Radeon HD 3650 256MB vs Radeon R9 270X

Intro

Compare those specs to the Radeon R9 270X, which features a clock speed of 1000 MHz and a GDDR5 memory speed of 1400 MHz. It also uses a 256-bit memory bus, and uses a 28 nm design. It is comprised of 1280 SPUs, 80 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

Hide Graphs

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

In theory, the Radeon R9 270X should be quite a bit faster than the Radeon HD 3650 256MB in general. (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 texture filtering 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 running with high levels of AA 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 maximum amount of data (measured in megabytes per second) that can be transferred across the external memory interface in one second. The number is worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This is worked out by multiplying the total texture units of the card 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 per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly record to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel 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 reach the maximum fill rate.