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Details of Intel 45nm Processors Leaked
DCC writes "TechARP has gotten some juicy news from Intel. This time, it's the top secret details of the Intel 45nm desktop processors, both Yorkfield and Wolfdale with benchmarks and pricing included! 'As promised earlier, Intel will launch their 45 nm processors by the end of this year. In fact, we have been told that the launch date had already been set at November 11, 2007, so mark your calendars. [...] Code-named Yorkfield XE, the Intel Core 2 Extreme QX9650 will be a quad-core processor built from two 45 nm Wolfdale processor dies. It will displace the Core 2 Extreme QX6850 (Kentsfield) processor as the top desktop processor model until Q3, 2008'"
Every single review I saw of the 4x4 had it losing to Intel quad cores using the "crippled" FSB. Hypertransport is great for 4 socket+ systems which is why Intel is going to a point-to-point interconnect next year. However, on smaller systems like desktops and up to 2 socket servers, Hypertransport's benefits are much less clear. For example, when Anandtech did the initial K10 benchmarks it turns out that it took the K10 about 76ns to transfer data between any 2 cores on the chip using its layer 3 shared cache (which is faster than the Hypertransport used in the 4x4).
However the more interesting number was that it took Intel's FSB 77ns to transfer data between the dual-dies, and if the data were only going between cores on the same die that time was only 26ns. So the upshot was, that the worst case scenario for Intel's data latency was less than 2%, while the better case scenario (which is not too hard to achieve) gave Intel a 50% reduction in data latency. If you want to talk about 4 socket+ systems then Hypertransport is a winner, but on a desktop I wouldn't obsess over it too much.
AntiFA: An abbreviation for Anti First Amendment.
For the AMD Athlon 64 X2 processors, the number does actually mean something.
For a 1MB cache (per core) cpu, it's exactly 2x the clock speed in megahertz. The X2 4000+ is 2000MHz. This continues every 200MHz all the way up to the top cpu, the 6400+ (3200MHz, 1MB cache).
For a 512kB cache (per core) cpu, it's 200 lower than that. The X2 3800+ is 2000MHz as well, but 512kB cache. This continues every 100MHz all the way up the line to the 5400+ (2800MHz, 512kB cache).
For a 256kB cache (per core) cpu, it's 200 lower again. The X2 3600+ is ALSO 2000MHz, but has 256kB cache. There is only one 256kB cache X2 cpu. There is also a X2 3600+ that is 1900MHz and 512kB cache, which still fits the pattern.
The single core Athlon 64s seem to have a similar numbering scheme, but with more factors affecting it, including hypertransport speed (800MHz/1000MHz), and socket (754/939). Some of the cpus were numbered slightly differently, but this is 99% accurate:
The base is a 512kB cache socket 754 hypertransport 800MHz 2000MHz cpu, which is rated at 3000.
Socket 754 cpus were rated 200 higher for every 200MHz higher cpu speed.
1MB cache versions were mostly 200 higher (one was 300), and 256kB cache versions were 100 lower.
Socket 939 cpus were rated 200 higher than socket 754. (Due to the support for dual-channel ddr, they were better).
1000MHz HT cpus were rated an additional 100 higher for every 200MHz higher cpu speed than the base (2000MHz). The cpus that were 200MHz slower than the base didn't get an additional 100 points deducted though.
Again, 1MB cache versions were 200 higher.
This doesn't cover the 1500+, which was only used in a HP Blade PC.
The AM2 cpus were mostly the same as the 1000MHz HT S939s, except for the 4000+, which was a 2600MHz/512kB cache instead of 2400MHz/1MB, and the details above would have scored it at 4100+.
As you can see, the numbers are mostly arbitrary, and mostly derived from the features of the cpus instead of a comparison against intel.