Radeon HD 6570 (OEM) 2GB vs Radeon R7 M265

Intro

Compare those specifications to the Radeon R7 M265, which has clock speeds of 725 MHz on the GPU, and 1000 MHz on the 2048 MB of DDR3 memory. It features 384 SPUs along with 24 Texture Address Units and 8 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon HD 6570 (OEM) 2GB will be 100% quicker than the Radeon R7 M265 overall, because of its higher bandwidth. (explain)

Radeon HD 6570 (OEM) 2GB		64000 MB/sec
Radeon R7 M265		32000 MB/sec
	Difference: 32000 (100%)

Texel Rate

The Radeon R7 M265 should be just a bit (more or less 12%) more effective at AF than the Radeon HD 6570 (OEM) 2GB. (explain)

Radeon R7 M265		17400 Mtexels/sec
Radeon HD 6570 (OEM) 2GB		15600 Mtexels/sec
	Difference: 1800 (12%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon R7 M265 is superior to the Radeon HD 6570 (OEM) 2GB, though not by far. (explain)

Radeon R7 M265		5800 Mpixels/sec
Radeon HD 6570 (OEM) 2GB		5200 Mpixels/sec
	Difference: 600 (12%)

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 (counted in MB per second) that can be transported over the external memory interface in a second. It is calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, 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 in one second. This is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The better this number, 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 maximum amount of pixels that the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.