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AMD FX-8150 Bulldozer Processor E-mail
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Written by David Ramsey   
Wednesday, 12 October 2011
Table of Contents: Page Index
AMD FX-8150 Bulldozer Processor
Features and Specifications
Bulldozer CPU Architecture
Processor Testing Methodology
AIDA64 Extreme Edition Tests
PCMark Vantage Tests
CINEBENCH R11.5 Benchmarks
CPU-Dependent 3D Gaming
PassMark PerformanceTest
Media Encoding Benchmarks
SPECviewperf 11 Tests
SPECapc Lightwave
Blender and POV-Ray
Bulldozer Core Performance
AMD FX New Instructions
AMD FX-8150 Overclocking
Bulldozer Final Thoughts
AMD FX-8150 Conclusion

Bulldozer Core Performance

Bulldozer's core architecture represents a completely new design for AMD, and since it's the building block for the next generation of AMD desktop and server CPUs, I decided to compare the single core performance of the FX-8150 against the Phenom II X6-1100T and the Intel Core i5 2500K. For these tests I set the processors to run at their stock clocks and left turbo features enabled. I left the memory speed set to the highest officially supported by each system. Remember that both Intel and AMD will use higher turbo frequencies when only a single core is in use.

Base Single Core Max L1 Cache L2 Cache L3 Cache DDR3 Freq
FX-8150 3.6GHz 4.2GHz 128K 2M (shared per module) 2M (shared per module) 1866MHz
Phenom II 1100T 3.3GHz 3.7GHz 128K 512K 6M (shared) 1333Mhz
Core i5 2500K 3.3GHz 3.7GHz 64K 256K 6M (shared) 1333Mhz

Comparisons between differing core architectures are inherently imprecise. Recall that Bulldozer modules each comprise two integer cores and one shared floating point core, and that if only a single integer core (APU) is in use, it can use all of the normally shared cache resources. For these tests I used benchmarks that had "number of threads" settings and set the number of threads to "1". First up is the CINEBENCH single core rendering test.


Intel dominates here. While the FX-8150 could leverage its eight core to roughly match the 2500K in multi-core rendering, it's no contest at the single core level.


And Intel's domination continues in single-core renderings using Blender and POV-Ray. Let's look at Passmark:


AMD leads in three of these four tests, including, oddly, the integer test. Intel traditionally beats AMD in integer performance, so I can't explain this result, especially given the very large 70% delta.


But the FX-8150 falls behind again in three of the last four Passmark tests.

Note that in most of these tests, the spiffy new Bulldozer cores in the FX-8150 provide about the same performance as the Thuban cores in the Phenom II X6-1100T. This is disappointing especially given the base and turbo frequency advantage enjoyed by the new processor. But AMD has one more trick up their sleeve: new x86 instructions that applications can use to increase performance.


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