GeForce GT 340 1GB vs Radeon HD 6670 (OEM) 1GB

Intro

Compare those specs to the Radeon HD 6670 (OEM) 1GB, which features GPU core speed of 800 MHz, and 1024 MB of GDDR5 memory set to run at 1000 MHz through a 128-bit bus. It also features 480 Stream Processors, 24 Texture Address Units, and 8 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6670 (OEM) 1GB		63 Watts
GeForce GT 340 1GB		69 Watts
	Difference: 6 Watts (10%)

Memory Bandwidth

Theoretically, the Radeon HD 6670 (OEM) 1GB should be a small bit faster than the GeForce GT 340 1GB in general. (explain)

Radeon HD 6670 (OEM) 1GB		64000 MB/sec
GeForce GT 340 1GB		54400 MB/sec
	Difference: 9600 (18%)

Texel Rate

The Radeon HD 6670 (OEM) 1GB is a small bit (more or less 9%) more effective at anisotropic filtering than the GeForce GT 340 1GB. (explain)

Radeon HD 6670 (OEM) 1GB		19200 Mtexels/sec
GeForce GT 340 1GB		17600 Mtexels/sec
	Difference: 1600 (9%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon HD 6670 (OEM) 1GB is the winner, and very much so. (explain)

Radeon HD 6670 (OEM) 1GB		6400 Mpixels/sec
GeForce GT 340 1GB		4400 Mpixels/sec
	Difference: 2000 (45%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the largest amount of information (in units of MB per second) that can be transferred across the external memory interface in a second. The number is worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total texture units by the core speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.