GeForce GTX 465 vs Radeon HD 5450

Intro

Compare all of that to the Radeon HD 5450, which features a GPU core clock speed of 650 MHz, and 512 MB of DDR3 memory set to run at 800 MHz through a 64-bit bus. It also features 80(16x5) Stream Processors, 8 TAUs, and 4 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5450		19 Watts
GeForce GTX 465		200 Watts
	Difference: 181 Watts (953%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 465 should perform quite a bit faster than the Radeon HD 5450 overall. (explain)

GeForce GTX 465		102592 MB/sec
Radeon HD 5450		12800 MB/sec
	Difference: 89792 (702%)

Texel Rate

The GeForce GTX 465 will be quite a bit (about 414%) faster with regards to texture filtering than the Radeon HD 5450. (explain)

GeForce GTX 465		26708 Mtexels/sec
Radeon HD 5450		5200 Mtexels/sec
	Difference: 21508 (414%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTX 465 is the winner, and very much so. (explain)

GeForce GTX 465		19424 Mpixels/sec
Radeon HD 5450		2600 Mpixels/sec
	Difference: 16824 (647%)

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 max amount of data (in units of megabytes per second) that can be moved across the external memory interface in one second. It is calculated by multiplying the card's interface width by its memory speed. If it uses DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This number is worked out by multiplying the total amount of texture units 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 in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.