GeForce 8800 Ultra vs GeForce GTX 965M

Intro

Compare all that to the GeForce GTX 965M, which features a clock speed of 944 MHz and a GDDR5 memory frequency of 1000 MHz. It also uses a 128-bit memory bus, and uses a 28 nm design. It is made up of 1024 SPUs, 64 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 965M		60 Watts
GeForce 8800 Ultra		171 Watts
	Difference: 111 Watts (185%)

Memory Bandwidth

In theory, the GeForce 8800 Ultra should be 62% quicker than the GeForce GTX 965M in general, because of its greater data rate. (explain)

GeForce 8800 Ultra		103680 MB/sec
GeForce GTX 965M		64000 MB/sec
	Difference: 39680 (62%)

Texel Rate

The GeForce GTX 965M is much (approximately 54%) faster with regards to anisotropic filtering than the GeForce 8800 Ultra. (explain)

GeForce GTX 965M		60416 Mtexels/sec
GeForce 8800 Ultra		39168 Mtexels/sec
	Difference: 21248 (54%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 965M is a better choice, by a large margin. (explain)

GeForce GTX 965M		30208 Mpixels/sec
GeForce 8800 Ultra		14688 Mpixels/sec
	Difference: 15520 (106%)

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 (measured in MB per second) that can be moved over 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 DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster 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 amount of texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total number of texture units by the core 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 in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.