Radeon HD 3650 512MB vs Radeon R7 250X 2GB

Intro

Compare all that to the Radeon R7 250X 2GB, which features core speeds of 1000 MHz on the GPU, and 1125 MHz on the 2048 MB of GDDR5 RAM. It features 640 SPUs as well as 40 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 3650 512MB		78 Watts
Radeon R7 250X 2GB		95 Watts
	Difference: 17 Watts (22%)

Memory Bandwidth

In theory, the Radeon R7 250X 2GB should be 181% faster than the Radeon HD 3650 512MB overall, because of its higher data rate. (explain)

Radeon R7 250X 2GB		72000 MB/sec
Radeon HD 3650 512MB		25600 MB/sec
	Difference: 46400 (181%)

Texel Rate

The Radeon R7 250X 2GB is quite a bit (about 590%) better at anisotropic filtering than the Radeon HD 3650 512MB. (explain)

Radeon R7 250X 2GB		40000 Mtexels/sec
Radeon HD 3650 512MB		5800 Mtexels/sec
	Difference: 34200 (590%)

Pixel Rate

The Radeon R7 250X 2GB should be much (about 452%) faster with regards to FSAA than the Radeon HD 3650 512MB, and also able to handle higher resolutions better. (explain)

Radeon R7 250X 2GB		16000 Mpixels/sec
Radeon HD 3650 512MB		2900 Mpixels/sec
	Difference: 13100 (452%)

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 maximum amount of information (counted in MB per second) that can be transported over the external memory interface in a second. It is calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.