Radeon HD 3650 512MB vs Radeon R9 M265X

Intro

Compare all of that to the Radeon R9 M265X, which features a GPU core clock speed of 575 MHz, and 2048 MB of GDDR5 memory set to run at 1125 MHz through a 128-bit bus. It also is made up of 640 Stream Processors, 40 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the Radeon R9 M265X should perform quite a bit faster than the Radeon HD 3650 512MB overall. (explain)

Radeon R9 M265X		72000 MB/sec
Radeon HD 3650 512MB		25600 MB/sec
	Difference: 46400 (181%)

Texel Rate

The Radeon R9 M265X should be quite a bit (more or less 297%) faster with regards to anisotropic filtering than the Radeon HD 3650 512MB. (explain)

Radeon R9 M265X		23000 Mtexels/sec
Radeon HD 3650 512MB		5800 Mtexels/sec
	Difference: 17200 (297%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon R9 M265X is superior to the Radeon HD 3650 512MB, and very much so. (explain)

Radeon R9 M265X		9200 Mpixels/sec
Radeon HD 3650 512MB		2900 Mpixels/sec
	Difference: 6300 (217%)

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 one second. The number is worked out 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 bandwidth is, 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 applied in one second. This figure is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.