Radeon HD 6570 (OEM) 2GB vs Radeon R9 M270X

Intro

Compare those specifications to the Radeon R9 M270X, which has core clock speeds of 725 MHz on the GPU, and 1125 MHz on the 2048 MB of GDDR5 memory. It features 640 SPUs along with 40 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon R9 M270X, in theory, should perform a bit faster than the Radeon HD 6570 (OEM) 2GB in general. (explain)

Radeon R9 M270X		72000 MB/sec
Radeon HD 6570 (OEM) 2GB		64000 MB/sec
	Difference: 8000 (13%)

Texel Rate

The Radeon R9 M270X should be much (approximately 86%) faster with regards to anisotropic filtering than the Radeon HD 6570 (OEM) 2GB. (explain)

Radeon R9 M270X		29000 Mtexels/sec
Radeon HD 6570 (OEM) 2GB		15600 Mtexels/sec
	Difference: 13400 (86%)

Pixel Rate

The Radeon R9 M270X should be much (about 123%) faster with regards to FSAA than the Radeon HD 6570 (OEM) 2GB, and also should be able to handle higher screen resolutions better. (explain)

Radeon R9 M270X		11600 Mpixels/sec
Radeon HD 6570 (OEM) 2GB		5200 Mpixels/sec
	Difference: 6400 (123%)

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 max amount of information (measured in megabytes per second) that can be transferred across the external memory interface in one second. The number is calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This is worked out 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 processed in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.