GeForce GTX 470 vs Radeon HD 4830 512MB

Intro

Compare all of that to the Radeon HD 4830 512MB, which comes with a core clock speed of 575 MHz and a GDDR3 memory frequency of 900 MHz. It also uses a 256-bit bus, and uses a 55 nm design. It is comprised of 640(128x5) SPUs, 32 Texture Address Units, and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4830 512MB		95 Watts
GeForce GTX 470		215 Watts
	Difference: 120 Watts (126%)

Memory Bandwidth

In theory, the GeForce GTX 470 should perform quite a bit faster than the Radeon HD 4830 512MB in general. (explain)

GeForce GTX 470		133920 MB/sec
Radeon HD 4830 512MB		57600 MB/sec
	Difference: 76320 (133%)

Texel Rate

The GeForce GTX 470 will be much (approximately 85%) more effective at AF than the Radeon HD 4830 512MB. (explain)

GeForce GTX 470		33992 Mtexels/sec
Radeon HD 4830 512MB		18400 Mtexels/sec
	Difference: 15592 (85%)

Pixel Rate

The GeForce GTX 470 is much (more or less 164%) better at full screen anti-aliasing than the Radeon HD 4830 512MB, and also should be able to handle higher screen resolutions without losing too much performance. (explain)

GeForce GTX 470		24280 Mpixels/sec
Radeon HD 4830 512MB		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: Bandwidth is the max amount of data (measured in megabytes per second) that can be transferred across the external memory interface within a second. It is calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.