

AM3 Sockets are 941 pins and yes an AM3 CPU is 938. Toms did an article about removing two pins from an AM2+ CPU and tried it in an AM3 socket it did not work but it still worked in the Am2+ board with the pins removed. The compatibility between the two goes much deeper then pin layout. Its more to do with the memory controller.
February 4, 2011 6:30:23 PM

Holdon so wrong!

AM3 CPU will work in AM2 and AM2+ motherboards.

AM2 and AM2+ CPUs will not work in AM3 motherboards.

End of discussion.
a c 174 à CPUs
a c 312 V Motherboard
February 4, 2011 7:28:16 PM

Long thread for a simple answer: