engineering sample samples qualification cpu processor prozessor information mhz pictures core frequency chip packaging info ic x86 museum collection amd cyrix harris ibm idt iit intel motorola nec sgs sgs-thomson siemens ST signetics mhs ti texas instruments ulsi hp umc weitek zilog 4004 4040 8008 808x 8085 8088 8086 80188 80186 80286 286 80386 386 i386 Am386 386sx 386dx 486 i486 586 486sx 486dx overdrive 80187 80287 387 487 pentium 586 5x86 386dlc 386slc 486dx2 mmx ppro pentium-pro pro athlon duron z80 sparc alpha dec dirk oppelt
Welcome to the CPU collection
Here you can find information about obsolete and rather current processors and co-processors.
I tried hard to gather useful information about all items and topics in this collection. However, there will be incomplete, missing or wrong data in several places. You can participate in enhancing and extending this site by adding your comments and knowledge. Just click on the 'add comment/info' links on places like CPU information pages, class overviews and company profiles to enter your messages.
All CPU pictures on the site were taken by me and show actual items in the collection. They all have the same resolution to make it easier to compare the different processors' sizes (except some slot cartridge processors like the Pentium II, which are reduced by 50% in detail views because they are very large). If loading speed should be low try the 'Configure' link to adjust appearance of images and visual styles.
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991 different chips are online - have fun exploring the collection!

what's new on - October 2008 updates and changes
You can find previous news and site updates in the News Archive.
* 2008-10-22  
13 additions to the collection today:

AMD K6-III Processors

The K6-III was the last and fastest of all Socket 7 processors. It achieved the distinction of being the fastest x86 processor on the market on release, and remained highly competitive for a considerable time afterwards.
In conception, the design was simple: it was a K6-2 with an additional L2 cache. The original K6-2 had a 64 KB primary cache and a much larger amount of motherboard-mounted cache (usually 512 KB or 1 MB but varying depending on the choice of main board). In contrast the competing Intel parts used 32 KB of L1 cache and either 128 KB of full-speed secondary cache integrated into the CPU itself (Celeron) or 512 KB of half-speed cache mounted on a processor daughter board (Pentium II, Pentium III). The K6-III, however, used both methods: it had 64 KB primary cache, a massive 256 KB on-chip, full-speed secondary cache (similar to the Celeron's but twice the size), and the variable size motherboard mounted cache on the Socket 7 main board became a tertiary level.
In execution, however, the design was not simple: with 21.4 million transistors, it was a very large chip to manufacture with early 1999 technology, and the K6 core design did not scale well past 500 MHz. Nevertheless, the K6-III 400 sold well, and the K6-III 450 was clearly the fastest x86 chip on the market on introduction, comfortably outperforming AMD's K6-2s and Intel's Pentium IIs.

References:  AMD K6-III Tech Docs

3 new AMD K6-III in the collection:


AMD K6-2+ Processor

The K6-2+ is a revised version of the K6-III. Essentially, the K6-2+ is a K6-III with a 128 KB L2 cache made on a new 180nm production process. It was also the first processors to be available with the PowerNow! power saving technology. Essentially, the power savings were achieved with a combination of frequency (through adjusting multipliers) and voltage reduction.

References: AMD K6-2+ Data Sheet [pdf]  c't about first availability in Germany

1 new AMD K6-2+ in the collection:


Enhanced AMD Am486 Processors

Enhanced Am486, built around the standard AMD 486 core, incorporated write-back cache and enhanced power management features. These characteristics made them a good choice for reduced power consumption desktop systems and for the portable market segment. With clock-tripled performance speeds up to 120 MHz, these 3-V CPUs offered great price/performance value for both desktop and portable computers by providing power management and write-back enhanced features at no extra premium.
The enhanced Am486 microprocessors featured enhanced power management features, including SMM and clock control. These enhancements allow reduced power consumption during system inactivity. The SMM function is implemented with an industry standard two-pin interface. In write-back mode, frequently used data is stored in the high-speed internal cache and accessed continually from within until the data is modified, thus increasing the performance of the CPU.

9 new Enhanced AMD Am486 in the collection:

AMD A80486DX2-66NV8T
Enhanced Am486, 8 KB write-through cache
AMD Am486DE2-66V8TGC
Enhanced Am486, 8 KB write-through cache, commercial range 0 - +85C
References: Datasheet
AMD A80486DX2-66SV8B
Enhanced Am486, SMM, 8 KB write-back cache
AMD Am486DX2-66V16BGC
Enhanced Am486, 16 KB write-back cache, commercial range 0 - +85C
References: Datasheet
AMD A80486DX2-80 V8T
Enhanced Am486 with ICE microcode, 8 KB write-through cache
AMD A80486DX4-90NV8T
Enhanced Am486, 8 KB write-through cache
AMD A80486DX4-100NV8T
Enhanced Am486, 8 KB write-through cache
AMD Am486DX4-100V16BGC
Enhanced Am486, 16 KB write-back cache, commercial range 0 - +85C
AMD Am486DX4-100SV16BGI
Enhanced Am486, 16 KB write-back cache, SMM, industrial range -40 - +100°C

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