GeForce GT 315 vs GeForce GTX 590

Intro

Compare that to the GeForce GTX 590, which uses a 40 nm design. nVidia has set the core frequency at 607 MHz. The GDDR5 memory runs at a frequency of 855 MHz on this specific card. It features 512 SPUs along with 64 Texture Address Units and 48 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 315		52 Watts
GeForce GTX 590		365 Watts
	Difference: 313 Watts (602%)

Memory Bandwidth

Performance-wise, the GeForce GTX 590 should theoretically be quite a bit better than the GeForce GT 315 overall. (explain)

GeForce GTX 590		328320 MB/sec
GeForce GT 315		25280 MB/sec
	Difference: 303040 (1199%)

Texel Rate

The GeForce GTX 590 is a lot (about 677%) faster with regards to AF than the GeForce GT 315. (explain)

GeForce GTX 590		77696 Mtexels/sec
GeForce GT 315		10000 Mtexels/sec
	Difference: 67696 (677%)

Pixel Rate

The GeForce GTX 590 should be quite a bit (approximately 1065%) faster with regards to AA than the GeForce GT 315, and should be able to handle higher resolutions without losing too much performance. (explain)

GeForce GTX 590		58272 Mpixels/sec
GeForce GT 315		5000 Mpixels/sec
	Difference: 53272 (1065%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the maximum amount of information (measured in MB per second) that can be transferred across the external memory interface in one second. The number is calculated by multiplying the bus 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 higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This number is calculated by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the 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 maximum number of pixels that the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.