Radeon HD 4730 vs Radeon R9 M270X

Intro

Compare that to the Radeon R9 M270X, which comes with a GPU core clock speed of 725 MHz, and 2048 MB of GDDR5 memory running at 1125 MHz through a 128-bit bus. It also features 640 Stream Processors, 40 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon R9 M270X will be 25% quicker than the Radeon HD 4730 in general, due to its higher bandwidth. (explain)

Radeon R9 M270X		72000 MB/sec
Radeon HD 4730		57600 MB/sec
	Difference: 14400 (25%)

Texel Rate

The Radeon R9 M270X will be a lot (more or less 29%) better at texture filtering than the Radeon HD 4730. (explain)

Radeon R9 M270X		29000 Mtexels/sec
Radeon HD 4730		22400 Mtexels/sec
	Difference: 6600 (29%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon R9 M270X is superior to the Radeon HD 4730, and very much so. (explain)

Radeon R9 M270X		11600 Mpixels/sec
Radeon HD 4730		5600 Mpixels/sec
	Difference: 6000 (107%)

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 data (counted in MB per second) that can be transferred past the external memory interface in a second. It's calculated by multiplying the card's bus width by its memory speed. If the card has DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This is worked out by multiplying the total texture units of the card by the core speed of the chip. The better this number, the better the video 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 most pixels the video card could possibly write to its local memory per second - measured in millions of pixels per second. The figure 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 is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.