GeForce GT 240 GDDR5 1GB vs Radeon HD 3650 256MB

Intro

Compare that to the Radeon HD 3650 256MB, which features a clock frequency of 725 MHz and a DDR2 memory frequency of 800 MHz. It also features a 128-bit memory bus, and makes use of a 55 nm design. It is made up of 120(24x5) SPUs, 8 Texture Address Units, and 4 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 240 GDDR5 1GB		70 Watts
Radeon HD 3650 256MB		78 Watts
	Difference: 8 Watts (11%)

Memory Bandwidth

In theory, the GeForce GT 240 GDDR5 1GB should be quite a bit faster than the Radeon HD 3650 256MB in general. (explain)

GeForce GT 240 GDDR5 1GB		54400 MB/sec
Radeon HD 3650 256MB		25600 MB/sec
	Difference: 28800 (113%)

Texel Rate

The GeForce GT 240 GDDR5 1GB should be a lot (more or less 203%) faster with regards to AF than the Radeon HD 3650 256MB. (explain)

GeForce GT 240 GDDR5 1GB		17600 Mtexels/sec
Radeon HD 3650 256MB		5800 Mtexels/sec
	Difference: 11800 (203%)

Pixel Rate

The GeForce GT 240 GDDR5 1GB is much (about 52%) more effective at FSAA than the Radeon HD 3650 256MB, and also should be capable of handling higher resolutions without slowing down too much. (explain)

GeForce GT 240 GDDR5 1GB		4400 Mpixels/sec
Radeon HD 3650 256MB		2900 Mpixels/sec
	Difference: 1500 (52%)

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 (in units of MB per second) that can be transferred over the external memory interface in a second. It's worked out by multiplying the bus width by its memory speed. In the case of DDR memory, it must be multiplied by 2 once again. If 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, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This is calculated by multiplying the total number of texture units by the core clock speed of the chip. The better the texel rate, the better the graphics 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 most pixels that the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.