GeForce GTX 650 vs Radeon HD 4670 512MB

Intro

Compare those specifications to the Radeon HD 4670 512MB, which has GPU clock speed of 750 MHz, and 512 MB of GDDR4/GDDR3/DDR3/DDR2 memory set to run at 1000 MHz through a 128-bit bus. It also features 320(64x5) Stream Processors, 32 Texture Address Units, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650		64 Watts
Radeon HD 4670 512MB		70 Watts
	Difference: 6 Watts (9%)

Memory Bandwidth

Theoretically, the GeForce GTX 650 should be a lot faster than the Radeon HD 4670 512MB in general. (explain)

GeForce GTX 650		80000 MB/sec
Radeon HD 4670 512MB		32000 MB/sec
	Difference: 48000 (150%)

Texel Rate

The GeForce GTX 650 is quite a bit (about 41%) more effective at texture filtering than the Radeon HD 4670 512MB. (explain)

GeForce GTX 650		33856 Mtexels/sec
Radeon HD 4670 512MB		24000 Mtexels/sec
	Difference: 9856 (41%)

Pixel Rate

The GeForce GTX 650 should be much (more or less 182%) better at FSAA than the Radeon HD 4670 512MB, and should be able to handle higher resolutions better. (explain)

GeForce GTX 650		16928 Mpixels/sec
Radeon HD 4670 512MB		6000 Mpixels/sec
	Difference: 10928 (182%)

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 data (in units of megabytes per second) that can be moved across the external memory interface in a second. The number is calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, 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 texture map elements (texels) that can be applied per second. This is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The better this number, the better the 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 maximum amount of pixels that the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the the core 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 fill rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.