GeForce 830M vs GeForce GTX 970M

Intro

Compare all that to the GeForce GTX 970M, which uses a 28 nm design. nVidia has clocked the core frequency at 924 MHz. The GDDR5 memory works at a frequency of 1000 MHz on this specific card. It features 1280 SPUs along with 80 TAUs and 48 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 830M		25 Watts
GeForce GTX 970M		75 Watts
	Difference: 50 Watts (200%)

Memory Bandwidth

In theory, the GeForce GTX 970M should be 567% quicker than the GeForce 830M in general, due to its higher data rate. (explain)

GeForce GTX 970M		96000 MB/sec
GeForce 830M		14400 MB/sec
	Difference: 81600 (567%)

Texel Rate

The GeForce GTX 970M should be quite a bit (approximately 349%) more effective at texture filtering than the GeForce 830M. (explain)

GeForce GTX 970M		73920 Mtexels/sec
GeForce 830M		16464 Mtexels/sec
	Difference: 57456 (349%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTX 970M is superior to the GeForce 830M, by far. (explain)

GeForce GTX 970M		44352 Mpixels/sec
GeForce 830M		8232 Mpixels/sec
	Difference: 36120 (439%)

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 (measured in megabytes per second) that can be transported across the external memory interface within a second. It's calculated by multiplying the interface width by the speed of its memory. If the card has DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, 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 number of texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number 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 fill rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.