Table of Contents
Advertisement
Windows 7
1
Click Start → Control Panel → System
Verifying system memory in setup
1
Turn on or restart your computer.
2
Perform one of the following actions after the Dell logo is displayed:
•
With keyboard — Tap F2 until the Entering BIOS setup message appears. To enter the Boot selection menu, tap F12.
3
On the left pane, select Settings > General > System Information,
The memory information is displayed on the right pane.
Testing memory using ePSA
1
Turn on or restart your computer.
2
After the Dell logo is displayed:
a
Press F12.
b Select ePSA diagnostics
The PreBoot System Assessment (ePSA) starts on your computer.
NOTE:
If you wait too long and the operating system logo appears, continue to wait until you see the desktop. Turn off
the computer and try again.
USB features
The Universal Serial Bus, or well known as USB was introduced to the PC world in 1996 which dramatically simplified the connection
between host computer and peripheral devices such as mice and keyboards, external hard drive or optical devices, Bluetooth and many
more peripheral devices in the market.
Let's take a quick look on the USB evolution referencing to the table below.
Table 1. USB evolution
Type
Data Transfer Rate
USB 3.0/USB 3.1 Gen 1
5 Gbps
USB 2.0
480 Mbps
USB 1.1
12 Mbps
USB 1.0
1.5 Mbps
USB 3.0/USB 3.1 Gen 1 (SuperSpeed USB)
For years, the USB 2.0 has been firmly entrenched as the de facto interface standard in the PC world with about 6 billion devices sold, and
yet the need for more speed grows by ever faster computing hardware and ever greater bandwidth demands. The USB 3.0/USB 3.1 Gen 1
38
Technology and components
Category
Super Speed
High Speed
Full Speed
Low Speed
Introduction Year
2010
2000
1998
1996
Advertisement
Table of Contents
