GeForce GT 315 vs Radeon HD 3650 512MB

Intro

Compare those specs to the Radeon HD 3650 512MB, which comes with a clock frequency of 725 MHz and a GDDR3 memory speed of 800 MHz. It also uses a 128-bit bus, and uses a 55 nm design. It is made up of 120(24x5) SPUs, 8 TAUs, and 4 Raster Operation Units.

Display Graphs

Hide Graphs

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

In theory, the Radeon HD 3650 512MB should be a little bit faster than the GeForce GT 315 in general. (explain)

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

Texel Rate

The GeForce GT 315 is much (more or less 72%) better at anisotropic 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 should be much (approximately 72%) more effective at anti-aliasing than the Radeon HD 3650 512MB, and also able to handle higher screen resolutions more effectively. (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: Memory bandwidth is the maximum amount of data (counted in MB per second) that can be transported past the external memory interface within a second. It's worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.