GeForce 9800 GX2 vs GeForce GTX 965M

Intro

Compare those specifications to the GeForce GTX 965M, which uses a 28 nm design. nVidia has clocked the core speed at 944 MHz. The GDDR5 RAM runs at a speed of 1000 MHz on this specific card. It features 1024 SPUs as well as 64 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 965M		60 Watts
GeForce 9800 GX2		197 Watts
	Difference: 137 Watts (228%)

Memory Bandwidth

Performance-wise, the GeForce 9800 GX2 should theoretically be much better than the GeForce GTX 965M overall. (explain)

GeForce 9800 GX2		128000 MB/sec
GeForce GTX 965M		64000 MB/sec
	Difference: 64000 (100%)

Texel Rate

The GeForce 9800 GX2 will be a lot (approximately 27%) more effective at AF than the GeForce GTX 965M. (explain)

GeForce 9800 GX2		76800 Mtexels/sec
GeForce GTX 965M		60416 Mtexels/sec
	Difference: 16384 (27%)

Pixel Rate

The GeForce GTX 965M will be quite a bit (more or less 57%) better at anti-aliasing than the GeForce 9800 GX2, and able to handle higher resolutions more effectively. (explain)

GeForce GTX 965M		30208 Mpixels/sec
GeForce 9800 GX2		19200 Mpixels/sec
	Difference: 11008 (57%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the max amount of data (counted in megabytes per second) that can be transferred across the external memory interface within a second. It's worked out by multiplying the interface width by the speed of its memory. If it uses DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, 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 number of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

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