GeForce GT 340 vs Radeon HD 4850 1GB

Intro

Compare that to the Radeon HD 4850 1GB, which comes with a GPU core clock speed of 625 MHz, and 1024 MB of GDDR4 memory set to run at 993 MHz through a 256-bit bus. It also is made up of 800(160x5) SPUs, 40 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 340		69 Watts
Radeon HD 4850 1GB		110 Watts
	Difference: 41 Watts (59%)

Memory Bandwidth

Theoretically, the Radeon HD 4850 1GB should perform a bit faster than the GeForce GT 340 in general. (explain)

Radeon HD 4850 1GB		63552 MB/sec
GeForce GT 340		54400 MB/sec
	Difference: 9152 (17%)

Texel Rate

The Radeon HD 4850 1GB is much (more or less 42%) faster with regards to texture filtering than the GeForce GT 340. (explain)

Radeon HD 4850 1GB		25000 Mtexels/sec
GeForce GT 340		17600 Mtexels/sec
	Difference: 7400 (42%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 4850 1GB is a better choice, by far. (explain)

Radeon HD 4850 1GB		10000 Mpixels/sec
GeForce GT 340		4400 Mpixels/sec
	Difference: 5600 (127%)

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 information (in units of megabytes per second) that can be moved past the external memory interface in a second. The number is worked out by multiplying the interface width by the speed of its memory. If it uses DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. 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 in one second. This figure is worked out by multiplying the total texture units 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 in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.