Know The Computer

Sabtu, 17 Maret 2012

RAM DDR3

DDR3 (Double Data Rate)

The most visible advantages on DDR3 RAM is the required power consumption is reduced approximately 16% compared with other words DDR3 DDR2 requires less power than DDR2. This is because DDR3 is already using the technology as much as 90 nm with a pin 240, so that the required power consumption is only 1.5v, much less when compared to DDR2 and DDR 2.5V 1.8v. In theory, held by the RAM speed is quite stunning. He was able to transfer data with an effective clock of 800-1600 MHz. In the 400-800 MHz clock, much higher than DDR2 at 400-1066 MHz (200-533 MHz) and DDR for 200-600 MHz (100-300 MHz). The prototype of DDR3 is already introduced long ago in early 2005. However, the product itself actually appeared in mid-2007 along with a motherboard that uses Intel P35 Bearlake chipset and the motherboard is already supporting slot DIM
M Memory DDR3-1600. Besides having different power supply with DDR2, the location of key notch on both different but both have 240 pins. DDR3 RAM module to have a high precision calibration resistors and Fly-by command / address / control bus with On-DIMM termination, in which fi-fi tour touring owned by DDR3 is not present in previous generations. Some tours fi DDR3 owned by, among others:

 
_ Asynchronous RESET pin.
_ Support for system-level fl ight time compensation.
_ On-DIMM Mirror friendly DRAM pin out.
_ CWL (CAS Write Latency) per speed bin.
_ On-die IO engine calibration.
_ READ and WRITE calibration.

 
Because of more efficient power supply, it is widely used in laptops. So as to save batery.
Here's an overview of RAM: 
 

Rabu, 14 Maret 2012

RAM


RAM (Random Access Memory) is a type of storage that serves tokeep the processes on a computer whose contents can beaccessed in any order that the data is in memory. RAM typically has a capacity for storing small because only the computer that is being done. When compared with magnetic memory, RAM capacity is very small.
Semiconductor companies like Intel debuted with the manufactureof RAM, more precisely the type of DRAM.
Usually the RAM can be written and read, as opposed to ROM(read-only-memory), RAM is usually used for primary storage (main memory) in computers to use and modify information actively,although some tools use some type of RAM to provide secondarystorage period term.
But there is also the opinion that the ROM is another type of RAM,because it is also true random access as well as SRAM or DRAM.It's just really the process of writing the ROM requires a special process is not as easy and flexible as well as the SRAM or DRAM.In addition, some parts of addres space of RAM (main memory) ofa system that is mapped into one or two-chip ROM.
kinds of RAM :

Selasa, 13 Maret 2012

Difference AT and ATX Power Supply are:

1.With ATX Power Suplay we can shut down the computer through the operating system because the power on / offNya controlled by the motherboard while the PS AT must be done manually via a button / switch

2.Besides the PS type AT power cable to the motherboard separately with Pin 8 and Pin 9.

3.In Type ATX, the connector from the PS to the motherboard are not separate (one connector).

For the current ATX power supply connector type pin con-24 are more widely used

The following pictures ATdan ATX connector :

Kamis, 08 Maret 2012

maximize the use of a keyboard




How to work with computers using the shortcut on the keyboard? d
Please read this article and learn safely.



