GeForce GTX 660 Ti vs Radeon HD 4830 1GB

Intro

Compare those specs to the Radeon HD 4830 1GB, which uses a 55 nm design. AMD has set the core speed at 575 MHz. The GDDR4 RAM is set to run at a speed of 900 MHz on this specific card. It features 640(128x5) SPUs as well as 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 660 Ti		150 Watts
	Difference: 55 Watts (58%)

Memory Bandwidth

The GeForce GTX 660 Ti should in theory perform a lot faster than the Radeon HD 4830 1GB overall. (explain)

GeForce GTX 660 Ti		144000 MB/sec
Radeon HD 4830 1GB		57600 MB/sec
	Difference: 86400 (150%)

Texel Rate

The GeForce GTX 660 Ti should be much (about 457%) better at texture filtering than the Radeon HD 4830 1GB. (explain)

GeForce GTX 660 Ti		102480 Mtexels/sec
Radeon HD 4830 1GB		18400 Mtexels/sec
	Difference: 84080 (457%)

Pixel Rate

The GeForce GTX 660 Ti should be much (more or less 139%) better at full screen anti-aliasing than the Radeon HD 4830 1GB, and will be capable of handling higher resolutions without losing too much performance. (explain)

GeForce GTX 660 Ti		21960 Mpixels/sec
Radeon HD 4830 1GB		9200 Mpixels/sec
	Difference: 12760 (139%)

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 (in units of MB per second) that can be moved past the external memory interface within a second. It's calculated by multiplying the interface width by the speed of its memory. If the card has DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This number is calculated by multiplying the total texture units of the card by the core speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.