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 is comprised of 400(80x5) SPUs, 20 TAUs, 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

In theory, the GeForce GTS 450 1GB should be quite a bit faster than the Radeon HD 5570 in general. (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 (about 93%) faster with regards to anisotropic filtering than the Radeon HD 5570. (explain)

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

Pixel Rate

The GeForce GTS 450 1GB should be a lot (approximately 141%) better at anti-aliasing than the Radeon HD 5570, and also should be able to handle higher screen resolutions better. (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: Bandwidth is the maximum amount of information (in units of megabytes per second) that can be transferred over the external memory interface in a second. It's calculated by multiplying the bus width by the speed of its memory. If the card has DDR type 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, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This is worked out by multiplying the total texture units by the core clock speed of the chip. The higher the texel rate, the better the graphics 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 amount of pixels the video card can possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines 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 rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.