Radeon HD 3650 512MB vs Radeon R7 250

Intro

Compare those specs to the Radeon R7 250, which comes with a clock speed of 1000 MHz and a GDDR5 memory speed of 1150 MHz. It also makes use of a 128-bit bus, and uses a 28 nm design. It features 384 SPUs, 24 TAUs, and 8 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250		65 Watts
Radeon HD 3650 512MB		78 Watts
	Difference: 13 Watts (20%)

Memory Bandwidth

Theoretically, the Radeon R7 250 should perform quite a bit faster than the Radeon HD 3650 512MB in general. (explain)

Radeon R7 250		73600 MB/sec
Radeon HD 3650 512MB		25600 MB/sec
	Difference: 48000 (188%)

Texel Rate

The Radeon R7 250 is much (approximately 314%) faster with regards to anisotropic filtering than the Radeon HD 3650 512MB. (explain)

Radeon R7 250		24000 Mtexels/sec
Radeon HD 3650 512MB		5800 Mtexels/sec
	Difference: 18200 (314%)

Pixel Rate

The Radeon R7 250 is much (more or less 176%) faster with regards to full screen anti-aliasing than the Radeon HD 3650 512MB, and also capable of handling higher resolutions more effectively. (explain)

Radeon R7 250		8000 Mpixels/sec
Radeon HD 3650 512MB		2900 Mpixels/sec
	Difference: 5100 (176%)

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 (measured in megabytes per second) that can be transferred across the external memory interface in one second. It's calculated by multiplying the interface width by the speed of its memory. In the case of DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on quite a few 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.