Radeon HD 4670 1GB vs Radeon R7 240

Intro

Compare those specifications to the Radeon R7 240, which comes with a clock speed of 730 MHz and a DDR3 memory speed of 900 MHz. It also uses a 128-bit bus, and uses a 28 nm design. It features 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 4670 1GB		70 Watts
	Difference: 40 Watts (133%)

Memory Bandwidth

The Radeon HD 4670 1GB should theoretically perform a lot faster than the Radeon R7 240 in general. (explain)

Radeon HD 4670 1GB		35200 MB/sec
Radeon R7 240		28800 MB/sec
	Difference: 6400 (22%)

Texel Rate

The Radeon HD 4670 1GB is much (more or less 64%) more effective at texture filtering than the Radeon R7 240. (explain)

Radeon HD 4670 1GB		24000 Mtexels/sec
Radeon R7 240		14600 Mtexels/sec
	Difference: 9400 (64%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 4670 1GB is superior to the Radeon R7 240, though only just barely. (explain)

Radeon HD 4670 1GB		6000 Mpixels/sec
Radeon R7 240		5840 Mpixels/sec
	Difference: 160 (3%)

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 (counted in megabytes per second) that can be moved across the external memory interface in a second. The number is worked out by multiplying the bus width by its memory clock speed. If the card has DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This figure is calculated by multiplying the total 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 in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.