GeForce 9400 GT 256MB vs Radeon HD 6670 (OEM) 1GB

Intro

Compare all of that to the Radeon HD 6670 (OEM) 1GB, which features clock speeds of 800 MHz on the GPU, and 1000 MHz on the 1024 MB of GDDR5 memory. It features 480 SPUs as well as 24 TAUs and 8 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9400 GT 256MB		50 Watts
Radeon HD 6670 (OEM) 1GB		63 Watts
	Difference: 13 Watts (26%)

Memory Bandwidth

Performance-wise, the Radeon HD 6670 (OEM) 1GB should in theory be a lot better than the GeForce 9400 GT 256MB overall. (explain)

Radeon HD 6670 (OEM) 1GB		64000 MB/sec
GeForce 9400 GT 256MB		12800 MB/sec
	Difference: 51200 (400%)

Texel Rate

The Radeon HD 6670 (OEM) 1GB should be quite a bit (approximately 336%) more effective at texture filtering than the GeForce 9400 GT 256MB. (explain)

Radeon HD 6670 (OEM) 1GB		19200 Mtexels/sec
GeForce 9400 GT 256MB		4400 Mtexels/sec
	Difference: 14800 (336%)

Pixel Rate

The Radeon HD 6670 (OEM) 1GB should be much (more or less 191%) better at full screen anti-aliasing than the GeForce 9400 GT 256MB, and also should be capable of handling higher screen resolutions while still performing well. (explain)

Radeon HD 6670 (OEM) 1GB		6400 Mpixels/sec
GeForce 9400 GT 256MB		2200 Mpixels/sec
	Difference: 4200 (191%)

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 data (counted in MB per second) that can be moved past the external memory interface within a second. It's worked out by multiplying the interface width by the speed of its memory. If it uses DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This figure is calculated by multiplying the total amount of texture units of the card 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 maximum amount of pixels that the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number 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 ability to get to the maximum fill rate.