Radeon HD 6770 1GB vs Radeon R7 240

Intro

Compare all that to the Radeon R7 240, which uses a 28 nm design. AMD has set the core speed at 730 MHz. The DDR3 memory runs at a speed of 900 MHz on this card. It features 320 SPUs along with 20 Texture Address Units and 8 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 240		30 Watts
Radeon HD 6770 1GB		108 Watts
	Difference: 78 Watts (260%)

Memory Bandwidth

In theory, the Radeon HD 6770 1GB should perform much faster than the Radeon R7 240 overall. (explain)

Radeon HD 6770 1GB		67200 MB/sec
Radeon R7 240		28800 MB/sec
	Difference: 38400 (133%)

Texel Rate

The Radeon HD 6770 1GB should be a lot (more or less 147%) faster with regards to texture filtering than the Radeon R7 240. (explain)

Radeon HD 6770 1GB		36000 Mtexels/sec
Radeon R7 240		14600 Mtexels/sec
	Difference: 21400 (147%)

Pixel Rate

The Radeon HD 6770 1GB is much (about 147%) better at full screen anti-aliasing than the Radeon R7 240, and also will be able to handle higher screen resolutions without losing too much performance. (explain)

Radeon HD 6770 1GB		14400 Mpixels/sec
Radeon R7 240		5840 Mpixels/sec
	Difference: 8560 (147%)

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 data (counted in megabytes per second) that can be transported past the external memory interface in a second. It's calculated by multiplying the card's interface width by its memory speed. If the card has DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, 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 number is calculated by multiplying the total texture units by the core speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the the card's 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 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 maximum fill rate.