GeForce GTX 465 vs GeForce GTX 880M

Intro

Compare those specifications to the GeForce GTX 880M, which comes with a clock frequency of 954 MHz and a GDDR5 memory frequency of 1000 MHz. It also uses a 256-bit bus, and uses a 28 nm design. It is comprised of 1536 SPUs, 128 TAUs, and 32 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 880M		130 Watts
GeForce GTX 465		200 Watts
	Difference: 70 Watts (54%)

Memory Bandwidth

The GeForce GTX 880M, in theory, should be much faster than the GeForce GTX 465 in general. (explain)

GeForce GTX 880M		128000 MB/sec
GeForce GTX 465		102592 MB/sec
	Difference: 25408 (25%)

Texel Rate

The GeForce GTX 880M should be a lot (more or less 357%) better at anisotropic filtering than the GeForce GTX 465. (explain)

GeForce GTX 880M		122112 Mtexels/sec
GeForce GTX 465		26708 Mtexels/sec
	Difference: 95404 (357%)

Pixel Rate

The GeForce GTX 880M should be quite a bit (more or less 57%) more effective at full screen anti-aliasing than the GeForce GTX 465, and should be capable of handling higher screen resolutions without losing too much performance. (explain)

GeForce GTX 880M		30528 Mpixels/sec
GeForce GTX 465		19424 Mpixels/sec
	Difference: 11104 (57%)

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 (in units of MB per second) that can be transferred over the external memory interface within a second. It's calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the 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 number of texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels the video card 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 Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - aka 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 bandwidth is, the lower the ability to get to the max fill rate.