GeForce 9800 GTX+ vs Radeon HD 4830 512MB

Intro

Compare that to the Radeon HD 4830 512MB, which uses a 55 nm design. AMD has set the core speed at 575 MHz. The GDDR3 RAM is set to run 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

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4830 512MB		95 Watts
GeForce 9800 GTX+		145 Watts
	Difference: 50 Watts (53%)

Memory Bandwidth

The GeForce 9800 GTX+ should in theory perform quite a bit faster than the Radeon HD 4830 512MB in general. (explain)

GeForce 9800 GTX+		70400 MB/sec
Radeon HD 4830 512MB		57600 MB/sec
	Difference: 12800 (22%)

Texel Rate

The GeForce 9800 GTX+ is a lot (more or less 157%) faster with regards to AF than the Radeon HD 4830 512MB. (explain)

GeForce 9800 GTX+		47232 Mtexels/sec
Radeon HD 4830 512MB		18400 Mtexels/sec
	Difference: 28832 (157%)

Pixel Rate

The GeForce 9800 GTX+ will be much (more or less 28%) more effective at full screen anti-aliasing than the Radeon HD 4830 512MB, and also should be able to handle higher screen resolutions while still performing well. (explain)

GeForce 9800 GTX+		11808 Mpixels/sec
Radeon HD 4830 512MB		9200 Mpixels/sec
	Difference: 2608 (28%)

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 largest amount of data (measured in MB per second) that can be moved across the external memory interface in one second. It is calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the 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 number of texture map elements (texels) that are applied per second. This is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number 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 filling the screen with pixels (the image). The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.