GeForce GTX 470 vs Radeon HD 4670 1GB

Intro

Compare all that to the Radeon HD 4670 1GB, which has core speeds of 750 MHz on the GPU, and 1100 MHz on the 1024 MB of GDDR4/GDDR3/DDR3/DDR2 RAM. It features 320(64x5) SPUs as well as 32 TAUs and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4670 1GB		70 Watts
GeForce GTX 470		215 Watts
	Difference: 145 Watts (207%)

Memory Bandwidth

Theoretically, the GeForce GTX 470 should perform a lot faster than the Radeon HD 4670 1GB overall. (explain)

GeForce GTX 470		133920 MB/sec
Radeon HD 4670 1GB		35200 MB/sec
	Difference: 98720 (280%)

Texel Rate

The GeForce GTX 470 is much (more or less 42%) more effective at texture filtering than the Radeon HD 4670 1GB. (explain)

GeForce GTX 470		33992 Mtexels/sec
Radeon HD 4670 1GB		24000 Mtexels/sec
	Difference: 9992 (42%)

Pixel Rate

The GeForce GTX 470 should be a lot (approximately 305%) better at anti-aliasing than the Radeon HD 4670 1GB, and will be capable of handling higher screen resolutions without slowing down too much. (explain)

GeForce GTX 470		24280 Mpixels/sec
Radeon HD 4670 1GB		6000 Mpixels/sec
	Difference: 18280 (305%)

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 data (measured in megabytes per second) that can be transported across the external memory interface in one second. The number is calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. 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 potential to reach the maximum fill rate.