Article: IntelŪ PentiumŪ D 805 and IntelŪ PentiumŪ D 820 Duel (Mainstream Dual Core Brethren)
Many thanks to IntelŪ for providing the processor.
I. Introduction
Ever since the IntelŪ PentiumŪ D 805 Processor is released on the mainstream market, the computing world has been swarmed with mix emotion, denial, scrutiniy, mockery, excitement, and acceptance. And this isn't surprising, IntelŪ made a significant leap to bring Dual Core computing to even the most budget conscious consumer, paving the way for an upgrade, replacement, and even an extra PC. And during this transition period from single core to dual core computing, there are many unknowns, ranging from questions such as whether the upgrade is worth it, performance increase against single core processors with higher rating or GHz speed, and even gaming. This short article will try to unravel the answers to some, if not all, of the questions.
During this period of transition, many have totally missed the other contender for mainstream dual core computing, the IntelŪ PentiumŪ D 820. This is the next stepping stone after the youngest and newest dual core processor, offering a much better specifications. The IntelŪ PentiumŪ D 820's primary difference with its younger IntelŪ PentiumŪ D 805 brother is two-fold: Clock frequency and FSB frequency. The IntelŪ PentiumŪ D 820 runs on a full 800MHz FSB with 2.8GHz clock speed, while the IntelŪ PentiumŪ D 805 runs in 533MHz FSB with 2.66GHz clock speed. Both have independent 2x1MB L2 cache, with EM64T, XD, and SSE3 features and based on the Smithfield core.
II. Specification
The IntelŪ PentiumŪ D 800 series Processor is based on the new "socket" LGA775. It is based on the Smithfield core, with 2x1024KB of L2 cache. This succeed where Hyperthreading left off. It is equipped with EM64T,XD (Execute Disable) feature as well as Streaming SIMD Extensions 2 and 3. Like other non Extreme series, it doesn't have Hyperthreading.
| IntelŪ PentiumŪ D 805 | IntelŪ PentiumŪ D 820 |
| Clock: 2.66GHz | Clock: 2.8GHz |
| Core: Smithfield | Core: Smithfield |
| Process: 90nm | Process: 90nm |
| Bus Speed: 533MHz | Bus Speed: 800MHz |
| L2: 2048MB | L2: 2048MB |
| Multiplier: 20 | Multiplier: 14 |
| EM64T: Yes | EM64T: Yes |
| Execute Disable: Yes | Execute Disable: Yes |
| Hyperthreading Technology: No | Hyperthreading Technology: No |
| Virtualization: No | Virtualization: No |
| Core per Package: 2 | Core per Package: 2 |
| L2 Cache per Core: 1024KB | L2 Cache per Core: 1024KB |