GeForce 9800 GT 512MB vs GeForce GTX 965M

Intro

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

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 965M		60 Watts
GeForce 9800 GT 512MB		105 Watts
	Difference: 45 Watts (75%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 965M should be a little bit faster than the GeForce 9800 GT 512MB in general. (explain)

GeForce GTX 965M		64000 MB/sec
GeForce 9800 GT 512MB		57600 MB/sec
	Difference: 6400 (11%)

Texel Rate

The GeForce GTX 965M is quite a bit (approximately 80%) better at AF than the GeForce 9800 GT 512MB. (explain)

GeForce GTX 965M		60416 Mtexels/sec
GeForce 9800 GT 512MB		33600 Mtexels/sec
	Difference: 26816 (80%)

Pixel Rate

The GeForce GTX 965M should be quite a bit (about 215%) more effective at FSAA than the GeForce 9800 GT 512MB, and capable of handling higher screen resolutions while still performing well. (explain)

GeForce GTX 965M		30208 Mpixels/sec
GeForce 9800 GT 512MB		9600 Mpixels/sec
	Difference: 20608 (215%)

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 largest amount of information (measured in megabytes per second) that can be moved past the external memory interface in one second. The number is worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR type memory, the result 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, HDR and higher screen 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 number of texture units by the core speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly record to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units 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 fill rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.