GeForce GTS 450 vs Radeon HD 3650

Intro

Compare those specifications to the Radeon HD 3650, which uses a 55 nm design. AMD has set the core speed at 725 MHz. The GDDR4 RAM works at a frequency of 800 MHz on this particular card. It features 120(24x5) SPUs along with 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		106 Watts
	Difference: 28 Watts (36%)

Memory Bandwidth

Theoretically speaking, the GeForce GTS 450 should be quite a bit faster than the Radeon HD 3650 in general. (explain)

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

Texel Rate

The GeForce GTS 450 will be a lot (approximately 332%) faster with regards to texture filtering than the Radeon HD 3650. (explain)

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

Pixel Rate

The GeForce GTS 450 should be a lot (approximately 332%) more effective at AA than the Radeon HD 3650, and will be able to handle higher screen resolutions while still performing well. (explain)

GeForce GTS 450		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 max amount of data (in units of MB per second) that can be moved past the external memory interface in a second. It is worked out by multiplying the card's interface width by its memory speed. If the card has DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.