Radeon HD 3650 vs Radeon R7 250X

Intro

Compare those specs to the Radeon R7 250X, which features a GPU core clock speed of 1000 MHz, and 1024 MB of GDDR5 RAM running at 1125 MHz through a 128-bit bus. It also is comprised of 640 Stream Processors, 40 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

In theory, the Radeon R7 250X should perform much faster than the Radeon HD 3650 in general. (explain)

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

Texel Rate

The Radeon R7 250X is much (about 590%) faster with regards to texture filtering than the Radeon HD 3650. (explain)

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

Pixel Rate

If running with a high resolution is important to you, then the Radeon R7 250X is a better choice, by a large margin. (explain)

Radeon R7 250X		16000 Mpixels/sec
Radeon HD 3650		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 (in units of megabytes 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 it uses DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, 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 texture map elements (texels) that are applied per second. This figure is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to its 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 core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.