Radeon HD 4670 1GB vs Radeon R9 270X

Intro

Compare those specs to the Radeon R9 270X, which comes with clock speeds of 1000 MHz on the GPU, and 1400 MHz on the 2048 MB of GDDR5 RAM. 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 1GB		70 Watts
Radeon R9 270X		180 Watts
	Difference: 110 Watts (157%)

Memory Bandwidth

As far as performance goes, the Radeon R9 270X should theoretically be a lot better than the Radeon HD 4670 1GB in general. (explain)

Radeon R9 270X		179200 MB/sec
Radeon HD 4670 1GB		35200 MB/sec
	Difference: 144000 (409%)

Texel Rate

The Radeon R9 270X is quite a bit (about 233%) faster with regards to AF than the Radeon HD 4670 1GB. (explain)

Radeon R9 270X		80000 Mtexels/sec
Radeon HD 4670 1GB		24000 Mtexels/sec
	Difference: 56000 (233%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon R9 270X is superior to the Radeon HD 4670 1GB, by a large margin. (explain)

Radeon R9 270X		32000 Mpixels/sec
Radeon HD 4670 1GB		6000 Mpixels/sec
	Difference: 26000 (433%)

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 information (measured in megabytes per second) that can be transported past the external memory interface in a second. The number is calculated by multiplying the bus width by the speed of its memory. If it uses DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster 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 texture map elements (texels) that can be processed per second. This is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The higher this number, the better the video 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 chip could possibly write to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.