Which of the following can be used to increase the physical memory on your Windows 7 PC and increase the speed?

A.
PhysiRAM

B.
Aero Glass

C.
DirectAccess

D.
ReadyBoost

Explanation:
ReadyBoost
Windows 7 supports Windows ReadyBoost. This feature uses external USB flash drives as a hard disk cache to improve disk read performance. Supported external storage types include USB thumb drives, SD cards, and CF cards. Since ReadyBoost will not provide a performance gain when the primary disk is an SSD, Windows 7 disables ReadyBoost when reading from an SSD drive.

External storage must meet the following requirements:

* Capacity of at least 256 MB, with at least 64 KB of free space.The 4 GB limit of Windows Vista has been removed.
* At least a 2.5 MB/sec throughput for 4 KB random reads.
* At least a 1.75 MB/sec throughput for 1 MB random writes.