Radeon HD 4670 512MB vs Radeon R7 240

Intro

Compare that to the Radeon R7 240, which has GPU core 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 Stream Processors, 20 TAUs, and 8 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 240		30 Watts
Radeon HD 4670 512MB		70 Watts
	Difference: 40 Watts (133%)

Memory Bandwidth

In theory, the Radeon HD 4670 512MB should be a bit faster than the Radeon R7 240 in general. (explain)

Radeon HD 4670 512MB		32000 MB/sec
Radeon R7 240		28800 MB/sec
	Difference: 3200 (11%)

Texel Rate

The Radeon HD 4670 512MB is quite a bit (more or less 64%) better at AF than the Radeon R7 240. (explain)

Radeon HD 4670 512MB		24000 Mtexels/sec
Radeon R7 240		14600 Mtexels/sec
	Difference: 9400 (64%)

Pixel Rate

The Radeon HD 4670 512MB should be a bit (more or less 3%) more effective at anti-aliasing than the Radeon R7 240, and also capable of handling higher screen resolutions more effectively. (explain)

Radeon HD 4670 512MB		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 maximum amount of information (counted in megabytes per second) that can be transported across the external memory interface in a second. It is calculated by multiplying the bus width by the speed of its memory. If it uses DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This figure is worked out by multiplying the total texture units by the core speed of the chip. The better 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 most pixels the video card can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.