Thursday, November 15, 2007

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Flash Memory Cards



The most popular types of flash memory cards for use in digital
cameras are: Secure Digital (SD), CompactFlash (CF), Memory
Stick (MS), MultiMediaCard (MMC) xD-Picture Card (xD) and
SmartMedia (SM).

The type of memory card you use is dictated by which digital
camera you buy. These cards are physically different and are
-not-
interchangeable.

eBay has become notorious for "fake memory card" sales,
thousands of people have been scammed by sellers who
are selling inferior or lower capacity cards that have been
relabeled and repackaged to look like the real thing. Buyer
beware - I recommend that you purchase your cards only from
reputable online vendors or brick and mortar stores. If you
must buy on eBay then check out this page at Overclockers.
com.au for ways to visually identify some (not all) of the most
popular fake cards. Also see our public discussion forum for more info.

LATEST CPU

The Danger Den TDX is the latest CPU waterblock design from Danger Den.
The TDX has a copper baseplate, two chrome HF (high flow) barbs, and a
lexan (brass available) top. As with the RBX (their previous waterblock),
several different nozzles are available to tune the TDX's inlet restriction
to match your cooling loop. Mounting is done with bolts and springs through
motherboard mounting holes and the TDX top plate, and top plates are
available to use the TDX with AMD's Socket 462 (Socket A), all Athlon64
sockets, and Intel Socket 478 (Pentium 4) and Socket 603/604 (Xeon)

motherboards.

Here's what Dangerden said about the TDX design concept:

"Based off the popular RBX waterblock design, the TDX takes advantage of
all the features and performance levels that made the RBX one of the best
performing waterblocks on the market, while simplifying and improving the
user interface. Key features of the TDX include:

Mother Board

Most after-market motherboards produced today are designed for so-called IBM-compatible computers, which hold over 96% of the personal computer market today.[2] Motherboards for IBM-compatible computers are specifically covered in the PC motherboard article.

The basic purpose of the motherboard, like a backplane, is to provide the electrical and logical connections by which the other components of the system communicate.

A typical desktop computer is built with the microprocessor, main memory, and other essential components on the motherboard. Other components such as external storage, controllers for video display and sound, and peripheral devices are typically attached to the motherboard via edge connectors and cables, although in modern computers it is increasingly common to integrate these "peripherals" into the motherboard.



The Octek Jaguar V motherboard from 1993. This board has 6 ISA slots but few onboard peripherals, as evidenced by the lack of external connectors.
The Octek Jaguar V motherboard from 1993.[6] This board has 6 ISA slots but few onboard peripherals, as evidenced by the lack of external connectors.

Additionally, nearly all motherboards include logic and connectors to support commonly-used input devices, such as PS/2 connectors for a mouse and keyboard. Early personal computers such as the Apple II or IBM PC included only this minimal peripheral support on the motherboard. Additional peripherals such as disk controllers and serial ports were provided as expansion cards.

Given the high thermal design power of high-speed computer CPUs and components, modern motherboards nearly always include heatsinks and mounting points for fans to dissipate excess heat.

Integrated peripherals

Diagram of a modern motherboard, which supports many on-board peripheral functions as well as several expansion slots.

With the steadily declining costs and size of integrated circuits, it is now possible to include support for many peripherals on the motherboard. By combining many functions on one PCB, the physical size and total cost of the system may be reduced; highly-integrated motherboards are thus especially popular in small form factor and budget computers.