GeForce 840M vs GeForce 9500 GT DDR2

Intro

Compare all of that to the GeForce 9500 GT DDR2, which makes use of a 65 nm design. nVidia has set the core speed at 550 MHz. The DDR2 RAM works at a speed of 500 MHz on this card. It features 32 SPUs as well as 16 TAUs and 8 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 840M		30 Watts
GeForce 9500 GT DDR2		50 Watts
	Difference: 20 Watts (67%)

Memory Bandwidth

Both cards have the exact same memory bandwidth, so in theory they should perform exactly the same. (explain)

Texel Rate

The GeForce 840M is much (more or less 181%) faster with regards to AF than the GeForce 9500 GT DDR2. (explain)

GeForce 840M		24696 Mtexels/sec
GeForce 9500 GT DDR2		8800 Mtexels/sec
	Difference: 15896 (181%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce 840M is superior to the GeForce 9500 GT DDR2, by a large margin. (explain)

GeForce 840M		8232 Mpixels/sec
GeForce 9500 GT DDR2		4400 Mpixels/sec
	Difference: 3832 (87%)

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 (counted in megabytes per second) that can be transferred past the external memory interface within a second. It's calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This figure is worked out by multiplying the total texture units 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 applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly record to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.