GeForce GTX 750 Ti vs Radeon HD 4830 1GB

Intro

Compare those specifications to the Radeon HD 4830 1GB, which comes with GPU clock speed of 575 MHz, and 1024 MB of GDDR4 RAM running at 900 MHz through a 256-bit bus. It also is comprised of 640(128x5) Stream Processors, 32 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 750 Ti		60 Watts
Radeon HD 4830 1GB		95 Watts
	Difference: 35 Watts (58%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 750 Ti is 50% faster than the Radeon HD 4830 1GB overall, because of its higher bandwidth. (explain)

GeForce GTX 750 Ti		86400 MB/sec
Radeon HD 4830 1GB		57600 MB/sec
	Difference: 28800 (50%)

Texel Rate

The GeForce GTX 750 Ti will be quite a bit (more or less 122%) more effective at anisotropic filtering than the Radeon HD 4830 1GB. (explain)

GeForce GTX 750 Ti		40800 Mtexels/sec
Radeon HD 4830 1GB		18400 Mtexels/sec
	Difference: 22400 (122%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTX 750 Ti is a better choice, by far. (explain)

GeForce GTX 750 Ti		16320 Mpixels/sec
Radeon HD 4830 1GB		9200 Mpixels/sec
	Difference: 7120 (77%)

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 information (measured in megabytes per second) that can be moved past the external memory interface within a second. It's worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR 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 figure is calculated by multiplying the total texture units by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.