GeForce GT 340 vs Radeon HD 4830 512MB

Intro

Compare those specifications to the Radeon HD 4830 512MB, which makes use of a 55 nm design. AMD has clocked the core speed at 575 MHz. The GDDR3 RAM works at a speed of 900 MHz on this model. It features 640(128x5) SPUs as well as 32 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 340		69 Watts
Radeon HD 4830 512MB		95 Watts
	Difference: 26 Watts (38%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 4830 512MB should be just a bit faster than the GeForce GT 340 in general. (explain)

Radeon HD 4830 512MB		57600 MB/sec
GeForce GT 340		54400 MB/sec
	Difference: 3200 (6%)

Texel Rate

The Radeon HD 4830 512MB is a little bit (more or less 5%) more effective at texture filtering than the GeForce GT 340. (explain)

Radeon HD 4830 512MB		18400 Mtexels/sec
GeForce GT 340		17600 Mtexels/sec
	Difference: 800 (5%)

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 4830 512MB is a better choice, by far. (explain)

Radeon HD 4830 512MB		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 information (counted in MB per second) that can be transported across the external memory interface in a second. The number is calculated by multiplying the card's interface width by its memory speed. If it uses DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better 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 amount of texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.