2 MB Cache Athlon 64

daniel_harker · Post by **daniel_harker** » February 11th, 2005, 12:04 am

Has anyone heard of an Athlon 64 with a 2 MB L2 Cache? a friend of mine found it once but we can't remember which one it was. Any ideas?

Aggressor Prime · Post by **Aggressor Prime** » February 11th, 2005, 1:05 am

There is no such thing yet. The greatest amount of cache (L2) on a K8 (Athlon 64/Sempron 3100/Mobile Sempron/Opteron) is 1MB which can be found on all Opterons and Athlon 64 FXs and some Athlon 64s. With all of the cache considered (L1+L2), you can have, at most at this moment, 1152KB. (128KB of L1 cache + 1024KB of L2 cache) For more information about the details of the K8s, go to the following locations: Semprons (Note: Only the 3100 is on Socket 754. The rest are on Socket A.) Mobile Semprons Athlon 64s (Note: Not included is the Athlon 64 2800 @ 1.8GHz with 512KB of L2 cache on Socket 754.) Athlon 64 FXs (Note: Not included are the Athlon 64 FX-51 @ 2.2GHz and 53 @ 2.4GHz on Socket 940.) Low-Power Mobile Athlon 64s Mobile Athlon 64s DTR Athlon 64s (Note: DTR = DeskTop Replacement. DTR CPUs are used in high-powered notebooks.) Opterons However, there are the K9s coming out soon. They feature dual K8 cores. Thus, they can have upto 2MB of L2 cache.

daniel_harker · Post by **daniel_harker** » February 11th, 2005, 9:42 am

Why, on this page (http://www.amd.com/us-en/Processors/Pro ... 94,00.html) is there no mention of HyperThreading?

Aggressor Prime · Post by **Aggressor Prime** » February 11th, 2005, 5:49 pm

Hyper Threading is an Intel invention. Normally, a competing company wants to make their products look better. But don't get me wrong, the Athlon 64 FX is much better than the Pentium 4 EE. Hyper Threading technology has no real advantages. All it does is splits your resources. (It cuts your GHz, cache, FSB, and memory bandwidth in half for two theoretical cores.) It is better to have a 4GHz CPU than 2 2GHz CPUs because some applications can only utilize one thread. They can either work one of the two 2GHz CPUs or utilize the full power of the 4GHz CPU. Even-numbered (2,4,6,8,etc.) multi-threaded applications show no difference in a Hyper Threaded environment. Hyper Threading was just a thing Intel used to trick people. If you don't get what I said above, think of it this way. Non-HT CPUs are 60mph single-laned highways. HT CPUs are 30mph dual-laned highways. Each highway can only accept one car per lane at a given time. The cars remain at the quoted speed while travelling the highway. 1 car can either move at 60mph or 30mph. 2 cars can either: - 1 goes first on the 60mph highway and then the other one goes. - 2 go at the same time on the 30mph highway. And so on and so on.