GeForce 9800 GTX+ vs GeForce GTX 950M

Intro

Compare those specifications to the GeForce GTX 950M, which comes with GPU core speed of 914 MHz, and 2048 MB of DDR3 RAM set to run at 1000 MHz through a 128-bit bus. It also is comprised of 640 SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 950M		55 Watts
GeForce 9800 GTX+		145 Watts
	Difference: 90 Watts (164%)

Memory Bandwidth

Performance-wise, the GeForce 9800 GTX+ should in theory be quite a bit better than the GeForce GTX 950M overall. (explain)

GeForce 9800 GTX+		70400 MB/sec
GeForce GTX 950M		32000 MB/sec
	Difference: 38400 (120%)

Texel Rate

The GeForce 9800 GTX+ will be a lot (more or less 29%) more effective at anisotropic filtering than the GeForce GTX 950M. (explain)

GeForce 9800 GTX+		47232 Mtexels/sec
GeForce GTX 950M		36560 Mtexels/sec
	Difference: 10672 (29%)

Pixel Rate

The GeForce GTX 950M is quite a bit (more or less 24%) better at anti-aliasing than the GeForce 9800 GTX+, and also able to handle higher resolutions without losing too much performance. (explain)

GeForce GTX 950M		14624 Mpixels/sec
GeForce 9800 GTX+		11808 Mpixels/sec
	Difference: 2816 (24%)

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 maximum amount of data (counted in megabytes per second) that can be transported across the external memory interface in one second. The number is worked out by multiplying the bus width by the speed of its memory. If it uses DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This number is calculated by multiplying the total 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 the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.