Radeon HD 6770 vs Radeon R7 240

Intro

Compare those specifications to the Radeon R7 240, which comes with a GPU core clock speed of 730 MHz, and 2048 MB of DDR3 memory running at 900 MHz through a 128-bit bus. It also is comprised of 320 SPUs, 20 Texture Address Units, and 8 ROPs.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon HD 6770		1520 points
Radeon R7 240		1218 points
	Difference: 302 (25%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

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

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

Texel Rate

The Radeon HD 6770 is much (about 147%) faster with regards to texture filtering than the Radeon R7 240. (explain)

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

Pixel Rate

The Radeon HD 6770 should be much (about 147%) better at AA than the Radeon R7 240, and should be capable of handling higher screen resolutions while still performing well. (explain)

Radeon HD 6770		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: Memory bandwidth is the max amount of information (in units of megabytes per second) that can be transferred across the external memory interface in a second. It's worked out by multiplying the interface width by the speed of its memory. If it uses DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.