- Intel® Pentium Processor Extreme Edition
- Intel® Pentium processor Extreme Edition
|Processor Number: 840, 955, 965|
|Architecture: 90 nm and 65 nm technology|
|L2 Cache: 2x1MB and 2x2MB|
|L3 Cache: NA|
|Clock Speed: 3.20, 3.46 GHz and 3.73 GHz|
|Front Side Bus: 800 MHz and 1066 MHz|
- Intel® 975X Express chipset
- Intel® 955X Express Chipset
In reality, the only changes made with the leap to the Cedar Mill and Presler cores in the way of a die shrink, care of a new 65Nm manufacturing process. By shrinking the die size, Intel facilitated the utilization of lower voltages for the processors to continue operating at their specified frequencies, and this, in turn now results in processors which can do the same tasks as the past - while running just a bit cooler. Cool enough (Although still hot), it seems that I was able to use the stock cooler this time around, rather than something jury rigged up just so the testing could be done. The second step in the creation of the Presler cores is the creation of two cores manufactured on one die, as opposed to two cores simply tied together, as was the way with the Prescott architecture. Due to this new method of manufacturing chips, Intel now faces a real possibility of higher yields, despite the fact that the on die cache has doubled from 1MB to 2MB.This increase which has pushed the total transistor count from 230Million up to an astronomical 376 Million.
The increase in yields comes from the fact that since cores are manufactured together, so, if one of the two cores on the new die proves unsuitable for use, it can be disabled, and the chip can be put out as a single core Cedar Mill chip. The third addition to each Cedar Mill/Presler package is that of Intel's Vanderpool technology. The purpose and focus behind this technology is that a virtual operating system can be run on top of the current one, allowing users to experiment in software such as Virtual Machine 5.5 with little performance loss. While this doesn't seem to hold any practical value for the desktop users, I'm sure it has a niche somewhere in the market. In the end however, with Conroe's shadow looming around the corner; I'm not sure where the market for Netburst's last attempt will stand in any case.
Intel's first series of dual-core CPUs were a bit of a disaster as far as seeing much in improved performance due to dual-core technology. In the first design they utilized a welded bridge for the interconnectivity of the two cores, which resulted in much lower performance gains than expected and poor sales at the sales counter. Okay, so now Intel made its mistake, took the blows, and now comes back to the table with the new 955 that is a redesigned CPU altogether and offers substantial gains over its predecessors. Back is the 1066Mhz system bus that was missing in the first series of dual-core CPUs from Intel and that is one of the things that is supposedly going to breath some performance back into the system. The CPU still runs hot though and that is something that Intel claims will be resolved in their next release, the under wraps Conroe, but for now the 955 is still one hot CPU. At the moment I feel an enthusiasts based Intel CPU is best cooled with a liquid or Peltier based solution to avoid lets say, any uh overheating encounters. The stock one works, but not well enough to trust running inside any closed case for log periods of time. We use an open-air test bench and the retail cooling solution was barely sufficient and still hovered in the high-temp zone.