Originally posted by: Regs
AMD stated that their Barcelona will offer 150% increase in performance over K8. Though when you consider it's 4 cores you can easily split that percentage up in real world performance to be 37-38% which would make it a little over par with the Core 2. They also talk about increased parallelism. What that will translates into real world performance is yet to be seen.
"The most obvious change we will see will be the addition of a shared L3 cache. This new L3 cache, debuting at 2MB in Athlons and Opterons, will be used by all four cores. Each core will also have their own smaller L1 (64KB) and L2 (512KB) caches that can be shared by all the cores as well. This moves towards latency reduction in an attempt to lay the hardware groundwork for truly
parallel software programming that can use all the cores simultaneously.
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http://enthusiast.hardocp.com/article.html?art=MTE3NCwxLCxoZW50aHVzaWFzdA==
AMD is improving their Interconnect for more than just performance. Even with a cross-trade tech agreement with Intel, their competition will have a lot of catch-up to do before they can even reach AMDs advancements.
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When talking to both Phil and Pat, we got some interesting answers about advancements in Instructions Per Clock with the Barcelona Pat Conway said that we will see a ?performance improvement of 150% over the next two years that will be within the same power envelope.?
If you take into account that you can back off frequency and add more cores, some of this can be achieved now if you are counting IPC across all cores. (See below how simply pulling back on frequency by as little as 16% can have a huge impact on power draw.) Intel is bound by the same principles as well.
On IPC and AMD?s Barcelona Phil Hester had this to say: ?We want to stay focused on upgrade compatibility. We must realize more IPC per watt, and our next-generation architecture will show a 50% improvement of IPC per watt.? So I came away with a somewhat clouded view on IPC, but I did get the distinct impression that AMD?s next-generation architecture would be on par or better than what we have seen with Intel?s Core 2 Duo, which is the low benchmark AMD must shoot for.
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