Radeon HD 4850 2GB vs Radeon R7 240

Intro

Compare those specs to the Radeon R7 240, which makes use of a 28 nm design. AMD has set the core speed at 730 MHz. The DDR3 memory works at a frequency of 900 MHz on this model. It features 320 SPUs as well as 20 Texture Address Units 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 4850 2GB		110 Watts
	Difference: 80 Watts (267%)

Memory Bandwidth

In theory, the Radeon HD 4850 2GB should be 121% faster than the Radeon R7 240 overall, because of its greater data rate. (explain)

Radeon HD 4850 2GB		63552 MB/sec
Radeon R7 240		28800 MB/sec
	Difference: 34752 (121%)

Texel Rate

The Radeon HD 4850 2GB should be a lot (about 71%) better at AF than the Radeon R7 240. (explain)

Radeon HD 4850 2GB		25000 Mtexels/sec
Radeon R7 240		14600 Mtexels/sec
	Difference: 10400 (71%)

Pixel Rate

The Radeon HD 4850 2GB will be much (approximately 71%) better at anti-aliasing than the Radeon R7 240, and capable of handling higher resolutions while still performing well. (explain)

Radeon HD 4850 2GB		10000 Mpixels/sec
Radeon R7 240		5840 Mpixels/sec
	Difference: 4160 (71%)

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 transferred across the external memory interface within a second. It is worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.