Radeon HD 6770 1GB vs Radeon R7 240

Intro

Compare that to the Radeon R7 240, which features a clock speed of 730 MHz and a DDR3 memory frequency of 900 MHz. It also features a 128-bit bus, and uses a 28 nm design. It is made up of 320 SPUs, 20 Texture Address Units, and 8 Raster Operation 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 in general. (explain)

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

Texel Rate

The Radeon HD 6770 1GB will be quite a bit (approximately 147%) faster with regards to anisotropic 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 should be quite a bit (about 147%) faster with regards to anti-aliasing than the Radeon R7 240, and will be able to handle higher resolutions better. (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: Memory bandwidth is the maximum amount of data (in units of MB per second) that can be transported over the external memory interface in a second. It's calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the 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 worked out by multiplying the total texture units by the core speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs 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 output rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.