GeForce GTX 460 vs Radeon HD 3650 256MB

Intro

Compare all that to the Radeon HD 3650 256MB, which features core clock speeds of 725 MHz on the GPU, and 800 MHz on the 256 MB of DDR2 memory. It features 120(24x5) SPUs along with 8 Texture Address Units and 4 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 3650 256MB		78 Watts
GeForce GTX 460		150 Watts
	Difference: 72 Watts (92%)

Memory Bandwidth

In theory, the GeForce GTX 460 should be 238% faster than the Radeon HD 3650 256MB overall, because of its higher data rate. (explain)

GeForce GTX 460		86400 MB/sec
Radeon HD 3650 256MB		25600 MB/sec
	Difference: 60800 (238%)

Texel Rate

The GeForce GTX 460 is much (more or less 552%) better at texture filtering than the Radeon HD 3650 256MB. (explain)

GeForce GTX 460		37800 Mtexels/sec
Radeon HD 3650 256MB		5800 Mtexels/sec
	Difference: 32000 (552%)

Pixel Rate

The GeForce GTX 460 will be a lot (approximately 459%) faster with regards to FSAA than the Radeon HD 3650 256MB, and also capable of handling higher resolutions more effectively. (explain)

GeForce GTX 460		16200 Mpixels/sec
Radeon HD 3650 256MB		2900 Mpixels/sec
	Difference: 13300 (459%)

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 (in units of MB per second) that can be transferred across the external memory interface in one second. It is calculated by multiplying the card's interface width by the speed of its memory. In the case of DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's 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 are applied per second. This figure is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.