GeForce 825M vs GeForce 9500 GT DDR2

Intro

Compare those specs to the GeForce 9500 GT DDR2, which comes with GPU core speed of 550 MHz, and 256 MB of DDR2 memory set to run at 500 MHz through a 128-bit bus. It also is made up of 32 Stream Processors, 16 TAUs, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 825M		33 Watts
GeForce 9500 GT DDR2		50 Watts
	Difference: 17 Watts (52%)

Memory Bandwidth

In theory, the GeForce 9500 GT DDR2 is 11% faster than the GeForce 825M overall, because of its greater data rate. (explain)

GeForce 9500 GT DDR2		16000 MB/sec
GeForce 825M		14400 MB/sec
	Difference: 1600 (11%)

Texel Rate

The GeForce 825M is quite a bit (more or less 55%) faster with regards to texture filtering than the GeForce 9500 GT DDR2. (explain)

GeForce 825M		13600 Mtexels/sec
GeForce 9500 GT DDR2		8800 Mtexels/sec
	Difference: 4800 (55%)

Pixel Rate

The GeForce 825M will be much (more or less 55%) better at full screen anti-aliasing than the GeForce 9500 GT DDR2, and will be able to handle higher resolutions without losing too much performance. (explain)

GeForce 825M		6800 Mpixels/sec
GeForce 9500 GT DDR2		4400 Mpixels/sec
	Difference: 2400 (55%)

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 information (in units of MB per second) that can be moved across the external memory interface in a second. It's calculated by multiplying the interface width by its memory clock speed. In the case of DDR RAM, 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 anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output 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.