GeForce GTX 650 Ti vs Radeon HD 4830 1GB

Intro

Compare all of that to the Radeon HD 4830 1GB, which makes use of a 55 nm design. AMD has set the core frequency at 575 MHz. The GDDR4 RAM is set to run at a speed of 900 MHz on this card. It features 640(128x5) SPUs along with 32 TAUs and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4830 1GB		95 Watts
GeForce GTX 650 Ti		110 Watts
	Difference: 15 Watts (16%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 650 Ti should in theory be much better than the Radeon HD 4830 1GB overall. (explain)

GeForce GTX 650 Ti		86400 MB/sec
Radeon HD 4830 1GB		57600 MB/sec
	Difference: 28800 (50%)

Texel Rate

The GeForce GTX 650 Ti will be quite a bit (approximately 223%) more effective at AF than the Radeon HD 4830 1GB. (explain)

GeForce GTX 650 Ti		59392 Mtexels/sec
Radeon HD 4830 1GB		18400 Mtexels/sec
	Difference: 40992 (223%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTX 650 Ti is the winner, by far. (explain)

GeForce GTX 650 Ti		14848 Mpixels/sec
Radeon HD 4830 1GB		9200 Mpixels/sec
	Difference: 5648 (61%)

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 (in units of MB per second) that can be transported across the external memory interface in a second. It's calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better 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 applied in one second. This number is worked out by multiplying the total texture units by the core clock speed of the chip. The better the texel rate, the better the video 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 number of pixels the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.