GeForce GT 315 vs Radeon HD 3650 256MB

Intro

Compare those specifications to the Radeon HD 3650 256MB, which makes use of a 55 nm design. AMD has set the core frequency at 725 MHz. The DDR2 memory runs at a speed of 800 MHz on this particular card. It features 120(24x5) SPUs as well as 8 TAUs and 4 Rasterization Operator Units.

Display Graphs

Hide Graphs

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 is 1% faster than the GeForce GT 315 overall, due to its greater bandwidth. (explain)

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

Texel Rate

The GeForce GT 315 is much (about 72%) more effective at texture 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

The GeForce GT 315 should be quite a bit (approximately 72%) faster with regards to anti-aliasing than the Radeon HD 3650 256MB, and capable of handling higher screen resolutions more effectively. (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: Bandwidth is the largest amount of data (counted in megabytes per second) that can be transported over the external memory interface in one second. The number is calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR memory, the result should be multiplied by 2 once 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 number of texture map elements (texels) that are applied per second. This figure is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per 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. Pixel rate is calculated by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.