GeForce GTX 650 Ti 2GB vs Radeon HD 4650 512MB

Intro

Compare that to the Radeon HD 4650 512MB, which features GPU clock speed of 600 MHz, and 512 MB of DDR2 memory set to run at 500 MHz through a 128-bit bus. It also is comprised of 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)

Radeon HD 4650 512MB		55 Watts
GeForce GTX 650 Ti 2GB		110 Watts
	Difference: 55 Watts (100%)

Memory Bandwidth

The GeForce GTX 650 Ti 2GB, in theory, should be a lot faster than the Radeon HD 4650 512MB overall. (explain)

GeForce GTX 650 Ti 2GB		86400 MB/sec
Radeon HD 4650 512MB		16000 MB/sec
	Difference: 70400 (440%)

Texel Rate

The GeForce GTX 650 Ti 2GB should be quite a bit (more or less 209%) faster with regards to texture filtering than the Radeon HD 4650 512MB. (explain)

GeForce GTX 650 Ti 2GB		59392 Mtexels/sec
Radeon HD 4650 512MB		19200 Mtexels/sec
	Difference: 40192 (209%)

Pixel Rate

The GeForce GTX 650 Ti 2GB should be quite a bit (approximately 209%) more effective at full screen anti-aliasing than the Radeon HD 4650 512MB, and also able to handle higher screen resolutions while still performing well. (explain)

GeForce GTX 650 Ti 2GB		14848 Mpixels/sec
Radeon HD 4650 512MB		4800 Mpixels/sec
	Difference: 10048 (209%)

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 (in units of MB per second) that can be moved past the external memory interface within a second. The number is worked out by multiplying the card's bus width by its memory speed. If the card has DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high 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 amount of texture units by the core clock speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.