Radeon HD 4670 512MB vs Radeon R9 270

Intro

Compare all of that to the Radeon R9 270, which has clock speeds of 900 MHz on the GPU, and 1400 MHz on the 2048 MB of GDDR5 memory. It features 1280 SPUs as well as 80 TAUs and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4670 512MB		70 Watts
Radeon R9 270		150 Watts
	Difference: 80 Watts (114%)

Memory Bandwidth

As far as performance goes, the Radeon R9 270 should in theory be a lot superior to the Radeon HD 4670 512MB overall. (explain)

Radeon R9 270		179200 MB/sec
Radeon HD 4670 512MB		32000 MB/sec
	Difference: 147200 (460%)

Texel Rate

The Radeon R9 270 is quite a bit (more or less 200%) more effective at AF than the Radeon HD 4670 512MB. (explain)

Radeon R9 270		72000 Mtexels/sec
Radeon HD 4670 512MB		24000 Mtexels/sec
	Difference: 48000 (200%)

Pixel Rate

The Radeon R9 270 should be much (more or less 380%) better at full screen anti-aliasing than the Radeon HD 4670 512MB, and also should be able to handle higher screen resolutions better. (explain)

Radeon R9 270		28800 Mpixels/sec
Radeon HD 4670 512MB		6000 Mpixels/sec
	Difference: 22800 (380%)

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 (measured in megabytes per second) that can be transported over the external memory interface within a second. It's calculated by multiplying the interface width by its memory speed. In the case of DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of 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 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 in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.