Radeon HD 3650 256MB vs Radeon R9 270X

Intro

Compare all that to the Radeon R9 270X, which features a GPU core clock speed of 1000 MHz, and 2048 MB of GDDR5 memory running at 1400 MHz through a 256-bit bus. It also is made up of 1280 SPUs, 80 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 3650 256MB		78 Watts
Radeon R9 270X		180 Watts
	Difference: 102 Watts (131%)

Memory Bandwidth

Theoretically, the Radeon R9 270X should perform much faster than the Radeon HD 3650 256MB overall. (explain)

Radeon R9 270X		179200 MB/sec
Radeon HD 3650 256MB		25600 MB/sec
	Difference: 153600 (600%)

Texel Rate

The Radeon R9 270X should be much (approximately 1279%) more effective at AF than the Radeon HD 3650 256MB. (explain)

Radeon R9 270X		80000 Mtexels/sec
Radeon HD 3650 256MB		5800 Mtexels/sec
	Difference: 74200 (1279%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon R9 270X is a better choice, by far. (explain)

Radeon R9 270X		32000 Mpixels/sec
Radeon HD 3650 256MB		2900 Mpixels/sec
	Difference: 29100 (1003%)

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 largest amount of information (measured in MB per second) that can be transferred across the external memory interface in a second. It's worked out by multiplying the card's interface width by the speed of its memory. In the case of DDR memory, it should be multiplied by 2 once 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, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, the better the video card will be at 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 the video card can possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.