Radeon HD 4770 vs Radeon R9 270X

Intro

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

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4770		80 Watts
Radeon R9 270X		180 Watts
	Difference: 100 Watts (125%)

Memory Bandwidth

Performance-wise, the Radeon R9 270X should in theory be a lot superior to the Radeon HD 4770 overall. (explain)

Radeon R9 270X		179200 MB/sec
Radeon HD 4770		51200 MB/sec
	Difference: 128000 (250%)

Texel Rate

The Radeon R9 270X will be a lot (about 233%) better at texture filtering than the Radeon HD 4770. (explain)

Radeon R9 270X		80000 Mtexels/sec
Radeon HD 4770		24000 Mtexels/sec
	Difference: 56000 (233%)

Pixel Rate

The Radeon R9 270X will be much (more or less 167%) faster with regards to anti-aliasing than the Radeon HD 4770, and capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon R9 270X		32000 Mpixels/sec
Radeon HD 4770		12000 Mpixels/sec
	Difference: 20000 (167%)

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 information (in units of MB per second) that can be transported past the external memory interface within a second. The number is calculated by multiplying the bus width by the speed of its memory. In the case of DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher 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 texture map elements (texels) that are applied per second. This is worked out by multiplying the total texture units by the core clock speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.