GeForce GT 340 vs Radeon HD 5450

Intro

Compare all that to the Radeon HD 5450, which features a clock frequency of 650 MHz and a DDR3 memory frequency of 800 MHz. It also features a 64-bit memory bus, and uses a 40 nm design. It features 80(16x5) SPUs, 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 GT 340		69 Watts
	Difference: 50 Watts (263%)

Memory Bandwidth

In theory, the GeForce GT 340 should be 325% quicker than the Radeon HD 5450 overall, because of its greater bandwidth. (explain)

GeForce GT 340		54400 MB/sec
Radeon HD 5450		12800 MB/sec
	Difference: 41600 (325%)

Texel Rate

The GeForce GT 340 will be a lot (about 238%) better at anisotropic filtering than the Radeon HD 5450. (explain)

GeForce GT 340		17600 Mtexels/sec
Radeon HD 5450		5200 Mtexels/sec
	Difference: 12400 (238%)

Pixel Rate

The GeForce GT 340 will be much (about 69%) more effective at FSAA than the Radeon HD 5450, and also will be able to handle higher resolutions without losing too much performance. (explain)

GeForce GT 340		4400 Mpixels/sec
Radeon HD 5450		2600 Mpixels/sec
	Difference: 1800 (69%)

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 transported past the external memory interface in a second. It's worked out by multiplying the bus width by its memory speed. In the case of DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the 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 applied in one second. This is calculated by multiplying the total amount of texture units by the core speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units 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 output 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 max fill rate.