Sapphire Radeon HD 5970 TOXIC 4GB VS Sapphire Radeon HD 5970 2GB benchmark

This is a comparative benchmark between the two Radeon HD 5970 TOXIC 4GB and Radeon HD 5970 2GB from Sapphire 

lets see the defirence in the specification and feature between these 2 cards:

Sapphire Radeon HD 5970 TOXIC 4GB

Specification:

Sapphire Radeon HD 5970 2GB

Features:
With twice the computing power of the highly acclaimed SAPPHIRE HD 5870, the new HD 5970 model shares all the exciting features of this family – including support for the DirectCompute 11 instruction set of Microsoft DirectX 11, hardware tessellation and multi threaded communication with the system CPU. It also supports the acceleration of applications supported by ATI Stream, and the ability to display across three monitors simultaneously with ATI Eyefinity.

Specification:

Model
Brand	SAPPHIRE
Model	100280OCSR
Interface
Interface	PCI Express 2.1 x16
Chipset
Chipset Manufacturer	ATI
GPU	Radeon HD 5970 (Hemlock)
Core Clock	735MHz
Stream Processors	3200 (1600 x 2) Stream Processing Units
Memory
Effective Memory Clock	1010MHz (4.04Gbps)
Memory Size	2GB
Memory Interface	512 (256 x 2)-bit
Memory Type	GDDR5
3D API
DirectX	DirectX 11
Ports
DisplayPort	1 x Mini DisplayPort
DVI	2 x DVI
General
RAMDAC	400 MHz
Max Resolution	2560 x 1600
CrossFireX Support	Yes
Cooler	With Fan
System Requirements	650 Watt or greater power supply one 75W 6-pin and one 150W 8-pin PCI Express power connectors recommended (850 Watt with two 75W 6-pin and two 150W 8-pin connectors for ATI CrossFireX technology in dual mode)
Power Connector	6 pin / 8 pin
Dual-Link DVI Supported	Yes
HDCP Ready	Yes
Features
Features	OverClock Edition
Packaging
Package Contents	Game Bundle: Dirt2 Coupon x 1 *The game Dirt2 is bundled in coupon. End user may download the game on-line by using the coupon when the game is officially released.

Far Cry performance benchmark test:

You can see that there's some serious power on offer from the HD 5970 TOXIC 4GB from Sapphire. There's no denying that the extra power would come more so from the extra MHz on the core and memory rather than the extra RAM, but in creating what they want which seems to be the ultimate graphics card, it's clearly a nice touch.