GeForce GT 320 vs Radeon HD 3650 256MB

Intro

Compare those specs to the Radeon HD 3650 256MB, which uses 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 specific model. It features 120(24x5) SPUs as well as 8 TAUs and 4 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320		43 Watts
Radeon HD 3650 256MB		78 Watts
	Difference: 35 Watts (81%)

Memory Bandwidth

Performance-wise, the Radeon HD 3650 256MB should in theory be a bit superior to the GeForce GT 320 overall. (explain)

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

Texel Rate

The GeForce GT 320 should be a lot (about 123%) faster with regards to AF than the Radeon HD 3650 256MB. (explain)

GeForce GT 320		12960 Mtexels/sec
Radeon HD 3650 256MB		5800 Mtexels/sec
	Difference: 7160 (123%)

Pixel Rate

The GeForce GT 320 should be much (about 49%) better at full screen anti-aliasing than the Radeon HD 3650 256MB, and also capable of handling higher resolutions without slowing down too much. (explain)

GeForce GT 320		4320 Mpixels/sec
Radeon HD 3650 256MB		2900 Mpixels/sec
	Difference: 1420 (49%)

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 largest amount of information (in units of MB per second) that can be transported past the external memory interface within a second. It's calculated by multiplying the card's bus width by its memory speed. If the card has DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's 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 texture map elements (texels) that can be processed in one second. This is calculated by multiplying the total texture units of the card 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 in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the core 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 many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.