I am having a bit of an issue with my G74 from Asus.
It recently ate up the two stock hard-drives that it came with (two  Western Digital 750GB Scorpio Black [WD7500BPKT]
So, wanting to upgrade and squeeze a little more performance out of it I purchased two Seagate Momentus XT 750 GB 7200RPM SATA 6Gb/s 32 MB Cache 2.5 Inch Solid State Hybrid Drive ST750LX003.
Drive one installed on the primary slot works wonderfully; drive two on the second slot does not read in windows, but does read in certain parts of the bios.
Also worth noting for this device I have purchased four  sticks of Corsair 8GB Dual Channel DDR3 SODIMM Memory Kit (CMSO16GX3M2A1333C9) for a total of 32gb of ram, when filled with the 32gb of ram the G74SX-3DE refuses to boot even to Bios. I replaced the 16gb DDR3 [4 x 4gb] and it boots and processes fine.
Any and all suggestions and info is appreciated.
Specs as follows:
Processor Intel® Core™ i7 2630QM Processor
Operating System Genuine Windows® 7 Home Premium 64bit
This version contains all product updates (SP1)
Chipset Intel® HM65 Express Chipset
Memory DDR3 1333 MHz SDRAM, 4 x SO-DIMM socket for expansion up to 16 GB SDRAM (Quad Core), 2 x SO-DIMM socket for expansion up to 8 GB SDRAM (Dual Core)
Display 17.3" 16:9 HD+ (1600x900)/Full HD (1920x1080)/Full HD 3D(1920x1080 120Hz) LED Backlight
Graphic NVIDIA® GeForce® GTX 560M with 3GB GDDR5 VRAM
Storage 2.5" SATA
500GB 7200rpm SSH
Dual HDD Support*1
Optical Drive Blu-Ray DVD Combo
Card Reader 3 -in-1 card reader ( SDXC/ MS/ MMC)
Camera HD Web Camera
Networking Integrated 802.11 b/g/n
Built-in Bluetooth™ V3.0 (Optional)
10/100/1000 Base T
Interface 1 x Microphone-in jack
1 x Headphone-out jack
1 x USB 3.0 port(s)
3 x USB 2.0 port(s)
1 x RJ45 LAN Jack for LAN insert
1 x HDMI
Audio Built-in Speakers And Microphone
EAX Advanced HD 5.0
Battery 5200 mAh 74 Whrs
Power Adapter Output :
19 V DC, 6.3 A, 150 W ((Quad Core)) , 120 W ((Dual Core))
100 -240 V AC, 50/60 Hz universal
Dimensions 32.5 x 42 x 2.09 ~6.2 cm (WxDxH)
Weight 9.4 lbs (with 8 cell battery)
Security Kensington lock
Note *1 : dual HDD support up to 1.5TB / Solid State Hybrid drive up to 1TB