GeForce GTS 450 1GB vs Radeon HD 4730

Intro

Compare all that to the Radeon HD 4730, which uses a 55 nm design. AMD has clocked the core speed at 700 MHz. The GDDR5 memory runs at a frequency of 900 MHz on this particular card. It features 640(128x5) SPUs along with 32 Texture Address Units and 8 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 450 1GB		106 Watts
Radeon HD 4730		140 Watts
	Difference: 34 Watts (32%)

Memory Bandwidth

Theoretically, the GeForce GTS 450 1GB should be just a bit faster than the Radeon HD 4730 overall. (explain)

GeForce GTS 450 1GB		57728 MB/sec
Radeon HD 4730		57600 MB/sec
	Difference: 128 (0%)

Texel Rate

The GeForce GTS 450 1GB is a little bit (about 12%) more effective at texture filtering than the Radeon HD 4730. (explain)

GeForce GTS 450 1GB		25056 Mtexels/sec
Radeon HD 4730		22400 Mtexels/sec
	Difference: 2656 (12%)

Pixel Rate

The GeForce GTS 450 1GB will be much (more or less 124%) faster with regards to anti-aliasing than the Radeon HD 4730, and also capable of handling higher screen resolutions without slowing down too much. (explain)

GeForce GTS 450 1GB		12528 Mpixels/sec
Radeon HD 4730		5600 Mpixels/sec
	Difference: 6928 (124%)

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 maximum amount of information (measured in MB per second) that can be transported past the external memory interface in a second. It is worked out by multiplying the card's interface width by its memory speed. If it uses DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units 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 output rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.