Quote:
|
Originally Posted by jman1310
"The one limitation that both AMD and Intel have is bandwidth. In order to maintain compatibility with present day Socket-940 and Socket-939 motherboards, AMD could not increase the pincount of their dual core processors. The benefit is that AMD's dual core CPUs will work in almost all Socket-940 and Socket-939 motherboards (more on this later), but the downside is that the memory bus remains unchanged at 128-bits wide and supports a maximum memory speed of DDR400. So, while single core Athlon 64 and Opteron CPUs get a full 6.4GB/s of memory bandwidth, today's dual core CPUs are given the same memory bandwidth to share among two cores instead of one. " quoted from anandtech
seems like i was right, what's incorrect? |
What part of the difference between "split evenly" and "shared between" don't you understand? You will be hard pressed to find any cases where there is signifiicant difference in performance between the dual core processors and the prior single core processors at the same frequency for single threaded workloads.
On top of that, there are few workloads outside of HPTC that are bandwidth limited.
Aaron Spink
speaking for myself inc.