GeForce GTX 660 Ti vs Radeon HD 6450 (OEM) 1GB

Intro

Compare those specifications to the Radeon HD 6450 (OEM) 1GB, which has a core clock speed of 750 MHz and a GDDR5 memory frequency of 900 MHz. It also features a 64-bit memory bus, and makes use of a 40 nm design. It features 160 SPUs, 8 TAUs, and 4 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6450 (OEM) 1GB		31 Watts
GeForce GTX 660 Ti		150 Watts
	Difference: 119 Watts (384%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 660 Ti should be 400% faster than the Radeon HD 6450 (OEM) 1GB in general, because of its higher data rate. (explain)

GeForce GTX 660 Ti		144000 MB/sec
Radeon HD 6450 (OEM) 1GB		28800 MB/sec
	Difference: 115200 (400%)

Texel Rate

The GeForce GTX 660 Ti will be quite a bit (approximately 1608%) faster with regards to anisotropic filtering than the Radeon HD 6450 (OEM) 1GB. (explain)

GeForce GTX 660 Ti		102480 Mtexels/sec
Radeon HD 6450 (OEM) 1GB		6000 Mtexels/sec
	Difference: 96480 (1608%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTX 660 Ti is the winner, and very much so. (explain)

GeForce GTX 660 Ti		21960 Mpixels/sec
Radeon HD 6450 (OEM) 1GB		3000 Mpixels/sec
	Difference: 18960 (632%)

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 max amount of data (measured in megabytes per second) that can be moved across the external memory interface within a second. The number is worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's 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 can be applied in one second. This number is calculated by multiplying the total texture units by the core clock speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.