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Category Archives: Technical

Apple Works – converting files

Apple Works, and previously Claris Works files cannot be opened in any current version of  iWorks (Pages, Numbers, Keynote)

Fortunately there is a way to convert those old files to a format which can at least be opened.

 

Libre Office is available as a  free download and will open many file types including Claris/Apple works files

Once opened they can then be saved out in another format which can be read by other programs such as Microsoft Word, Excel etc.

 

Libre Office Download (Free)

 


Links to other articles on this topic:

 

Abandoning AppleWorks 

http://rfwilmut.net/notes/aw/page1.html

Ink Jet Printers – replacement cartridge problems

Problems with replacement inkjet cartridges not working correctly can often be avoided by following these installation instructions:

  • Allow the cartridges to stand upright ( the same way they sit in the printer ) for at least a couple of hours before  installation
  • Do not shake the cartridges prior to  installation
  • Make sure that the yellow rip tabs are fully removed before installation and allow the cartridge to breathe for 30  seconds or so before putting it into the printer.
  • Do not tip the cartridges once the yellow rip tab  has been removed.
  • Fit the cartridges as a full set.
  • If the print pattern is poor after loading then perform up to 3 successive head cleans. If prints are still poor then switch off the printer (use the printer ON/OFF button not the power outlet) and leave  it for at least three hours to allow any trapped air to disperse before trying again.

Constantly removing and replacing cartridges that have already been installed, particularly with Epson printers, can cause problems as it will pump air into the system. The cartridges are not designed to be removed once installed.

RAM

 

 

RAM Types

       

DDR SDRAM – 184-pin SDRAM, 200-pin SO-DIMM
Introduced in 2001. Transfers data twice per clock cycle, doubling the data rate
Standard Name Memory Clock Cycle Time I/O Bus clock Data transfers per second Module Name Peak transfer rate
DDR-200 100 Mhz 10 ns 100 Mhz 200 million PC-1600 1600 MB/s
DDR-266 133 Mhz 7.5 ns 133 MHz 266 million PC-2100 2100 MB/s
DDR-300 150 Mhz 6.67 ns 150 MHz 300 million PC-2400 2400 MB/s
DDR-333 166 Mhz 6 ns 166 Mhz 333 million PC-2700 2700 MB/s
DDR-400 200 Mhz 5 ns 200 MHz 400 million PC-3200 3200 MB/s
             

Micron DDR SDRAM SODIMM Data sheet

 


DDR2 SDRAM – 240 Pin DIMM, 200 Pin SO-DIMM
Introduced in 2004
Standard Name Memory Clock Cycle Time I/O Bus clock Data transfers per second Module Name Peak transfer rate
DDR2-400 100Mhz 10 ns 200 Mhz 400 million PC2-3200 3200 MB/s
DDR2-533 133Mhz 7.5 ns 266 MHz 533 million PC2-4200 4266 MB/s
DDR2-667 166Mhz 6 ns 333 MHz 667 million PC2-5300 5333 MB/s
DDR2-800 200Mhz 5 ns 400 Mhz 800 million PC2-6400 6400 MB/s
             

DDR3 SDRAM – 240 Pin DIMM, 204 Pin SO-DIMM
 
Standard Name Memory Clock Cycle Time I/O Bus clock Data transfers per second Module Name Peak transfer rate
DDR3-800 100Mhz 10 ns 400 Mhz 800 million PC3-6400 6400 MB/s
DDR3-1066 133.3Mhz 7.5 ns 533.3 MHz 1066.6 million PC3-8500 8533.3 MB/s
DDR3-1333 166.6Mhz 6 ns 666.6 MHz 1333.3 million PC3-10600 10666.6 MB/s
DDR3-1600 200Mhz 5 ns 800 Mhz 1600 million PC3-12800 12800 MB/s
DDR3-1866 233.3Mhz 4.3 ns 933.3 Mhz 1866.6 million PC3-14900 14933.3 MB/s
DDR3-2133 266.6Mhz 3.75 ns 1066.6 Mhz 2133.3 million PC3-17000 17066.6 MB/s
             

DDR4 SDRAM – 288 Pin DIMM, 260 Pin SO-DIMM
 
Standard Name Memory Clock Cycle Time I/O bus clock (MHz) Data Rate (MT/s) Module Name Peak transfer rate
DDR4-1600      800 1600 PC4-1600   12800
DDR4-1866      933⅓ 1866⅔ PC4-1866  14933⅓
DDR4-2133      1066⅔ 2133⅓ PC4-2133  17066⅔
DDR4-2400      1200 2400 PC4-2400  19200

 


Links to articles:

SDRAM http://en.wikipedia.org/wiki/SDRAM