Dell OptiPlex 3050, Руководство пользователя

Страница: 45 / 66

Verifying system memory in Windows 10 and Windows 7
Windows 10
1 Click the Windows button and select All Settings > System .
2 Under System , click About .
Windows 7
• 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.
DDR4
DDR4 (double data rate fourth generation) memory is a higher-speed successor to the DDR2 and DDR3 technologies and allows up to 512
GB in capacity, compared to the DDR3's maximum capacity of 128 GB per DIMM. DDR4 synchronous dynamic random-access memory is
keyed differently from both SDRAM and DDR to prevent the user from installing the wrong type of memory into the system.
DDR4 needs 20 percent less or just 1.2 volts, compared to DDR3 which requires 1.5 volts of electrical power to operate. DDR4 also supports
a new, deep power-down mode that allows the host device to go into standby without needing to refresh its memory. Deep power-down
mode is expected to reduce standby power consumption by 40 to 50 percent.
DDR4 Details
There are subtle differences between DDR3 and DDR4 memory modules, as listed below.
Key notch differenc e
The key notch on a DDR4 module is in a different location from the key notch on a DDR3 module. Both notches are on the insertion edge,
but the notch location on the DDR4 is slightly different, to prevent the module from being installed into an incompatible board or platform.
Technology and components 45