Radeon HD 4850 2GB vs Radeon R7 240

Intro

Compare all of that to the Radeon R7 240, which has GPU core speed of 730 MHz, and 2048 MB of DDR3 RAM running at 900 MHz through a 128-bit bus. It also features 320 Stream Processors, 20 Texture Address Units, 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 2GB		110 Watts
	Difference: 80 Watts (267%)

Memory Bandwidth

As far as performance goes, the Radeon HD 4850 2GB should in theory be a lot better than the Radeon R7 240 in general. (explain)

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

Texel Rate

The Radeon HD 4850 2GB will be a lot (more or less 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 should be a lot (more or less 71%) faster with regards to full screen anti-aliasing than the Radeon R7 240, and also should be able to handle higher resolutions more effectively. (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: Bandwidth is the maximum amount of data (counted in MB per second) that can be transported past the external memory interface within a second. The number is calculated by multiplying the card's bus width by its memory speed. If the card has DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs 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 output rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.