GeForce GTX 650 Ti vs Radeon HD 4670 512MB

Intro

Compare all that to the Radeon HD 4670 512MB, which comes with a core clock frequency of 750 MHz and a GDDR4/GDDR3/DDR3/DDR2 memory speed of 1000 MHz. It also uses a 128-bit memory bus, and makes use of a 55 nm design. It is comprised of 320(64x5) SPUs, 32 Texture Address Units, and 8 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4670 512MB		70 Watts
GeForce GTX 650 Ti		110 Watts
	Difference: 40 Watts (57%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 650 Ti is 170% faster than the Radeon HD 4670 512MB overall, because of its higher data rate. (explain)

GeForce GTX 650 Ti		86400 MB/sec
Radeon HD 4670 512MB		32000 MB/sec
	Difference: 54400 (170%)

Texel Rate

The GeForce GTX 650 Ti is a lot (approximately 147%) faster with regards to texture filtering than the Radeon HD 4670 512MB. (explain)

GeForce GTX 650 Ti		59392 Mtexels/sec
Radeon HD 4670 512MB		24000 Mtexels/sec
	Difference: 35392 (147%)

Pixel Rate

The GeForce GTX 650 Ti will be quite a bit (about 147%) better at anti-aliasing than the Radeon HD 4670 512MB, and will be able to handle higher screen resolutions more effectively. (explain)

GeForce GTX 650 Ti		14848 Mpixels/sec
Radeon HD 4670 512MB		6000 Mpixels/sec
	Difference: 8848 (147%)

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 information (measured in MB per second) that can be transported past the external memory interface in one second. It's worked out by multiplying the bus width by the speed of its memory. If the card has DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly write to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. 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 fill rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.