GeForce GTX 285 1GB vs Radeon HD 5830

Intro

Compare those specs to the Radeon HD 5830, which features a clock speed of 800 MHz and a GDDR5 memory speed of 1000 MHz. It also uses a 256-bit bus, and makes use of a 40 nm design. It is made up of 1120(224x5) SPUs, 56 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5830		175 Watts
GeForce GTX 285 1GB		204 Watts
	Difference: 29 Watts (17%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 285 1GB should perform a lot faster than the Radeon HD 5830 overall. (explain)

GeForce GTX 285 1GB		158976 MB/sec
Radeon HD 5830		128000 MB/sec
	Difference: 30976 (24%)

Texel Rate

The GeForce GTX 285 1GB is a small bit (more or less 16%) faster with regards to texture filtering than the Radeon HD 5830. (explain)

GeForce GTX 285 1GB		51840 Mtexels/sec
Radeon HD 5830		44800 Mtexels/sec
	Difference: 7040 (16%)

Pixel Rate

The GeForce GTX 285 1GB is much (about 62%) more effective at full screen anti-aliasing than the Radeon HD 5830, and should be capable of handling higher screen resolutions without losing too much performance. (explain)

GeForce GTX 285 1GB		20736 Mpixels/sec
Radeon HD 5830		12800 Mpixels/sec
	Difference: 7936 (62%)

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 (in units of megabytes per second) that can be transported over the external memory interface in one second. It is worked out by multiplying the interface width by its memory speed. If the card has DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total number of texture units by the core 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 a second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.