Radeon HD 4770 vs Radeon R7 M260X

Intro

Compare those specs to the Radeon R7 M260X, which makes use of a 28 nm design. AMD has clocked the core frequency at 825 MHz. The GDDR5 memory works at a speed of 1000 MHz on this model. 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

In theory, the Radeon R7 M260X will be 25% faster than the Radeon HD 4770 in general, because of its higher bandwidth. (explain)

Radeon R7 M260X		64000 MB/sec
Radeon HD 4770		51200 MB/sec
	Difference: 12800 (25%)

Texel Rate

The Radeon HD 4770 should be much (more or less 21%) more effective at anisotropic filtering than the Radeon R7 M260X. (explain)

Radeon HD 4770		24000 Mtexels/sec
Radeon R7 M260X		19800 Mtexels/sec
	Difference: 4200 (21%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 4770 is a better choice, by a large margin. (explain)

Radeon HD 4770		12000 Mpixels/sec
Radeon R7 M260X		6600 Mpixels/sec
	Difference: 5400 (82%)

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 maximum amount of information (in units of megabytes per second) that can be transferred over the external memory interface in one second. It's worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This number is worked out by multiplying the total number of texture units by the core speed of the chip. The better this number, the better the video 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 record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. 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 output rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.