Radeon HD 3650 256MB vs Radeon R7 240

Intro

Compare all of that to the Radeon R7 240, which uses a 28 nm design. AMD has clocked 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 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 3650 256MB		78 Watts
	Difference: 48 Watts (160%)

Memory Bandwidth

Theoretically speaking, the Radeon R7 240 should be a bit faster than the Radeon HD 3650 256MB overall. (explain)

Radeon R7 240		28800 MB/sec
Radeon HD 3650 256MB		25600 MB/sec
	Difference: 3200 (13%)

Texel Rate

The Radeon R7 240 is a lot (more or less 152%) faster with regards to AF than the Radeon HD 3650 256MB. (explain)

Radeon R7 240		14600 Mtexels/sec
Radeon HD 3650 256MB		5800 Mtexels/sec
	Difference: 8800 (152%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon R7 240 is a better choice, by a large margin. (explain)

Radeon R7 240		5840 Mpixels/sec
Radeon HD 3650 256MB		2900 Mpixels/sec
	Difference: 2940 (101%)

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 largest amount of information (measured in megabytes per second) that can be transported past the external memory interface within a second. It's worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. 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 applied in one second. This is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The higher the texel rate, the better the graphics 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 maximum number of pixels the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.