You get two 64-bit doubles at the same time which is normalized as 53 bits of significance. In the AMD Opteron there is 128-bit XXM registers, but you do not get 128-bit precision. Normalized as 64 bits of significance 1 bit sign 15 bits exponent It may change the DWG and also affect many other core functionsĮxtended-precision format: 80-bit data width, 18 to 20 digit precision

We have been researching the implications of going to the maximum allowed by the 32 & 64-bit processors which is 80-bit. Normalized as 53 bits of significance 1 bit sign 10 bits exponent The current 64-bit Precision Limit: Double-precision format – 64-bit data width, 15 to16 digit precision No other known CAD or geometry kernel I know of exceeds this 64-bit precision and a few CAD systems just recently got this level of precision after the year 2000 about 15 years later than AutoCAD. The IEEE-754 and 854 standards specify the numeric formats, value sets, and how the basic floating point arithmetic works.ĪutoCAD Currently used 64-bit precision and has since the early 80s. Unfortunately it does not in either the Intel or AMD processors that have been announced to this date. I was hoping that the 64-bit platform would offer a 128-bit double precision floating point allowing for 30-32 digit double extended precision. I mentioned the AMD Opteron and the increased performance with standard AutoCAD 2004 in my post to this blog on October 25th 2003 ' 64 bit Computers & AutoCAD'.

Display resolution : Graphics card 1280 x 1024 32-bit color video display adapter (True Color) 128 MB or greater, OpenGL®, or Direct3D® capable workstation class graphics card.I am posting more on the 64-bit CPUs that are slowly coming to market from both Intel & AMD.Memory: 1 GB (Windows XP SP2), 2 GB or greater (Windows Vista).CPU: Intel® Pentium® 4 processor or AMD® Athlon, 2.2 GHz or greater or Intel or AMD Dual Core processor, 1.6 GHz or greater.You can download Internet Explorer from the Microsoft website: You cannot install AutoCAD if Microsoft Internet Explorer 6.0 with Service Pack 1 (or later) is not installed on the installation workstation.Browser: Internet Explorer 6.0 SP1 or later.Operating system: Windows Vista Enterprise, Windows Vista Business, Windows Vista Ultimate, Windows Vista Home Premium, Windows XP Professional, Service Pack 2, Windows XP Home, Service Pack 2.

Autocad 2004 64-bit