Tom's Hardware > Forum > Motherboards & Memory > General Motherboard > [Solved] What is the performance loss on putting an AM3 CPU on a AM2+ Mobo?

[Solved] What is the performance loss on putting an AM3 CPU on a AM2+ Mobo?

Forum Motherboards & Memory : General Motherboard - [Solved] What is the performance loss on putting an AM3 CPU on a AM2+ Mobo?

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Best answer from mongox.

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leman russ   10-11-2009 at 07:35:51 PM

Title says it all really. Just how severe is the difference between using an AM2+ Socket Mobo instead of an AM3 Socket only Mobo?

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Best answer from mongox
None for the processor.

AM3 boards will normally use DDR3 RAM, AM2+ use DDR2. So you can put faster RAM on a AM3 board - would recommend 1333 regardless of options.

That's how I understand it.

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Silver Motherboards badge mongox   10-11-2009 at 10:44:57 PM
Best answer

None for the processor.

AM3 boards will normally use DDR3 RAM, AM2+ use DDR2. So you can put faster RAM on a AM3 board - would recommend 1333 regardless of options.

That's how I understand it.

------------------------------ Gigabyte MA785GM-US2H, AMD Phenom II x2 550 BE (4 cores@3.6GHz), G.Skill 2x2GB DDR2 1066 (820@CL4), Scythe Katana3, Hec 585W, Samsung 2232BW+, WD Caviar Black 1TB SATA, Sea 500GB USB, 12 IDE HDs w/Masscool IDE-SATA Convertors, Ugly Old Case, Win XP 32bit
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leman russ   10-12-2009 at 06:51:29 PM

Ah, excellent. I was planning on using DDR2 anyway, as it is far cheaper and the performance difference is not worth the extra cost :D

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xsever   10-12-2009 at 07:18:06 PM

I am running an AM3 CPU on an AM2+ with PC6400 DDR 2 RAM.

Phenomenal performance. Go for it!

------------------------------ http://img261.imageshack.us/img261/8605/sigzlu.jpg

AMD Phenom II X4 720 @ 3.0 | Gigabyte MA790GP-UD4H | G.Skill 4GB Pi Black PC6400 | Sapphire HD4850 | WD Caviar Black 1 TB
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JWZZR   10-12-2009 at 10:48:58 PM

so wait can you use ddr 2 memory with amd3 cpu on a amd2+board?

Reply to JWZZR
Silver Motherboards badge mongox   10-13-2009 at 02:36:32 AM

Yes...

AMD2+ = DDR2

AMD3 = DDR3

Same CPUs for both.

As far as I can see, an AM2+/AM3 is the same as an AM2+ motherboard. That is, all AM2+'s can use AM3 CPUs. The only difference is what type of RAM. And some chipsets allow different max RAM speeds.

------------------------------ Gigabyte MA785GM-US2H, AMD Phenom II x2 550 BE (4 cores@3.6GHz), G.Skill 2x2GB DDR2 1066 (820@CL4), Scythe Katana3, Hec 585W, Samsung 2232BW+, WD Caviar Black 1TB SATA, Sea 500GB USB, 12 IDE HDs w/Masscool IDE-SATA Convertors, Ugly Old Case, Win XP 32bit
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