Radeon HD 3650 512MB vs Radeon R9 M270X

Intro

Compare those specifications to the Radeon R9 M270X, which uses a 28 nm design. AMD has clocked the core frequency at 725 MHz. The GDDR5 RAM works at a frequency of 1125 MHz on this specific card. It features 640 SPUs as well as 40 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon R9 M270X should be 181% faster than the Radeon HD 3650 512MB overall, due to its greater bandwidth. (explain)

Radeon R9 M270X		72000 MB/sec
Radeon HD 3650 512MB		25600 MB/sec
	Difference: 46400 (181%)

Texel Rate

The Radeon R9 M270X should be a lot (approximately 400%) more effective at texture filtering than the Radeon HD 3650 512MB. (explain)

Radeon R9 M270X		29000 Mtexels/sec
Radeon HD 3650 512MB		5800 Mtexels/sec
	Difference: 23200 (400%)

Pixel Rate

The Radeon R9 M270X is much (about 300%) better at anti-aliasing than the Radeon HD 3650 512MB, and also should be able to handle higher screen resolutions without slowing down too much. (explain)

Radeon R9 M270X		11600 Mpixels/sec
Radeon HD 3650 512MB		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 (in units of megabytes per second) that can be moved across the external memory interface in a second. It is worked out by multiplying the bus width by its memory speed. In the case of DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

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