GeForce GTS 450 1GB vs Radeon HD 3650

Intro

Compare those specifications to the Radeon HD 3650, which has a clock frequency of 725 MHz and a GDDR4 memory frequency of 800 MHz. It also makes use of a 128-bit bus, and uses a 55 nm design. It is comprised 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)

Radeon HD 3650		78 Watts
GeForce GTS 450 1GB		106 Watts
	Difference: 28 Watts (36%)

Memory Bandwidth

Theoretically speaking, the GeForce GTS 450 1GB should perform a lot faster than the Radeon HD 3650 in general. (explain)

GeForce GTS 450 1GB		57728 MB/sec
Radeon HD 3650		25600 MB/sec
	Difference: 32128 (126%)

Texel Rate

The GeForce GTS 450 1GB will be much (about 332%) faster with regards to AF than the Radeon HD 3650. (explain)

GeForce GTS 450 1GB		25056 Mtexels/sec
Radeon HD 3650		5800 Mtexels/sec
	Difference: 19256 (332%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTS 450 1GB is the winner, by a large margin. (explain)

GeForce GTS 450 1GB		12528 Mpixels/sec
Radeon HD 3650		2900 Mpixels/sec
	Difference: 9628 (332%)

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 maximum amount of information (in units of MB per second) that can be moved across the external memory interface within a second. The number is calculated by multiplying the bus width by its memory speed. If it uses DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This number is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

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