GeForce GT 450 (OEM) vs Radeon HD 5770

Intro

Compare those specs to the Radeon HD 5770, which comes with GPU core speed of 850 MHz, and 1024 MB of GDDR5 memory set to run at 1200 MHz through a 128-bit bus. It also features 800(160x5) Stream Processors, 40 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 450 (OEM)		106 Watts
Radeon HD 5770		108 Watts
	Difference: 2 Watts (2%)

Memory Bandwidth

Performance-wise, the GeForce GT 450 (OEM) should in theory be quite a bit better than the Radeon HD 5770 in general. (explain)

GeForce GT 450 (OEM)		96000 MB/sec
Radeon HD 5770		76800 MB/sec
	Difference: 19200 (25%)

Texel Rate

The Radeon HD 5770 is a lot (approximately 79%) more effective at anisotropic filtering than the GeForce GT 450 (OEM). (explain)

Radeon HD 5770		34000 Mtexels/sec
GeForce GT 450 (OEM)		18960 Mtexels/sec
	Difference: 15040 (79%)

Pixel Rate

The GeForce GT 450 (OEM) should be quite a bit (about 39%) faster with regards to FSAA than the Radeon HD 5770, and will be able to handle higher screen resolutions more effectively. (explain)

GeForce GT 450 (OEM)		18960 Mpixels/sec
Radeon HD 5770		13600 Mpixels/sec
	Difference: 5360 (39%)

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 largest amount of information (counted in megabytes per second) that can be transferred across the external memory interface within a second. It's calculated by multiplying the card's interface width by its memory speed. If it uses DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.