When we have been changing computer hardware standards frequently, it has been one thing at a time. At other times those in authority say that if we are going to change one thing lets get some other changes done too. We are going through much more of the latter right now.

The thing that is more in the forefront of change currently is the move from PCI and AGP motherboard card slots to PCI Express (PCIe). PCI Express also changes the way data is transferred (serial rather than parallel) and has more intelligent data traffic management. This puts you in the position of having to decide whether to migrate to the AGP and PCI cards when upgrading to a new processor and motherboard or buying a new computer, something that is more of a problem if you recently paid a lot of money for a high end AGP graphics card or have a specialized PCI card where there is no equivalent PCIe card available. However, there are motherboards currently available that have both old and new type slots.

On the other hand you could go to the other extreme by buying a computer with the new NVIDIA SLI system. That is a motherboard with two PCIe graphics slots where you can run two NVIDIA graphics cards in parallel to get a 3D graphics performance boost similar to what was done to the old 3dfx Voodoo 2. We also started a shift last spring from Sockets 940 and 754 to Socket 939 for AMD 64 bit processors (Socket A remains for 32 Bit AMD processors) and from Socket 478 to 775 for Intel Pentium 4 processors, which also limits your upgrade options. Dual core processors, which have two CPUs on one chip, will be coming out for workstations, servers, and desktops in the second half of this year. Support for dual core processors will come from more of a BIOS change than socket change; however, some motherboards will be able to support dual core processors by upgrading your flash BIOS, but others will not. We also are making the transition from DDR to DDR2 system RAM, and some motherboards only support DDR2.

Now you think you have had enough. I am nowhere near finished. We now have a new power supply standard too. ATX Power Supply 2.01 is in process of replacing ATX Power Supply 1.3. Newer motherboards have different power connectors now. The new connector has 24 pins rather than the old one with 20. There have been adapters for the 1.3 power connectors to fit 2.01 compliant motherboards, but now we are going to move to adapters for 2.01 power supplies to fit into 1.3 compliant motherboards. Some motherboards and power supplies had AUX connectors, but the new standard does away with that. One thing that is nice with the new standard is that having SATA drive power connectors is now mandatory rather than optional. Also power supplies under the new standard are supposed to be more efficient. Nevertheless be aware that some power supply manufacturers have been exaggerating the capacity of their power supplies.

However, this new power supply standard is just a step in another transition, the move from the ATX motherboard and case design standards to BTX design standards. I say standards because there are three different BTX motherboard design formats: BTX, MicroBTX, and Pico BTX. BTX replaces the standard ATX motherboards, with MicroBTX going against the Mini-ATX motherboards and PicoBTX goes against the ITX motherboards. Part of the reasons for the change is to redesign the airflows in the case to get rid of all heat generated by the latest processors.

The airflow of BTX designs is from the front of the computer straight through to the back of the computer rather than typical lower front intake with exhaust in the upper back. The CPU has been repositioned towards the front of the computer so it gets the cool air first. That means a redesign of the power supply to a new BTX standard. Also a thermal module has replaced the standard CPU heat sink and fan. It takes a more global approach in covering the highest heat producing components sitting on the motherboard, including the CPU. Intel is the one who is pushing this because their Pentium 4s have higher clock speeds than an equivalent AMD Athlon 64 chip, which means they produce higher heat. There is so much heat that Intel had to abandon their goal of producing a 4 GHz Pentium 4 chip. As such AMD is not in such pressure to move to BTX, so BTX motherboards supporting AMD processors will be a few months behind those supporting Intel processors. The first BTX motherboards just recently came out, and should become dominate in 2006.
What does all this mean? By the second half of 2005 if you have a computer that is more than one year old it will probably be better to get an entire new computer rather than upgrade. This puts into motion another round of the old computer becoming the backup computer and the old backup computer becoming a boat anchor, flowerpot, or for the more adventurous: Christmas or Chanukah display control system for the whole house and yard. However, because there are so many changes with these transitions that many people will get a new computer sooner than normal, resulting in some of the retiring old backup computers being new enough to where nonprofit organizations and schools may want them. As such the probability is that not just those selling computers and computer components benefit from the chaos caused by this round of the wonder of computer hardware transitions.

Timothy Everingham is CEO of Timothy Everingham Consulting in Azusa, California. He is also Chair of the Los Angeles Chapter of ACM SIGGRAPH, the largest chapter of the Association for Computing Machinery's (ACM) Special Interest Group on Computer Graphics and Interactive Techniques and one of Southern California's significant professional organizations within the entertainment and media industries. He graduated from with honors with the double majors of Management Information Systems and Accounting from of California State University, Fullerton. He is also part-time press in the areas of high technology, computers, video, audio, and entertainment/media and has had articles published throughout the United States and Canada plus Australia, England, & Japan. He is a member of TUGNET. He is a member of TUGNET. Further information can be found at http://home.earthlink.net/~teveringham