GeForce GT 315 vs Radeon HD 3650 512MB

Intro

Compare that to the Radeon HD 3650 512MB, which has a GPU core clock speed of 725 MHz, and 512 MB of GDDR3 memory set to run at 800 MHz through a 128-bit bus. It also features 120(24x5) Stream Processors, 8 TAUs, and 4 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 315		52 Watts
Radeon HD 3650 512MB		78 Watts
	Difference: 26 Watts (50%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 3650 512MB is 1% faster than the GeForce GT 315 in general, due to its greater bandwidth. (explain)

Radeon HD 3650 512MB		25600 MB/sec
GeForce GT 315		25280 MB/sec
	Difference: 320 (1%)

Texel Rate

The GeForce GT 315 should be a lot (more or less 72%) faster with regards to texture filtering than the Radeon HD 3650 512MB. (explain)

GeForce GT 315		10000 Mtexels/sec
Radeon HD 3650 512MB		5800 Mtexels/sec
	Difference: 4200 (72%)

Pixel Rate

The GeForce GT 315 is much (more or less 72%) faster with regards to FSAA than the Radeon HD 3650 512MB, and also capable of handling higher resolutions better. (explain)

GeForce GT 315		5000 Mpixels/sec
Radeon HD 3650 512MB		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: Bandwidth is the maximum amount of information (in units of MB per second) that can be transferred past the external memory interface in a second. The number is calculated by multiplying the bus width by its memory clock speed. If the card has DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to its 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 the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.