GeForce GTX 465 vs Radeon HD 4830 512MB

Intro

Compare all of that to the Radeon HD 4830 512MB, which uses a 55 nm design. AMD has clocked the core speed at 575 MHz. The GDDR3 RAM runs at a speed of 900 MHz on this particular card. It features 640(128x5) SPUs along with 32 TAUs 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 GTX 465		200 Watts
	Difference: 105 Watts (111%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 465 should be quite a bit faster than the Radeon HD 4830 512MB overall. (explain)

GeForce GTX 465		102592 MB/sec
Radeon HD 4830 512MB		57600 MB/sec
	Difference: 44992 (78%)

Texel Rate

The GeForce GTX 465 will be a lot (approximately 45%) more effective at anisotropic filtering than the Radeon HD 4830 512MB. (explain)

GeForce GTX 465		26708 Mtexels/sec
Radeon HD 4830 512MB		18400 Mtexels/sec
	Difference: 8308 (45%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 465 is a better choice, and very much so. (explain)

GeForce GTX 465		19424 Mpixels/sec
Radeon HD 4830 512MB		9200 Mpixels/sec
	Difference: 10224 (111%)

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 data (in units of megabytes per second) that can be moved past the external memory interface in one second. It's worked out by multiplying the interface width by its memory speed. In the case of DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This figure 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 video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.