Geforce GTX 670 vs Radeon HD 4830 1GB

Intro

Compare all that to the Radeon HD 4830 1GB, which features a clock speed of 575 MHz and a GDDR4 memory frequency of 900 MHz. It also makes use of a 256-bit memory bus, and uses a 55 nm design. It features 640(128x5) SPUs, 32 Texture Address Units, 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 670		170 Watts
	Difference: 75 Watts (79%)

Memory Bandwidth

The Geforce GTX 670 should in theory perform quite a bit faster than the Radeon HD 4830 1GB overall. (explain)

Geforce GTX 670		192000 MB/sec
Radeon HD 4830 1GB		57600 MB/sec
	Difference: 134400 (233%)

Texel Rate

The Geforce GTX 670 is a lot (more or less 457%) better at anisotropic filtering than the Radeon HD 4830 1GB. (explain)

Geforce GTX 670		102480 Mtexels/sec
Radeon HD 4830 1GB		18400 Mtexels/sec
	Difference: 84080 (457%)

Pixel Rate

If running with a high resolution is important to you, then the Geforce GTX 670 is the winner, and very much so. (explain)

Geforce GTX 670		29280 Mpixels/sec
Radeon HD 4830 1GB		9200 Mpixels/sec
	Difference: 20080 (218%)

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 information (measured in MB per second) that can be moved over the external memory interface within a second. The number 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 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, 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 that the graphics chip could possibly record to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.