GeForce 825M vs GeForce 9500 GT DDR2

Intro

Compare those specifications to the GeForce 9500 GT DDR2, which features a clock frequency of 550 MHz and a DDR2 memory speed of 500 MHz. It also features a 128-bit memory bus, and makes use of a 65 nm design. It is comprised of 32 SPUs, 16 Texture Address Units, and 8 Raster Operation Units.

Display Graphs

Hide Graphs

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

Theoretically speaking, the GeForce 9500 GT DDR2 is 11% quicker than the GeForce 825M overall, due to 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 AF than the GeForce 9500 GT DDR2. (explain)

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

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce 825M is superior to the GeForce 9500 GT DDR2, by far. (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: Bandwidth is the maximum amount of information (in units of MB per second) that can be transferred over the external memory interface in a second. It is calculated by multiplying the interface width by its memory clock speed. If the card has DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This figure is worked out by multiplying the total number of texture units of the card by the core clock 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 a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the core clock speed. 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, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.