Radeon HD 4850 1GB vs Radeon R7 240

Intro

Compare those specifications to the Radeon R7 240, which makes use of a 28 nm design. AMD has set the core frequency at 730 MHz. The DDR3 RAM runs at a speed of 900 MHz on this specific model. It features 320 SPUs as well as 20 TAUs and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 240		30 Watts
Radeon HD 4850 1GB		110 Watts
	Difference: 80 Watts (267%)

Memory Bandwidth

In theory, the Radeon HD 4850 1GB should perform a lot faster than the Radeon R7 240 overall. (explain)

Radeon HD 4850 1GB		63552 MB/sec
Radeon R7 240		28800 MB/sec
	Difference: 34752 (121%)

Texel Rate

The Radeon HD 4850 1GB is a lot (about 71%) more effective at anisotropic filtering than the Radeon R7 240. (explain)

Radeon HD 4850 1GB		25000 Mtexels/sec
Radeon R7 240		14600 Mtexels/sec
	Difference: 10400 (71%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 4850 1GB is superior to the Radeon R7 240, by a large margin. (explain)

Radeon HD 4850 1GB		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 largest amount of information (measured in megabytes per second) that can be moved across the external memory interface within a second. It is calculated by multiplying the bus width by its memory clock speed. If the card has DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video 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 - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.