Radeon HD 5770 vs Radeon R7 240

Intro

Compare those specs to the Radeon R7 240, which features core clock speeds of 730 MHz on the GPU, and 900 MHz on the 2048 MB of DDR3 memory. It features 320 SPUs along with 20 Texture Address Units and 8 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 240		30 Watts
Radeon HD 5770		108 Watts
	Difference: 78 Watts (260%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 5770 should perform much faster than the Radeon R7 240 overall. (explain)

Radeon HD 5770		76800 MB/sec
Radeon R7 240		28800 MB/sec
	Difference: 48000 (167%)

Texel Rate

The Radeon HD 5770 should be much (more or less 133%) faster with regards to texture filtering than the Radeon R7 240. (explain)

Radeon HD 5770		34000 Mtexels/sec
Radeon R7 240		14600 Mtexels/sec
	Difference: 19400 (133%)

Pixel Rate

The Radeon HD 5770 will be quite a bit (approximately 133%) faster with regards to AA than the Radeon R7 240, and will be able to handle higher resolutions more effectively. (explain)

Radeon HD 5770		13600 Mpixels/sec
Radeon R7 240		5840 Mpixels/sec
	Difference: 7760 (133%)

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 max amount of data (in units of MB per second) that can be transferred over the external memory interface in one second. The number is worked out by multiplying the card's bus width by its memory speed. In the case of DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, 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 number of texture map elements (texels) that are processed in one second. This is worked out by multiplying the total number of 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 per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka 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, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.