1. CTRL+C (Copy)
2. CTRL+X (Cut)
3. CTRL+V (Paste)
4. CTRL+Z (Undo)
5. DELETE (Delete)SHIFT+DELETE (Delete the selected item permanently without placing the item in the Recycle Bin)
6. CTRL+SHIFT while dragging an item (Create a shortcut to the selecteditem)
7. F2 key (Rename the selected item)
8. CTRL+RIGHT ARROW (Move the insertion point to the beginning of the next word)
9. CTRL+LEFT ARROW (Move the insertion point to the beginning of the previous word)
10. CTRL+DOWN ARROW (Move the insertion point to the beginning of the next paragraph)
11. CTRL+UP ARROW (Move the insertion point to the beginning of the previous paragraph)
12. CTRL+SHIFT with any of the arrow keys (Highlight a block of text)
13. CTRL+A (Select all)
14. F3 key (Search for a file or a folder)
15. ALT+ENTER (View the properties for the selected item)
16. ALT+F4 (Close the active item, or quit the active program)
17. ALT+ENTER (Display the properties of the selected object)
18. ALT+SPACEBAR (Open the shortcut menu for the active window)
19. CTRL+F4 (Close the active document in programs that enable you to have multiple documents open simultaneously)
20. ALT+TAB (Switch between the open items)
21. ALT+ESC (Cycle through items in the order that they had been opened)
22. F6 key (Cycle through the screen elements in a window or on the desktop)
23. F4 key (Display the Address bar list in My Computer or Windows Explorer)
24. SHIFT+F10 (Display the shortcut menu for the selected item)
25. ALT+SPACEBAR (Display the System menu for the active window)
26. CTRL+ESC (Display the Start menu)
27. ALT+Underlined letter in a menu name (Display the corresponding menu)
28. F10 key (Activate the menu bar in the active program)
29. RIGHT ARROW (Open the next menu to the right, or open a submenu)
30. LEFT ARROW (Open the next menu to the left, or close a submenu)
31. F5 key (Update the active window)
32. BACKSPACE (View the folder one level up in My Computer or Windows Explorer)
33. ESC (Cancel the current task)
34. SHIFT when you insert a CD-ROM into the CDROM drive (Prevent the CD-ROM from automatically playing)
35. CTRL+TAB (Move forward through the tabs)
36. CTRL+SHIFT+TAB (Move backward through the tabs)
37. TAB (Move forward through the options)
38. SHIFT+TAB (Move backward through the options)
39. ALT+Underlined letter (Perform the corresponding command or select the corresponding option)
40. ENTER (Perform the command for the active option or button)
41. SPACEBAR (Select or clear the check box if the active option is a check box)
42. Arrow keys (Select a button if the active option is a group of option buttons)
43. F1 key (Display Help)
44. F4 key (Display the items in the active list)
45. BACKSPACE (Open a folder one level up if a folder is selected in the
46. Windows Logo (Display or hide the Start menu)
47. Windows Logo+BREAK (Display the System Properties dialog box)
48. Windows Logo+D (Display the desktop)
49. Windows Logo+M (Minimize all of the windows)
50. Windows Logo+SHIFT+M (Restore the minimized windows)
51. Windows Logo+E (Open My Computer)
52. Windows Logo+F (Search for a file or a folder)
53. CTRL+Windows Logo+F (Search for computers)
54. Windows Logo+F1 (Display Windows Help)
55. Windows Logo+ L (Lock the keyboard)
56. Windows Logo+R (Open the Run dialog box)
57. Windows Logo+U (Open Utility Manager) Accessibility Keyboard Shortcuts
58. Right SHIFT for eight seconds (Switch FilterKeys either on or off)
59. Left ALT+left SHIFT+PRINT SCREEN (Switch High Contrast either on or off)
60. Left ALT+left SHIFT+NUM LOCK (Switch the MouseKeys either on or off)
61. SHIFT five times (Switch the StickyKeys either on or off)
62. NUM LOCK for five seconds (Switch the ToggleKeys either on or off)
63. Windows Logo +U (Open Utility Manager)
64. END (Display the bottom of the active window)
65. HOME (Display the top of the active window)
66. NUM LOCK+Asterisk sign (*) (Display all of the subfolders that are under the selected folder)
67. NUM LOCK+Plus sign (+) (Display the contents of the selected folder)
68. NUM LOCK+Minus sign (-) (Collapse the selected folder)
69. LEFT ARROW (Collapse the current selection if it is expanded, or select the parent folder)
70. RIGHT ARROW (Display the current selection if it is collapsed, or select the first subfolder)
71. RIGHT ARROW (Move to the right or to the beginning of the next line)
72. LEFT ARROW (Move to the left or to the end of the previous line)
73. UP ARROW (Move up one row)
74. DOWN ARROW (Move down one row)
75. PAGE UP (Move up one screen at a time)
76. PAGE DOWN (Move down one screen at a time)
77. HOME (Move to the beginning of the line)
78. END (Move to the end of the line)
79. CTRL+HOME (Move to the first character)
80. CTRL+END (Move to the last character)
81. SPACEBAR (Switch between Enlarged and Normal mode when a character is selected)
82. CTRL+O (Open a saved console)
83. CTRL+N (Open a new console)
84. CTRL+S (Save the open console)
85. CTRL+M (Add or remove a console item)
86. CTRL+W (Open a new window)
87. F5 key (Update the content of all console windows)
88. ALT+SPACEBAR (Display the MMC window menu)
89. ALT+F4 (Close the console)
90. ALT+A (Display the Action menu)
91. ALT+V (Display the View menu)
92. ALT+F (Display the File menu)
93. ALT+O (Display the Favorites menu)
94. MMC Console Window Keyboard Shortcuts
95. CTRL+P (Print the current page or active pane)
96. ALT+Minus sign (-) (Display the window menu for the active console window)
97. SHIFT+F10 (Display the Action shortcut menu for the selected item)
98. F1 key (Open the Help topic, if any, for the selected item)
99. F5 key (Update the content of all console windows)
100. CTRL+F10 (Maximize the active console window)

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