GeForce 830M vs GeForce 8500 GT

Intro

Compare all of that to the GeForce 8500 GT, which has clock speeds of 450 MHz on the GPU, and 400 MHz on the 512 MB of DDR2 memory. It features 16 SPUs as well as 8 TAUs 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

The GeForce 830M should theoretically perform 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 will be quite a bit (more or less 357%) better at texture filtering than the GeForce 8500 GT. (explain)

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

Pixel Rate

If running with a high resolution is important to you, then the GeForce 830M is a better choice, by a large margin. (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: Bandwidth is the largest amount of information (counted in MB per second) that can be transferred across the external memory interface in one second. It's worked out by multiplying the bus width by the speed of its memory. In the case of DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This number is calculated by multiplying the total number of texture units 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 per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.