Photoshop :: CS6 Very Slow On Rendering Type?

I have a notebook with specification as mentioned below :
 
Lenovo Ideapad Y470P 2nd generation Intel Core i7-2670QM Processor( 2.2GHz 1333MHz 6MB) Windows 7 Ultimate x64 AMD Radeon HD 7690 2GB 8.0GB PC3-10600 DDR3 SDRAM 1333 MHz 750GB 5400  

I'm using Adobe Photoshop CS6 (64 Bit) for doing my job.Right now, i have a task to create a banner with dimension 800 x 900 Centimeters with Resolution 300 DPI and Color Mode RGB 16 Bit.The file size when blank is about 56.1 GB.The problem is, when i add some text with Horizontal Type Tool and click on the Move Tool, the Rendering Type screen show up and take a very very long time to finished.
 
I have made some configurations to my Photoshop that i found on Adobe Forum, but the problem still persisted.

Some configurations that i've made is :

- Turn off the Automatically Save Recovery Information

- Set Maximize PSD and PSB File Compatibility to Ask

- Set the Memory Usage to 95%

- Set the Cache Levels to 8 and Cache Tile Size to 1024K

- Set the Graphics Advanced Settings to Drawing Mode Advanced, and Check the option Use Graphics Processor To Accelerate Computation, and Uncheck the option Anti-Alias and 30 Bit Display

- Set the Scratch Disk to another partition ( C:System D:PageFile E:Data F:Scratch Disk)
 
And after all of that configuration, my Photoshop still slow when Rendering Type.