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

Intro

Compare all of that to the Radeon HD 6670 (OEM), which has clock speeds of 800 MHz on the GPU, and 1000 MHz on the 512 MB of GDDR5 RAM. It features 480 SPUs along with 24 TAUs and 8 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

Theoretically, the Radeon HD 6670 (OEM) should be a lot faster than the GeForce 9400 GT 256MB overall. (explain)

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

Texel Rate

The Radeon HD 6670 (OEM) will be much (approximately 336%) better at AF than the GeForce 9400 GT 256MB. (explain)

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

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 6670 (OEM) is a better choice, by a large margin. (explain)

Radeon HD 6670 (OEM)		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: Bandwidth is the max amount of data (measured in MB per second) that can be moved past the external memory interface in a second. It's worked out by multiplying the bus width by the speed of its memory. In the case of DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.