GeForce GTX 660 Ti vs Radeon HD 4670 512MB

Intro

Compare all that to the Radeon HD 4670 512MB, which features core speeds of 750 MHz on the GPU, and 1000 MHz on the 512 MB of GDDR4/GDDR3/DDR3/DDR2 memory. It features 320(64x5) SPUs along with 32 TAUs and 8 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4670 512MB		70 Watts
GeForce GTX 660 Ti		150 Watts
	Difference: 80 Watts (114%)

Memory Bandwidth

The GeForce GTX 660 Ti should theoretically perform a lot faster than the Radeon HD 4670 512MB overall. (explain)

GeForce GTX 660 Ti		144000 MB/sec
Radeon HD 4670 512MB		32000 MB/sec
	Difference: 112000 (350%)

Texel Rate

The GeForce GTX 660 Ti should be much (approximately 327%) more effective at texture filtering than the Radeon HD 4670 512MB. (explain)

GeForce GTX 660 Ti		102480 Mtexels/sec
Radeon HD 4670 512MB		24000 Mtexels/sec
	Difference: 78480 (327%)

Pixel Rate

The GeForce GTX 660 Ti is a lot (about 266%) faster with regards to anti-aliasing than the Radeon HD 4670 512MB, and also able to handle higher screen resolutions more effectively. (explain)

GeForce GTX 660 Ti		21960 Mpixels/sec
Radeon HD 4670 512MB		6000 Mpixels/sec
	Difference: 15960 (266%)

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 (measured in megabytes per second) that can be transported over the external memory interface in one second. The number is worked out by multiplying the bus width by its memory clock speed. If the card has DDR RAM, 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 higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.