GeForce GT 340 vs Radeon HD 4730

Intro

Compare all of that to the Radeon HD 4730, which comes with a GPU core clock speed of 700 MHz, and 512 MB of GDDR5 RAM running at 900 MHz through a 128-bit bus. It also is comprised of 640(128x5) SPUs, 32 Texture Address Units, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 340		69 Watts
Radeon HD 4730		140 Watts
	Difference: 71 Watts (103%)

Memory Bandwidth

As far as performance goes, the Radeon HD 4730 should theoretically be just a bit superior to the GeForce GT 340 overall. (explain)

Radeon HD 4730		57600 MB/sec
GeForce GT 340		54400 MB/sec
	Difference: 3200 (6%)

Texel Rate

The Radeon HD 4730 will be much (more or less 27%) better at anisotropic filtering than the GeForce GT 340. (explain)

Radeon HD 4730		22400 Mtexels/sec
GeForce GT 340		17600 Mtexels/sec
	Difference: 4800 (27%)

Pixel Rate

The Radeon HD 4730 should be quite a bit (approximately 27%) more effective at AA than the GeForce GT 340, and capable of handling higher screen resolutions while still performing well. (explain)

Radeon HD 4730		5600 Mpixels/sec
GeForce GT 340		4400 Mpixels/sec
	Difference: 1200 (27%)

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 largest amount of information (in units of megabytes 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 it uses DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly record to its 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 clock speed of the card. 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 rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.