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The CPU-Z version 1.30 utility doesn’t give us full info about the processor, obviously because there are no official data about Socket 939 Semprons from their manufacturer:

However, CPU-Z correctly detects a 128KB L2 cache as well as SSE3 and AMD64 instructions. The Socket 939 Sempron 3000+ also supports AMD’s Cool’n’Quiet technology, dropping its frequency to 1GHz and voltage to 1.1V in the power-saving mode.

The following table compares the characteristics of two existing Sempron 3000+ (for Socket 754 and for Socket 939) and shows how they differ from the Athlon 64 3000+ model:

Sempron 3000+

Sempron 3000+

Athlon 64 3000+

Processor socket

Socket 754

Socket 939

Socket 939

HyperTransport bus

800 MHz

1 GHz

1 GHz

Clock frequency

1.8 GHz

1.8 GHz

1.8 GHz

L2 cache size

128 KB

128 KB

512 KB

Memory controller

Single-channel

Dual-channel

Dual-channel

Typical heat
dissipation

62 W

62 W

67 W

Price
(on 10
/10 /05 )

$91

$91

$149

The two Sempron 3000+ CPUs differ a lot. The Socket 939 model has the same frequency and the same amount of cache memory as its Socket 754 analog, but features a faster HyperTransport bus and a dual-channel instead of a single-channel memory controller. These factors should obviously make the Socket 939 Sempron 3000+ the faster of the two. As for the price factor, both Sempron 3000+ versions have the same official price and do not differ much in their retail prices, and so the Socket 939 version seems a much more appealing buy. In fact, the Socket 939 Sempron 3000+ is inferior to the full-fledged Athlon 64 3000+ in one thing only – its L2 cache is reduced to 128 kilobytes.

The Socket 939 Sempron having been a very rare product in the retail market until recently, you may wonder about its compatibility with existing mainboards. Well, you shouldn’t worry about that. AMD has been supplying such processors since the beginning of this year, even though without much fuss, so all the leading mainboard makers have long introduced the necessary changes into the BIOS code of their products. We installed our sample of the processor into several popular mainboard models and they all worked normally and correctly identified the CPU as Sempron 3000+ for Socket 939.

 
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