Difference Between USB 2.0 and USB 3.0

USB 3.0 Highlights and Benefits over USB 2.0

• Transfer rates: USB 2.0 offers transfer rates of 480 Mbps, and USB 3.0 offers transfer rates of 4.8 Gbps — 10 times faster.

• Addition of another physical bus: The amount of wires was doubled, from 4 to 8. Additional wires required more space in both the cables and connectors, so new types of connectors were designed.

• Power consumption: USB 2.0 provides up to 500 mA whereas USB 3.0 provides up to 900 mA. The USB 3 devices provide more power when needed and conserve power when the device is connected but idling.

• More bandwidth: Instead of one-way communication, USB 3.0 uses two unidirectional data paths, one to receive data and the other to transmit while USB 2.0 can only handle only one direction of data at any time.

• Improved bus utilization: A new feature was added (using packets NRDY and ERDY) to let a device asynchronously notify the host of its readiness.

What does the 1Rx8 mean vs. 2Rx8 for RAM and are they compatible?

Q = Are a 4GB 1Rx8 PC3L 12800S and a 4GB 2Rx8 PC3 12800S compatible? What do 1Rx8 and          2Rx8 mean? Can I put them together?

A = 1Rx8 means the memory chips are on one side of the RAM module and 2Rx8 means the memory chips are on both sides of the RAM module.

Compatibility is generally not an issue in most cases. But you should go through the motherboard manufacturer's guide of supported RAM modules just to make sure if they are compatible or not.

Coming to the PC3 and PC3L part, PC3 RAMs requires an operating voltage of 1.5V whereas PC3L requires an operating voltage of 1.35V. The 'L' in PC3L signifies Low Voltage. So using PC3 RAM in a PC3L RAM slot will not provide it sufficient voltage and it will fail to operate. On the other hand using a PC3L RAM in a PC3 RAM slot may damage it due to overvoltage. So PC3 and PC3L RAMs are not compatible with each other.

So in short 1Rx8 PC3L 12800S and 2Rx8 PC3 12800S RAMs are not compatible with each other. But if it is only the 1Rx8 and 2Rx8 in concern, they may be compatible with each other but it's best to check the motherboard manufacturer's list of compatible RAMs.

How to create rule for Auto Reply in Mircrosoft Outlook 2013.

1. In Outlook, from the main window, click on the File menu. Click on Automatic Replies.

2. In the Automatic Replies window, click on Send automatic replies. 

3. If you would like the replies to be sent for a limited period of time, set the dates in the Start time and End time fields. 

4. Now edit the email template for the replies to your colleagues under the Inside My Organization tab. 

5. You can choose to activate the out-of-office automatic replies for your external contacts too. Click on the Outside My Organization tab and check the option Auto-reply to people outside my organization.

If you want to send the replies only to people in your contacts list, select My Contacts only. Otherwise, let the default option selected (Anyone outside my organization).

6. If you don't need any rules for your out-of-office time, click on OK to close the Automatic Replies window. Otherwise, go to the next step.

If you want to add rules to manage emails during your out-of-office time

7. Still from the Automatic Replies window, Click on Rules... and in the pop-up window, click on Add Rule...

8. Add your criteria under the When a message arrives that meets the following conditions section. Select the action(s) under the Perform these actions section. 

9. There are advanced options if you click on the Advanced... button. You can set them too. Click on OK when done. 

10. Click on OK in the Automatic Reply Rules window, and then on OK in the Automatic Replies window.