GeForce GTX 470 vs Radeon HD 4830 1GB

Intro

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

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4830 1GB		95 Watts
GeForce GTX 470		215 Watts
	Difference: 120 Watts (126%)

Memory Bandwidth

The GeForce GTX 470, in theory, should perform a lot faster than the Radeon HD 4830 1GB in general. (explain)

GeForce GTX 470		133920 MB/sec
Radeon HD 4830 1GB		57600 MB/sec
	Difference: 76320 (133%)

Texel Rate

The GeForce GTX 470 will be quite a bit (about 85%) faster with regards to anisotropic filtering than the Radeon HD 4830 1GB. (explain)

GeForce GTX 470		33992 Mtexels/sec
Radeon HD 4830 1GB		18400 Mtexels/sec
	Difference: 15592 (85%)

Pixel Rate

The GeForce GTX 470 is quite a bit (approximately 164%) faster with regards to FSAA than the Radeon HD 4830 1GB, and should be able to handle higher resolutions without slowing down too much. (explain)

GeForce GTX 470		24280 Mpixels/sec
Radeon HD 4830 1GB		9200 Mpixels/sec
	Difference: 15080 (164%)

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 over the external memory interface within a second. It is worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card could 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 clock 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 output rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.