Radeon HD 4670 512MB vs Radeon R7 240

Intro

Compare those specs to the Radeon R7 240, which makes use of a 28 nm design. AMD has clocked the core frequency at 730 MHz. The DDR3 RAM works at a frequency of 900 MHz on this specific card. It features 320 SPUs as well as 20 TAUs 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 4670 512MB		70 Watts
	Difference: 40 Watts (133%)

Memory Bandwidth

As far as performance goes, the Radeon HD 4670 512MB should theoretically be a little bit better than the Radeon R7 240 overall. (explain)

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

Texel Rate

The Radeon HD 4670 512MB should be quite a bit (approximately 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 is a small bit (approximately 3%) faster with regards to AA than the Radeon R7 240, and also will be able to handle higher screen resolutions while still performing well. (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: Bandwidth is the maximum amount of data (measured in megabytes per second) that can be moved over the external memory interface within a second. It's worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, 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 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 card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number 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 rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.