GeForce GTS 450 1GB vs Radeon HD 5570

Intro

Compare those specs to the Radeon HD 5570, which has GPU core speed of 650 MHz, and 512 MB of DDR3 memory set to run at 900 MHz through a 128-bit bus. It also features 400(80x5) SPUs, 20 Texture Address Units, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5570		43 Watts
GeForce GTS 450 1GB		106 Watts
	Difference: 63 Watts (147%)

Memory Bandwidth

Theoretically speaking, the GeForce GTS 450 1GB is 100% quicker than the Radeon HD 5570 overall, because of its greater bandwidth. (explain)

GeForce GTS 450 1GB		57728 MB/sec
Radeon HD 5570		28800 MB/sec
	Difference: 28928 (100%)

Texel Rate

The GeForce GTS 450 1GB will be a lot (approximately 93%) faster with regards to AF than the Radeon HD 5570. (explain)

GeForce GTS 450 1GB		25056 Mtexels/sec
Radeon HD 5570		13000 Mtexels/sec
	Difference: 12056 (93%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTS 450 1GB is a better choice, and very much so. (explain)

GeForce GTS 450 1GB		12528 Mpixels/sec
Radeon HD 5570		5200 Mpixels/sec
	Difference: 7328 (141%)

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 information (in units of megabytes per second) that can be transferred past the external memory interface in one second. The number is calculated by multiplying the card's bus width by the speed of its memory. If it uses DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.