Multiple BSODs when watching videos/playing games

It's the motherboard, I bet you $1.
Replace the MB (different brand, IMHO Intel or Gigabyte)
It's not the memory or graphics drivers.
I mean EVO causes all kinds of grief for me. As far as I can see the processor is being starved for power...
You can just replace the board and be done with it. OR SUFFER!
OR
It's really the driver that interfaces your internet modem, and a lot of times if the internet is connected USB.
Instead if you can, connect to the computer with the Ethernet jack instead of USB.
Remove the USB driver for interfacing the modem. (it's in the internet provider software)
A lot of times on EVO, we just put in a PCI Ethernet card. Then connect the modem to this ethernet jack. This stops you from pulling your hair out, trying to deal with the Asus drivers...to tell you the truth IMHO, those drivers are fubar.
If you insist on using EVO board, then here is some suggestions:
"Save Power"
This causes you to have problems on some computers. You expect high performance and you are not getting it. OR You system freezes…
If you are on laptop battery power, these high performance settings cause the battery to run down faster. These settings are really for high performance desktop PC.

A. When these power saver features are enabled, it causes a bunch of problems.
B. Windows shuts down your system to sleep, hibernate, standby, etc..etc...
C. After shutting down system to "save power" the system malfunctions when you try to wake it up again...and locks up, freezes, etc...
It locks the mouse, it locks the keyboard, it shuts off the display, and locks out the hard drive, it shuts off USB devices, etc...etc...
D. This will cause you to pull your hair out, and go to the funny farm...(those nice young men in their pretty white coats)
E. Make it stop, please make it stop.
F. Shut off all these "features" and USE your computer for a change):

Click Start, Click Control Panel,
Look at the top of the window, in the path bar you see “control panel >”
Click on “>” (in the path bar) now click on “all control panel options.”
(This will open up all the hidden controls available)
Click Power Options
click on the arrow to “show other plans”
Check the Box that says "high performance"
Click (in high performance) "change plan settings"
Turn off display: set to NEVER
Put the computer to sleep: set to NEVER
Click: Change advanced plan settings
Scroll down the list: Click on the + signs to expand the choices for each item on the list.
Require a password on wake up: set to NO
Hard disk: turn off the hard disk: set to NEVER
Wireless adapter settings:
Sleep: set to NEVER
Allow Hybrid sleep: set to NEVER
Hibernate after: set to NEVER
Allow wake timers: set to disable
USB settings:
USB selective suspend setting: set to NEVER
Power Buttons and lid:
Power button action: Setting: set to shut down
Sleep Button Action: set to: do nothing
PCI Express:
Link State Power Management, Setting: OFF
Processor Power Management: Minimum state (set to) 7%

System Cooling Policy: setting: Active
Maximum State (set to) 100%
Display
Turn off display after: setting: NEVER (turning off display automatically can cause freezing also)
Turn off the monitor power manually, when you want it off. Don’t use the auto monitor turn off.
Multimedia Settings:
When Sharing Media: Setting: Prevent idling to sleep
When Playing Video: Setting: Optimize Video
Click APPLY
Click OK

Open the bios set up and make sure "cool and quiet" is OFF. (AMD)
If there is a power saver or a "quiet mode" in the bios, shut it off...
There may be a performance setting in the bios setup you have...make sure it's cranked up to max.
in the bios, see that the allocation for video, if available, is maxed.

Now open the hardware manager profiles...
click start
click computer
click system properties
click device manager
double click on mice and other pointing devices
right click on HID compliant mouse
left click on properties
click on the power management tab
UN-check the box that says: "allow the computer to turn off this device to save power." (there is now NO check mark in this box)
click OK

Now repeat this procedure for all mice, monitors, keyboards, and ALL USB ports on the device manager list.

You must open ALL the devices one at a time, as above, and turn off the power saver, for each device.

your mb has a lot of bios updates for bug fixes and ram. M4A785TD-V EVO BIOS 2105 is the last bios i would flash the bios to the newest rev and see if that helps. if not try using one gpu and see if it a sli issue with the mb. also make sure you have the newest mb chipset drivers installed.