Radeon HD 3650 256MB vs Radeon R7 240

Intro

Compare all of that 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 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 is 13% quicker than the Radeon HD 3650 256MB in general, because of its higher data rate. (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%) better at anisotropic filtering 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 a high screen resolution is important to you, then the Radeon R7 240 is superior to the Radeon HD 3650 256MB, and very much so. (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: Memory bandwidth is the max amount of information (measured in megabytes per second) that can be transferred over the external memory interface in a second. It is calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster 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 number of texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total texture units 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 in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.