GeForce GTS 450 vs Radeon HD 4730

Intro

Compare all of that to the Radeon HD 4730, which features a clock frequency of 700 MHz and a GDDR5 memory frequency of 900 MHz. It also uses a 128-bit bus, and makes use of a 55 nm design. It is made up of 640(128x5) SPUs, 32 TAUs, and 8 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

In theory, the GeForce GTS 450 is 0% quicker than the Radeon HD 4730 in general, due to its higher data rate. (explain)

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

Texel Rate

The GeForce GTS 450 should be a bit (approximately 12%) faster with regards to anisotropic filtering than the Radeon HD 4730. (explain)

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

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTS 450 is the winner, by a large margin. (explain)

GeForce GTS 450		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: Memory bandwidth is the largest amount of data (measured in MB per second) that can be transported past the external memory interface within a second. It is calculated by multiplying the interface width by the speed of its memory. If the card has DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This figure is calculated by multiplying the total number of texture units by the core speed of the chip. The better the texel rate, the better the video card will be at handling 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 that the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.