Skyword Sword

[Runo]

(04-10-2012, 06:14 AM)NaturalViolence Wrote:

Quote:No, that's only when using only one core. With two I'm pretty sure it *almost* keeps up with phenom.

Plus, his clock is pretty good.

That doesn't make any sense. Both bulldozer and phenom II have more than two cores. 1 core on bulldozer vs. 1 core on phenom II should produce the same performance difference as 2 cores on bulldozer vs. 2 cores on phenom II. The performance per core is still the same. Unless I'm misunderstanding your implications?

When using 1-4 threads the per core and total performance of bulldozer is inbetween an athlon II and phenom II since each thread has its own module.
When using 5-8 threads the per core performance is inbetween an athlon X2 and athlon II since each pair of threads is sharing a module.

However once you factor in the fact that it has a higher clock rate than any of those cpus the performance per clock per thread can be as low as an athlon X2 when using 8 threads. It still is faster than an 8 core K8 (athlon X2) chip clocked at 4.0 GHz would be due to better sse performance and the ability for a single thread to access the resources of two cores in a module, it just doesn't scale particularly well in either direction.

I meant that on applications that can use only one core, BD would have less performance than phenom 2, while on applications that use two+ cores it could keep up with phenom.
I'm still not sure if that is right, but that was what I meant