GeForce GT 320 vs Radeon HD 6670 (OEM) 1GB

Intro

Compare those specifications to the Radeon HD 6670 (OEM) 1GB, which features a clock frequency of 800 MHz and a GDDR5 memory speed of 1000 MHz. It also features a 128-bit memory bus, and uses a 40 nm design. It is comprised of 480 SPUs, 24 TAUs, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320		43 Watts
Radeon HD 6670 (OEM) 1GB		63 Watts
	Difference: 20 Watts (47%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 6670 (OEM) 1GB is 153% quicker than the GeForce GT 320 overall, because of its higher data rate. (explain)

Radeon HD 6670 (OEM) 1GB		64000 MB/sec
GeForce GT 320		25280 MB/sec
	Difference: 38720 (153%)

Texel Rate

The Radeon HD 6670 (OEM) 1GB should be much (more or less 48%) better at AF than the GeForce GT 320. (explain)

Radeon HD 6670 (OEM) 1GB		19200 Mtexels/sec
GeForce GT 320		12960 Mtexels/sec
	Difference: 6240 (48%)

Pixel Rate

The Radeon HD 6670 (OEM) 1GB should be much (about 48%) faster with regards to full screen anti-aliasing than the GeForce GT 320, and also will be able to handle higher screen resolutions while still performing well. (explain)

Radeon HD 6670 (OEM) 1GB		6400 Mpixels/sec
GeForce GT 320		4320 Mpixels/sec
	Difference: 2080 (48%)

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: Bandwidth is the maximum amount of information (counted in megabytes per second) that can be transferred past the external memory interface in one second. It's calculated by multiplying the interface width by the speed of its memory. If it uses DDR type memory, the result should 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 higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.