This page will show all objects that classify as AMD Am486. The Am486 has been made by Advanced Micro Devices, a multinational semiconductor that develops microprocessors, chipsets and graphic processors (ATi). AMD is the second largest microprocessor manufacturer after Intel and has active since 1969.
In 1982 AMD signed a contract with Intel to become a licensed second-source manufacturer. IBM wanted the Intel 8086/8088 but IBM's policy stated that at least two suppliers should be available. This is why the first AMD processors always have 'Intel' printed somewhere. After a while AMD didn't get the license to produce Intel processors anymore and thus AMD started cloning the 386 and launched the Am386. Since the AMD K5, AMD didn't clone the Intel processor but started developing on their own. The K5 wasn't a big success but thanks to NexGen that merged into AMD the K6 could be made. AMD could compete and has a range of processors today including six-core Opterons and a good performing quad-core for the desktop called the Phenom II X4.
AMD also acquired ATi to get in-house graphics chips. These are integrated in chipsets to create cheap motherboard solutions. In the future (The Future is Fusion as AMD calls it) the plans are to integrate the graphics chip into the processor.
AMD Am486 DX40 '24361'
This is not the chip that people hoped it would be. AMD's 40MHz 386 ran very well and was quite fast for a 386 because the front-side-bus (FSB) did it's job at 40MHz as well. The 486 model, however, was usually plugged into a normal motherboard with Vesa Local Bus (VLB) slots. These slots ran fine at 25MHz or 33MHz but often caused problems when running at 40MHz or even 50MHz. Because of this the 40MHz part was less common. > Read more
Same as the 66MHz part but somewhat slower. > Read more
AMD's version of the 486DX2/66. Runs practically the same as the Intel 486DX2/66. Sometimes the Intel part is a bit, but in real life unnoticeable, faster and sometimes the AMD part is a bit faster. > Read more
AMD's 80MHz 486, nothing spectacular actually. However, Interesting to see is that Intel never made DX40 or DX2/80 486 processors. They always sticked to the more common front-side-bus (FSB) clock frequencies that were more reliable in the old days. At the time that the 486 was new it was difficult to get it running at a 40MHz FSB busfrequency but later motherboards could handle 40MHz easily so DX2/80 processors didn't cause trouble.
While configuring this CPU I also tried the settings for the DX4/120. It turned out that this DX2/80 can also run at 120MHz but unfortunatly it was unstable.
Also note that this CPU is model NV8T which is a normal AMD 80486 CPU. The SV8B models are Enhanced Am486 CPU's that have write-back L1-cache. > Read more
Just like the other Am486 CPU's but with the 100MHz-barrier broken.
This model is also known as the Enhanced Am486DX4-S 100MHz because is has write-back L1-cache. CPU's with write-back cache are slightly faster than CPU's with write-through cache. > Read more
One of the faster 486 processors. The 120MHz model is up to speed with it's 40MHz front side bus (FSB). Unfortunatly the 40MHz FSB is not always a big improvement over the 33MHz FSB. In my case the DX4/120 doesn't run Doom faster than a DX4/100 because the PCI bus is clocked lower when using the 40MHz bus. This affects Doom quite a bit as seen in the benchmarks. Other benchmarks, especially those that don't use the PCI-bus much, run a lot faster 
. > Read more