GeForce 8800 Ultra vs GeForce GTX 650 Ti 2GB

Intro

Compare those specs to the GeForce GTX 650 Ti 2GB, which comes with clock speeds of 928 MHz on the GPU, and 1350 MHz on the 2048 MB of GDDR5 memory. It features 768 SPUs as well as 64 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650 Ti 2GB		110 Watts
GeForce 8800 Ultra		171 Watts
	Difference: 61 Watts (55%)

Memory Bandwidth

Theoretically speaking, the GeForce 8800 Ultra should be 20% quicker than the GeForce GTX 650 Ti 2GB in general, because of its higher data rate. (explain)

GeForce 8800 Ultra		103680 MB/sec
GeForce GTX 650 Ti 2GB		86400 MB/sec
	Difference: 17280 (20%)

Texel Rate

The GeForce GTX 650 Ti 2GB is a lot (about 52%) more effective at texture filtering than the GeForce 8800 Ultra. (explain)

GeForce GTX 650 Ti 2GB		59392 Mtexels/sec
GeForce 8800 Ultra		39168 Mtexels/sec
	Difference: 20224 (52%)

Pixel Rate

The GeForce GTX 650 Ti 2GB will be just a bit (approximately 1%) faster with regards to FSAA than the GeForce 8800 Ultra, and also able to handle higher resolutions better. (explain)

GeForce GTX 650 Ti 2GB		14848 Mpixels/sec
GeForce 8800 Ultra		14688 Mpixels/sec
	Difference: 160 (1%)

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 transported past the external memory interface in a second. It's worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.