GeForce GT 315 vs Radeon HD 3650 256MB

Intro

Compare those specs to the Radeon HD 3650 256MB, which comes with GPU clock speed of 725 MHz, and 256 MB of DDR2 memory running at 800 MHz through a 128-bit bus. It also is comprised of 120(24x5) Stream Processors, 8 Texture Address Units, and 4 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 315		52 Watts
Radeon HD 3650 256MB		78 Watts
	Difference: 26 Watts (50%)

Memory Bandwidth

In theory, the Radeon HD 3650 256MB should perform just a bit faster than the GeForce GT 315 in general. (explain)

Radeon HD 3650 256MB		25600 MB/sec
GeForce GT 315		25280 MB/sec
	Difference: 320 (1%)

Texel Rate

The GeForce GT 315 is quite a bit (more or less 72%) more effective at anisotropic filtering than the Radeon HD 3650 256MB. (explain)

GeForce GT 315		10000 Mtexels/sec
Radeon HD 3650 256MB		5800 Mtexels/sec
	Difference: 4200 (72%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce GT 315 is superior to the Radeon HD 3650 256MB, and very much so. (explain)

GeForce GT 315		5000 Mpixels/sec
Radeon HD 3650 256MB		2900 Mpixels/sec
	Difference: 2100 (72%)

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 megabytes per second) that can be transported across the external memory interface in a second. It's worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR type memory, it should be multiplied by 2 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 anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. 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 output rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.