GeForce 830M vs GeForce 8500 GT

Intro

Compare those specs to the GeForce 8500 GT, which comes with core clock speeds of 450 MHz on the GPU, and 400 MHz on the 512 MB of DDR2 RAM. It features 16 SPUs along with 8 Texture Address Units and 4 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 830M		25 Watts
GeForce 8500 GT		45 Watts
	Difference: 20 Watts (80%)

Memory Bandwidth

Theoretically speaking, the GeForce 830M should be a bit faster than the GeForce 8500 GT overall. (explain)

GeForce 830M		14400 MB/sec
GeForce 8500 GT		12800 MB/sec
	Difference: 1600 (13%)

Texel Rate

The GeForce 830M is much (about 357%) faster with regards to AF than the GeForce 8500 GT. (explain)

GeForce 830M		16464 Mtexels/sec
GeForce 8500 GT		3600 Mtexels/sec
	Difference: 12864 (357%)

Pixel Rate

The GeForce 830M is a lot (approximately 357%) faster with regards to AA than the GeForce 8500 GT, and also able to handle higher screen resolutions without slowing down too much. (explain)

GeForce 830M		8232 Mpixels/sec
GeForce 8500 GT		1800 Mpixels/sec
	Difference: 6432 (357%)

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 data (counted in megabytes per second) that can be transported over the external memory interface in a second. It is calculated by multiplying the card's interface width by its memory speed. If the card has DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This number is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels 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. Pixel rate is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.