The ALU and MFLOPS benchmarks don’t return surprising results. The quad-core is almost twice as fast due to threading optimizations, despite its lower clock speed—as expected.
The encryption score is entirely different. This overall result says that the Clarkdale-based Core i5 with AES acceleration is nearly three times faster than a Core i7-870 quad-core.
This is why the encryption score looks so great. Plain AES-256 encryption is more than six times faster on the hardware-accelerated dual-core processor.
The SHA-256 encryption test proves that the feature only accelerates AES.
Of course, the Lynnfield design sports an on-die memory controller, while Clarkdale's memory controller is on-package, on the 45nm graphics core. As a result, its memory bandwidth is markedly lower.
- Is Intel’s AES-NI Support A Must-Have Feature?
- What Is AES Anyway?
- Clarkdale-Based Core i5 With AES Support
- Test Setup And Benchmarks
- Benchmark Results: SiSoftware Sandra 2009 SP3
- Benchmark Results: PCMark Vantage Communications Test
- Benchmark Results: Bitlocker, Everest, And WinZip 14
- Benchmark Results: 7-Zip