Radeon HD 4650 1GB vs Radeon R7 M260

Intro

Compare all that to the Radeon R7 M260, which comes with a core clock frequency of 715 MHz and a DDR3 memory speed of 1000 MHz. It also features a 64-bit bus, and makes use of a 28 nm design. It is made up of 384 SPUs, 24 TAUs, and 8 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon HD 4650 1GB should perform much faster than the Radeon R7 M260 in general. (explain)

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

Texel Rate

The Radeon HD 4650 1GB is a small bit (more or less 12%) better at AF 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 should be a small bit (about 19%) better at AA than the Radeon HD 4650 1GB, and should be able to handle higher resolutions more effectively. (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: Bandwidth is the largest amount of information (measured in megabytes per second) that can be transferred over the external memory interface within a second. It's calculated by multiplying the interface width by its memory clock speed. In the case of DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that 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 speed of the card. 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 is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.