GeForce GT 340 1GB vs Radeon HD 4830 1GB

Intro

Compare that to the Radeon HD 4830 1GB, which has a clock frequency of 575 MHz and a GDDR4 memory speed of 900 MHz. It also features a 256-bit bus, and uses a 55 nm design. It features 640(128x5) SPUs, 32 TAUs, and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 340 1GB		69 Watts
Radeon HD 4830 1GB		95 Watts
	Difference: 26 Watts (38%)

Memory Bandwidth

Performance-wise, the Radeon HD 4830 1GB should theoretically be a little bit better than the GeForce GT 340 1GB in general. (explain)

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

Texel Rate

The Radeon HD 4830 1GB will be just a bit (about 5%) more effective at texture filtering than the GeForce GT 340 1GB. (explain)

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

Pixel Rate

The Radeon HD 4830 1GB should be much (about 109%) faster with regards to full screen anti-aliasing than the GeForce GT 340 1GB, and will be capable of handling higher resolutions while still performing well. (explain)

Radeon HD 4830 1GB		9200 Mpixels/sec
GeForce GT 340 1GB		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: Memory bandwidth is the maximum amount of information (counted in MB per second) that can be transported past the external memory interface in one second. The number is calculated by multiplying the interface width by its memory clock 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, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better 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 one second.

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