Socket 939 motherboads are compatible with DDR2 RAM.
Socket 939 is an outdated socket type that supports several types of AMD processors. Socket 939 processors support a variety of features including 64-bit instruction sets, dual-channel DDR2 RAM modules and dual-core processors. Socket 939 supports processors from five different processor families. Although they're physically very similar, socket 939 compatible processors aren't interchangeable with socket 940 or socket AM2 processors.
Sempron 64
The Sempron 64 processor family includes processors that are compatible with socket 754, 939 and AM2. These processor are budget models that use a single processing core. They operate at speeds up to 2.3 gigahertz and have a Level 3 data cache of 512KB. There are a total of nine processors in this family that support socket 939 versions of the Sempron 64 processors from the 3000, 3200, 3400 and 3500 models. These processors include both 32-bit and 64-bit processors.
Athlon 64 FX
The Athlon 64 FX is a high-end family of processors designed to provide high levels of performance. The socket 939 compatible models of this processor family include both dual- and single-core models. All of the Athlon 64 FX processors include support for 64-bit processing and have speeds ranging between 2,400 and 2,800 MHz. There are a total of four models from this family that support socket 939 motherboards including the FX-53, FX-55, FX-57 and FX-60. Of these processors, the FX-57 has the highest clock speed; however, the FX-60 is the dual-core model, giving it the edge over the FX-57 in most tests.
Opteron
The AMD Opteron family is intended for use in server computers. The Opteron is available in three basic types designed for systems using one, two or up to eight processors. The Opterons available for socket 939 are all designed for uni-processor systems. These processors are available in speeds between 1,800 MHz and 3,000 MHz. Opteron processors that provide socket 939 support include versions of model numbers 144, 146, 148, 150, 152, 154 and 156. The Opteron 156 is the most powerful processor available that supports this socket.
Athlon 64 X2
The Athlon 64 X2 family of processors is the dual-core version of the Athlon 64. The processors from this family that support socket 939 have operating frequencies between 2,000 MHz and 2,400 MHz. The Athlon 64 X2 family has 11 processors that are compatible with socket 939. These processors have Level 2 data caches that are rated at 512KB, 1MB and 2MB. The processors in this family that are compatible with socket 939 include versions from model numbers 3600, 3800, 4200, 4400, 4600 and 4800.
Athlon 64
The Athlon 64 family is the generation of processors before the dual-core Athlon 64 X2 models were released. These processors are single-core models with L2 data caches of one megabyte or less. The Athlon 64 line also includes support for 64-bit processing. This family of processors provides the most extensive support for socket 939 motherboards with a total of 28 processors. These models of the Athlon 64 have CPU frequencies between 1,800 and 2,400 MHz. The models of this processor family that are compatible with socket 939 include versions of the 3000, 3200, 3400, 3500, 3700, 3800 and 4000 models.
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