Unformatted text preview: GP slot.
AGP slot NOTE The AGP slot is almost universally brown in color, making it easy
to spot. PCI-X
PCI Extended (PCI-X), available in such systems as the Macintosh G5, is a huge enhancement to current PCI that is also fully backward compatible in terms of both hardware and
software. PCI-X is a 64-bit-wide bus (see Figure 8-10). Its slots will accept regular PCI cards.
The real bonus of PCI-X is its much enhanced speed. The PCI-X 2.0 standard features four
speed grades (measured in MHz): PCI-X 66, PCI-X 133, PCI-X 266, and PCI-X 533.
PCI-X slot The obvious candidates for PCI-X are businesses using workstations and servers, because they have the “need for speed” and also the need for backward compatibility. Large
vendors, especially in the high-end market, are already on board. HP, Dell, and Intel
server products, for example, support PCI-X. A quick online shopping trip reveals tons of
PCI-X stuff for sale: gigabit NICs, Fibre Channel cards, video adapters, and more. Mini-PCI
PCI has even made it into laptops in the specialty Mini-PCI format (Figure 8-11). You’ll
find Mini-PCI in just about every laptop these days. Mini-PCI is designed to use low
power and to lie flatboth good features for a laptop expansion slot. Mini-PCI returns
in Chapter 21, “Portable Computing.” ch08.indd 297 12/14/09 2:49:21 PM All-In-One / CompTIA Network+ All-in-One Exam Guide / Meyers & Jernigan / 170133-8 / Chapter 8 CompTIA A+Certification All-in-One Exam Guide 298 Figure 8-11
Tiny card in MiniPCI slot. See the
contacts at the
bottom of the
picture? PCI Express
PCI Express (PCIe) is the latest, fastest, and most popular expansion bus in use today. As
its name implies, PCI Express is still PCI, but it uses a point-to-point serial connection
instead of PCI’s shared parallel communication. Consider a single 32-bit chunk of data
moving from a device to the CPU. In PCI parallel communication, 32 wires each carry one
bit of that chunk of data. In serial communication, only one wir...
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- Spring '10
- PCI Express, Computer buses, expansion bus, All-in-One Exam Guide, CompTIA Network+ All-in-One