GeForce GT 340 vs Radeon HD 4830 1GB

Intro

Compare all that to the Radeon HD 4830 1GB, which comes with clock speeds of 575 MHz on the GPU, and 900 MHz on the 1024 MB of GDDR4 RAM. It features 640(128x5) SPUs as well as 32 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 4830 1GB		95 Watts
	Difference: 26 Watts (38%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 4830 1GB should perform a little bit faster than the GeForce GT 340 in general. (explain)

Radeon HD 4830 1GB		57600 MB/sec
GeForce GT 340		54400 MB/sec
	Difference: 3200 (6%)

Texel Rate

The Radeon HD 4830 1GB is just a bit (about 5%) faster with regards to texture filtering than the GeForce GT 340. (explain)

Radeon HD 4830 1GB		18400 Mtexels/sec
GeForce GT 340		17600 Mtexels/sec
	Difference: 800 (5%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon HD 4830 1GB is a better choice, by a large margin. (explain)

Radeon HD 4830 1GB		9200 Mpixels/sec
GeForce GT 340		4400 Mpixels/sec
	Difference: 4800 (109%)

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 max amount of data (measured in megabytes per second) that can be moved over the external memory interface in one second. The number is worked out by multiplying the card's bus width by its memory speed. If the card has DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also 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 - the lower the bandwidth is, the lower the potential to get to the max fill rate.