Ibuypower builds. Help!!

[Redbull25]

Hello, I'm planning to buy an ibuypower computer.
First of all, I know little to nothing about computers and it would be great if I could get some professional insights.
My primary use for this pc would be gaming and I made two builds of my own.
If someone could take a look at my builds and tell me which one is a better buy and why, I would really appreciate it!
Also, if you see something that needs to be changed or it just won't work, please tell me what it is and how I could modify my build.
My Price range would be anything up to $1400. (which includes the microsoft windows 7 installation. So I guess without it, my range would be up to $1300)
This was my build 1:
Case::NZXT Guardian 921 RB Gaming Case Black w/ Red Light
Case Lighting::None
iBUYPOWER Labs - Noise Reduction::None
iBUYPOWER Labs - Internal Expansion::None
Processor::Intel® Core™ i7 3820 Processor (4x 3.60GHz/10MB L3 Cache)
iBUYPOWER PowerDrive::None
Processor Cooling::Liquid CPU Cooling System [SOCKET-2011] - ARC Dual Silent High Performance Fan Upgrade (Push-Pull Airflow)
Memory::8 GB [2 GB X4] DDR3-1600 Memory Module - Corsair or Major Brand
Video Card::AMD Radeon HD 7770 - 1GB - Single Card
Video Card Brand::Major Brand Powered by AMD or NVIDIA
Free Stuff::
Motherboard::[3-Way SLI] Gigabyte GA-X79-UD3 -- 4x PCI-E x16, 6x SATA 6Gb/s
Power Supply::800 Watt - Standard
Primary Hard Drive::1 TB HARD DRIVE -- 32M Cache, 7200 RPM, 6.0Gb/s - Single Drive
Data Hard Drive::None
Optical Drive::[12X Blu-Ray] LG BLU-RAY Reader, DVD±R/±RW Burner Combo Drive Black
2nd Optical Drive::None
Flash Media Reader / Writer::12-In-1 Internal Flash Media Card Reader/Writer - Black
Meter Display::None
USB Expansion::None
Sound Card::3D Premium Surround Sound Onboard
Network Card::Onboard LAN Network (Gb or 10/100)
Operating System::Microsoft Windows 7 Home Premium + Office Starter 2010 (Includes basic versions of Word and Excel) 64-Bit

This for me came to $1346.

This was my build 2:
Case::NZXT Guardian 921 RB Gaming Case Black w/ Red Light
Case Lighting::None
iBUYPOWER Labs - Noise Reduction::None
iBUYPOWER Labs - Internal Expansion::None
Processor::Intel® Core™ i7-2700K Processor (4x 3.50GHz/8MB L3 Cache)
iBUYPOWER PowerDrive:owerDrive Level 2 - Up to 20% Overclocking
Processor Cooling::Liquid CPU Cooling System [SOCKET-1155] - ARC Dual Silent High Performance Fan Upgrade (Push-Pull Airflow)
Memory::8 GB [4 GB X2] DDR3-1600 Memory Module - Corsair or Major Brand - FREE Upgrade to Corsair XMS3
Video Card::AMD Radeon HD 6790 - 1GB - CrossFire Mode (Dual Cards)
Video Card Brand::Major Brand Powered by AMD or NVIDIA
Free Stuff::
Motherboard::ASUS P8Z68-V LX -- Lucid Virtu Technology
Intel Smart Response Technology::None
Power Supply::800 Watt - Standard
Primary Hard Drive::1 TB HARD DRIVE -- 32M Cache, 7200 RPM, 6.0Gb/s - Single Drive
Data Hard Drive::None
Optical Drive::[12X Blu-Ray] LG BLU-RAY Reader, DVD±R/±RW Burner Combo Drive Black
2nd Optical Drive::None
Flash Media Reader / Writer::12-In-1 Internal Flash Media Card Reader/Writer - Black
Meter Display::None
USB Expansion::None
Sound Card::3D Premium Surround Sound Onboard
Network Card::Onboard LAN Network (Gb or 10/100)
Operating System::Microsoft Windows 7 Home Premium + Office Starter 2010 (Includes basic versions of Word and Excel) 64-Bit

This for me came up to $1317.

Please help.
Thanks.

 

[sonexpc]

For hardware specification I will choose system 1..

But if i'm a gamer I won't accept both Video Card...

and i cannot trust the power supply they use...

Just let you know performance of 6790 and 7770 both is lower than 6850

and you can get 6850 ~ $13x on newegg..

 

[Redbull25]

This was the spec on the standard 800w power supply.
Does this info help at all? And if so, is this a fairly descent or usable power supply?

Type ATX12V / EPS12V
Fans 1 x 140mm fan
PFC Passive
Crossfire Ready
SLI Certified
Modular Yes
Efficiency Up to 85%
Dimension (L x W x H) 7.8" x 6.3" x 3.3"
Connectors 1 x Main connector
1 x 12V (4+4pin)
8 x peripheral
6 x SATA
1 x Floppy
2 x PCI-E(6Pin)