GeForce GT 315 vs Radeon HD 3650

Intro

Compare all that to the Radeon HD 3650, which has core speeds of 725 MHz on the GPU, and 800 MHz on the 1024 MB of GDDR4 RAM. It features 120(24x5) SPUs along with 8 Texture Address Units 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		78 Watts
	Difference: 26 Watts (50%)

Memory Bandwidth

In theory, the Radeon HD 3650 is 1% quicker than the GeForce GT 315 in general, due to its higher bandwidth. (explain)

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

Texel Rate

The GeForce GT 315 will be quite a bit (about 72%) more effective at AF than the Radeon HD 3650. (explain)

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

Pixel Rate

The GeForce GT 315 is quite a bit (about 72%) faster with regards to full screen anti-aliasing than the Radeon HD 3650, and capable of handling higher screen resolutions while still performing well. (explain)

GeForce GT 315		5000 Mpixels/sec
Radeon HD 3650		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 max amount of information (measured in MB per second) that can be transported past the external memory interface in one second. It is worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the 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 texture map elements (texels) that can be processed in one second. This is calculated by multiplying the total number of texture units by the core speed of the chip. The higher the texel rate, the better the graphics card will be at 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 chip can possibly record to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.