GeForce GTX 280 vs GeForce GTX 650 Ti 2GB

Intro

Compare all that to the GeForce GTX 650 Ti 2GB, which comes with GPU core speed of 928 MHz, and 2048 MB of GDDR5 memory set to run at 1350 MHz through a 128-bit bus. It also is comprised of 768 Stream Processors, 64 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650 Ti 2GB		110 Watts
GeForce GTX 280		236 Watts
	Difference: 126 Watts (115%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 280 will be 64% faster than the GeForce GTX 650 Ti 2GB overall, due to its greater bandwidth. (explain)

GeForce GTX 280		141696 MB/sec
GeForce GTX 650 Ti 2GB		86400 MB/sec
	Difference: 55296 (64%)

Texel Rate

The GeForce GTX 650 Ti 2GB will be quite a bit (approximately 23%) faster with regards to anisotropic filtering than the GeForce GTX 280. (explain)

GeForce GTX 650 Ti 2GB		59392 Mtexels/sec
GeForce GTX 280		48160 Mtexels/sec
	Difference: 11232 (23%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTX 280 is the winner, and very much so. (explain)

GeForce GTX 280		19264 Mpixels/sec
GeForce GTX 650 Ti 2GB		14848 Mpixels/sec
	Difference: 4416 (30%)

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 max amount of information (in units of megabytes per second) that can be transferred across the external memory interface within a second. It's worked out by multiplying the card's interface 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 ANOTHER 2x. The higher the memory bandwidth, the better 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 is calculated by multiplying the total amount of texture units 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 most pixels that the graphics chip can possibly record to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.