Radeon HD 4650 1GB vs Radeon R7 M260

Intro

Compare all that to the Radeon R7 M260, which comes with clock speeds of 715 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

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon HD 4650 1GB should be 40% faster than the Radeon R7 M260 overall, because of its higher data rate. (explain)

Radeon HD 4650 1GB		22400 MB/sec
Radeon R7 M260		16000 MB/sec
	Difference: 6400 (40%)

Texel Rate

The Radeon HD 4650 1GB should be a bit (approximately 12%) faster with regards to anisotropic filtering than the Radeon R7 M260. (explain)

Radeon HD 4650 1GB		19200 Mtexels/sec
Radeon R7 M260		17160 Mtexels/sec
	Difference: 2040 (12%)

Pixel Rate

The Radeon R7 M260 is a bit (more or less 19%) better at full screen anti-aliasing than the Radeon HD 4650 1GB, and also able to handle higher resolutions without slowing down too much. (explain)

Radeon R7 M260		5720 Mpixels/sec
Radeon HD 4650 1GB		4800 Mpixels/sec
	Difference: 920 (19%)

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 data (counted in MB per second) that can be transported past the external memory interface in a second. It's calculated by multiplying the bus width by the speed of its memory. If the card has DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's 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 amount of texture map elements (texels) that can be processed per second. This number is calculated by multiplying the total amount of texture units 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 in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. The number 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 drawing the pixels (image) on the screen. The actual pixel output 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 potential to reach the maximum fill rate.