Radeon HD 3650 256MB vs Radeon R9 M270X

Intro

Compare all that to the Radeon R9 M270X, which comes with core clock speeds of 725 MHz on the GPU, and 1125 MHz on the 2048 MB of GDDR5 memory. It features 640 SPUs along with 40 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon R9 M270X should theoretically be much faster than the Radeon HD 3650 256MB in general. (explain)

Radeon R9 M270X		72000 MB/sec
Radeon HD 3650 256MB		25600 MB/sec
	Difference: 46400 (181%)

Texel Rate

The Radeon R9 M270X should be a lot (approximately 400%) better at anisotropic filtering than the Radeon HD 3650 256MB. (explain)

Radeon R9 M270X		29000 Mtexels/sec
Radeon HD 3650 256MB		5800 Mtexels/sec
	Difference: 23200 (400%)

Pixel Rate

The Radeon R9 M270X is quite a bit (approximately 300%) more effective at AA than the Radeon HD 3650 256MB, and also will be capable of handling higher screen resolutions while still performing well. (explain)

Radeon R9 M270X		11600 Mpixels/sec
Radeon HD 3650 256MB		2900 Mpixels/sec
	Difference: 8700 (300%)

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 (counted in megabytes per second) that can be moved past the external memory interface in a second. It is calculated by multiplying the interface width by its memory clock speed. In the case of DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the clock 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 rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.