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will AM2+ processor work with AM3 motherboard?

post #1 of 5
Thread Starter 
long story short, lightning killed my spare phenom x3 rig.
HDD and PSU still work, but I have no way of testing the AM2+ Phenom X3 cpu.

I do have this AM3 board http://www.biostar.com.tw/app/en/mb/introduction.php?S_ID=517
It doesnt list the Phenom I series on cpu support, but if I remember correctly, AM3 boards were supposed to be backward compatible to AM2+ cpus.
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Rabasu i7-3770K
(13 items)
 
Rabasu FX6100
(13 items)
 
 
CPUMotherboardGraphicsRAM
i7 3770K ECS H77H2-M3 Sapphire R7 360 2GB GDDR5 2x8GB Kingston HyperX Blu 
Hard DriveHard DriveOptical DriveCooling
Seagate 1TB Seagate 1TB Sony DVDRW stock 
OSMonitorPowerCase
Windows 7 x64 BenQ E2220 1080p Corsair 650 watts Coolermaster Elite 430 
Mouse
A4tech X7 710BH 
CPUMotherboardGraphicsRAM
AMD FX 6100 4.0 Ghz 6-core Asus M5A78L-MLX3 AM3+ Powercolor HD7730 1GB DDR5 16GB (2x8GB) Corsair Vengeance LP 1600 
Hard DriveHard DriveOptical DriveCooling
Seagate 1TB Seagate 1TB Sony DVDRW CoolerMaster Hyper212+ with 2x140mm Deepcool UF140 
OSMonitorPowerCase
Windows 7 x64 / Mint x64 BenQ E2220 1080p Aerocool Strike-X 500watts CoolerMaster Elite 430 
Mouse
A4tech X7 710BH 
CPUGraphicsRAMHard Drive
A8 7410 2.5Ghz Radeon R5 M335 2GB 4GB DDR3L 1 TB HDD 
OSCase
Windows 8.1 Dell Inspiron 5455 
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post #2 of 5
I don't believe their memory controller can address DDR3, so no.

AM3 CPUs like Phenom II can work in AM2+ since they also include extensions on the controller to address DDR2.
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Waiting on X399
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250 GB 840 EVO Noctua NH-D14 Windows 10 Logitech K350 
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post #3 of 5
Quote:
Originally Posted by beers View Post

I don't believe their memory controller can address DDR3, so no.

AM3 CPUs like Phenom II can work in AM2+ since they also include extensions on the controller to address DDR2.

This is correct.... AM3 CPU's have both a DDR2 and DDR3 memory controller, and can be used on both types of boards. But AM2+ CPU's have only a DDR2 controller, and can't be used on a DDR3 board.
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1 l^st t!me
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post #4 of 5
Yeah its not the socket but the RAM. And since AM3 boards use DDR3 memory and AM2/2+ processors have DDR2 memory controllers, no you can't use it and will have to buy a new chip.

On the bright side, Phenom II X4 965's can be had for well under $100 right now so you wouldn't have to spend a ton extra if you can't find a AM2+ motherboard.
post #5 of 5
Thread Starter 
so i have no way of testing if the cpu still works.
I could find a used board for maybe $20 but im not sure if its worth keeping the phenom x3 as backup.

Im using a spare Llano APU to type this.
It seems my FX6100 rig was also damaged by the lightning, everything works fine except the lan port
Rabasu i7-3770K
(13 items)
 
Rabasu FX6100
(13 items)
 
 
CPUMotherboardGraphicsRAM
i7 3770K ECS H77H2-M3 Sapphire R7 360 2GB GDDR5 2x8GB Kingston HyperX Blu 
Hard DriveHard DriveOptical DriveCooling
Seagate 1TB Seagate 1TB Sony DVDRW stock 
OSMonitorPowerCase
Windows 7 x64 BenQ E2220 1080p Corsair 650 watts Coolermaster Elite 430 
Mouse
A4tech X7 710BH 
CPUMotherboardGraphicsRAM
AMD FX 6100 4.0 Ghz 6-core Asus M5A78L-MLX3 AM3+ Powercolor HD7730 1GB DDR5 16GB (2x8GB) Corsair Vengeance LP 1600 
Hard DriveHard DriveOptical DriveCooling
Seagate 1TB Seagate 1TB Sony DVDRW CoolerMaster Hyper212+ with 2x140mm Deepcool UF140 
OSMonitorPowerCase
Windows 7 x64 / Mint x64 BenQ E2220 1080p Aerocool Strike-X 500watts CoolerMaster Elite 430 
Mouse
A4tech X7 710BH 
CPUGraphicsRAMHard Drive
A8 7410 2.5Ghz Radeon R5 M335 2GB 4GB DDR3L 1 TB HDD 
OSCase
Windows 8.1 Dell Inspiron 5455 
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Rabasu i7-3770K
(13 items)
 
Rabasu FX6100
(13 items)
 
 
CPUMotherboardGraphicsRAM
i7 3770K ECS H77H2-M3 Sapphire R7 360 2GB GDDR5 2x8GB Kingston HyperX Blu 
Hard DriveHard DriveOptical DriveCooling
Seagate 1TB Seagate 1TB Sony DVDRW stock 
OSMonitorPowerCase
Windows 7 x64 BenQ E2220 1080p Corsair 650 watts Coolermaster Elite 430 
Mouse
A4tech X7 710BH 
CPUMotherboardGraphicsRAM
AMD FX 6100 4.0 Ghz 6-core Asus M5A78L-MLX3 AM3+ Powercolor HD7730 1GB DDR5 16GB (2x8GB) Corsair Vengeance LP 1600 
Hard DriveHard DriveOptical DriveCooling
Seagate 1TB Seagate 1TB Sony DVDRW CoolerMaster Hyper212+ with 2x140mm Deepcool UF140 
OSMonitorPowerCase
Windows 7 x64 / Mint x64 BenQ E2220 1080p Aerocool Strike-X 500watts CoolerMaster Elite 430 
Mouse
A4tech X7 710BH 
CPUGraphicsRAMHard Drive
A8 7410 2.5Ghz Radeon R5 M335 2GB 4GB DDR3L 1 TB HDD 
OSCase
Windows 8.1 Dell Inspiron 5455 
  hide details  
Reply
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