Radeon HD 4670 512MB vs Radeon R9 270X

Intro

Compare all of that to the Radeon R9 270X, which has GPU clock speed of 1000 MHz, and 2048 MB of GDDR5 memory running at 1400 MHz through a 256-bit bus. It also features 1280 SPUs, 80 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4670 512MB		70 Watts
Radeon R9 270X		180 Watts
	Difference: 110 Watts (157%)

Memory Bandwidth

In theory, the Radeon R9 270X should perform much faster than the Radeon HD 4670 512MB overall. (explain)

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

Texel Rate

The Radeon R9 270X should be a lot (about 233%) faster with regards to AF than the Radeon HD 4670 512MB. (explain)

Radeon R9 270X		80000 Mtexels/sec
Radeon HD 4670 512MB		24000 Mtexels/sec
	Difference: 56000 (233%)

Pixel Rate

The Radeon R9 270X is quite a bit (about 433%) more effective at AA than the Radeon HD 4670 512MB, and will be capable of handling higher resolutions while still performing well. (explain)

Radeon R9 270X		32000 Mpixels/sec
Radeon HD 4670 512MB		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 maximum amount of information (counted in MB per second) that can be transferred across the external memory interface in a second. It's calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.