AMD Phenom II x4 975 Black Edition 3.6GHz CPU-Processor

SiSoft Sandra:

SiSoft is one of our favorite synthetic benchmark suites. It has a benchmark to test nearly every aspect of a computer. Today we take a look at the CPU related benchmarks.

At the stock speeds, the 975 scores and aggregate score  of 45.4 GOPS. This is about in line with what we would expect. With the chip overclocked, it scores 50.25 GOPS.

The cryptography benchmark runs the chip through some standard cryptographic algorithms and then measures the throughput. The 975 scored a cryptographic bandwidth of 693 MB/s, putting it ahead of the i7 920. With the overclock the chips has a throughput of 765 MB/s.

This benchmark is supposed to demonstrate how effectively the cores in the processor communicate with each other. The inter-core bandwidth at stock speed it 2.8 GB/s. When overclocked the bandwidth is decreased to 2.6 GB/s, but the inter-core latency is also decreased by about 10 ns, which helps make up for the loss of bandwidth.

At stock speeds the aggregate multi-media performance is 79.4 MPix/s, while when overclocked this jumps to 88.18 MPix/s.

	Processor Power Management Efficiency – Stock 3.6GHz	Processor Power Management Efficiency – Overclock 4GHz

In this benchmark we can see that the chip does use up a decent amount of power, being that it is a 125watt chip.

CINEBENCH 11.5:

CINEBENCH is a benchmark that measures a CPU’s performance when rendering a 3D scene. It is scalable up to 32 processors, and makes for a decent real world benchmark for determining a CPU’s potential in the 3D graphics market.

We see that at the stock speeds, the 975 can’t quite compete with the i7 960 and 860. This is due to the i7’s having 8 logical cores, while the 975 only has 4. The single core performance still isn’t quite up to speed with the i7’s either. When we overclock the chip, we still aren’t quite able to catch up with the i7’s in the multi-threaded test, as CINEBENCH really favors chips that have a high number of cores. In the single core performance it is a different story though. When overclocked, the 975 is able to use it’s brute force and beat the i7’s by a pretty decent margin.

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