PC2100 DDR is designed for use in systems and motherboards which require a 133MHz front-side bus. While the system or motherboard may operate a 133MHz front-side bus, its effective front-side bus speed is 266MHz in DDR operation. To get the effective front-side bus speed of a DDR system, double the operating frequency. PC2700 DDR is designed for use in systems and motherboards which require a 166MHz front-side bus, with an effective front-side bus speed of 333MHz.

Generally all DDR is backward compatible and can run at any bus speed slower than it is rated to run. For example if your PC has a 266MHz FSB (Front Side Bus), you will need PC2100 266MHz DDR. If your PC has a 266MHz FSB, you can use PC2100 266MHz or PC2700 333MHz DDR. All PC’s that accept PC2100 DDR will also accept PC2700 DDR; however your memory will only run as fast as the slowest link in your system.

DDR memory has been manufactured to be backward compatible so you can add faster memory modules to your machine. For example, if you install a PC3200 module alongside an original PC2700 module the memory will wor and be fully compatible but you will not gain any performance benefit, as the PC3200 module will be clocking down to PC2700 to run alongside the original PC2700 module installed.

Ans: The numeral portion of DDR memory represents the "MB/s" of the RAM, so PC2700 is rated at 2.7GB/s (2700MB/s) and so forth.

Although these are all types of double data rate (DDR) memory, the varying numbers refer to the different speeds of memory your computer was designed for. Crucial no longer carries PC2100 (DDR266) memory, but PC2700 (DDR333) memory and PC3200 (DDR400) are backward-compatible with PC2100. Memory is designed to be backward-compatible, so generally speaking, you can safely add faster memory to a computer that was designed to run slower memory.

The amount of memory rdiff-backup uses should not depend much on the size of directories being processed. Keeping track of hard links may use up memory, so if you have, say, hundreds of thousands of files hard linked together, rdiff-backup may need tens of MB. If rdiff-backup seems to be leaking memory, it is probably because it is using an early version of librsync. librsync 0.9.5 leaks lots of memory. Later versions should not leak and are available from the librsync homepage.

Mac computers and printers use a variety of memory, which is called "SIMMS" or "DIMMS" or "VRAM". Most of my memory is sold from a Mac Memory Web page. I provide some descriptions there of memory for most of the systems I sell, but not for the printers. For printers you'll probably have to look at Apple's manual or an Apple document. While I try to identify issues and problems when I can, it is up to YOU the customer to determine what memory and how much memory you need.

SPD (serial presence detect) is a small non-volatile RAM chip attached to SDRAM modules that contains information about the memory, including the number of row addresses, number of column addresses, error detection/correction, refresh rates, data width, and the interface standard. It also contains information such as the module serial number and manufacturer code. When your computer starts, it sets the row and column settings and the timings for the module based on the information in the SPD.

Test from PC Magazine January 28, 1992] There are several RAM cards out there for the PS/2 and you do not necessarily need a 32 bit card to get the max performance as will be shown. (all cards tested on a Model 70-A21). KEY: %READ = The read speed of memory using 4K blocks in sequence from 0MB to 16MB in relation to motherboard memory writes. %WRITE = The write speed of memory using 4K blocks in sequence from 1MB to 16MB blocks in relation to motherboard memory writes.

The hard drive on my 61xx is giving me a blinking question mark and I can't get it to boot off another drive. Help!

A 'Motherboard' is the main circuit board in a computer. It is into this board that the CPU (Central Processing Unit) or 'processor' is plugged. The CPU is the part of the computer that processes information and carries out all calculations.

I'm trying to populate a Cluster database. The loading process terminates prematurely and I get an error message like this one: ERROR 1114: The table 'my_cluster_table' is full

Important Note: Your humble authors got tired of writing dry formal technical prose in the rest of this document, and succumbed to the temptation to try to be funny in parts of this appendix. Sarcasm abounds here. Please do not take any of this personally! The humor-impaired should interpret my comments not as attacks on them, but as an attempt to make fun of myself for being impatient with you, my devoted and valued, if sometimes demanding, users.

Consult your user/owner's manual for details about the original memory configuration and capacity. If you've misplaced the manual, you may be able to contact the retailer where you bought the PC from. If you have a hand-me-down PC or inherited a pre-owned PC, you probably may not have the user manual or know any detail of the original memory configuration or the memory configuration may have been changed.

Most PSEmuPro-based emulators use raw memory card images, which is the same format that pSX uses, simply with a different file extension. pSX can use the files, regardless of the extension, just select the file in the memory card configuration.

Q: Which program do I use for word processing, spreadcheat calculations, image processing, burning, scanning, surfing, chatting...

First boot KNOPPIX with the memory stick inserted. Got to the KNOPPIX menu, Configuration, Save Configuration. When asked, choose /dev/sda1. When booting type knoppix myconf=scan home=scan at the boot prompt. This is an issue with the Dell BIOS. Simply pull out the power cord from your computer for a few seconds, and your computer should start again. You can also try passing "apm=off" or "apm=real-mode-poweroff" to the kernel during startup.