GeForce GT 320 vs Radeon HD 5450

Intro

Compare all of that to the Radeon HD 5450, which has a clock frequency of 650 MHz and a DDR3 memory speed of 800 MHz. It also uses a 64-bit bus, and makes use of a 40 nm design. It features 80(16x5) SPUs, 8 Texture Address Units, and 4 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5450		19 Watts
GeForce GT 320		43 Watts
	Difference: 24 Watts (126%)

Memory Bandwidth

In theory, the GeForce GT 320 should perform quite a bit faster than the Radeon HD 5450 in general. (explain)

GeForce GT 320		25280 MB/sec
Radeon HD 5450		12800 MB/sec
	Difference: 12480 (98%)

Texel Rate

The GeForce GT 320 is much (about 149%) better at anisotropic filtering than the Radeon HD 5450. (explain)

GeForce GT 320		12960 Mtexels/sec
Radeon HD 5450		5200 Mtexels/sec
	Difference: 7760 (149%)

Pixel Rate

The GeForce GT 320 will be much (approximately 66%) faster with regards to AA than the Radeon HD 5450, and also should be capable of handling higher screen resolutions more effectively. (explain)

GeForce GT 320		4320 Mpixels/sec
Radeon HD 5450		2600 Mpixels/sec
	Difference: 1720 (66%)

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 data (in units of MB per second) that can be moved past the external memory interface within a second. It is calculated by multiplying the bus width by its memory clock speed. If the card has DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.