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GeForce GT 315 vs GeForce GTX 480

Intro

The GeForce GT 315 features a clock speed of 625 MHz and a DDR3 memory frequency of 790 MHz. It also makes use of a 128-bit memory bus, and uses a 40 nm design. It is made up of 48 SPUs, 16 Texture Address Units, and 8 ROPs.

Compare that to the GeForce GTX 480, which makes use of a 40 nm design. nVidia has clocked the core frequency at 700 MHz. The GDDR5 memory is set to run at a speed of 924 MHz on this particular model. It features 480 SPUs along with 60 Texture Address Units and 48 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 315 52 Watts
GeForce GTX 480 250 Watts
Difference: 198 Watts (381%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 480 should in theory be much better than the GeForce GT 315 overall. (explain)

GeForce GTX 480 177408 MB/sec
GeForce GT 315 25280 MB/sec
Difference: 152128 (602%)

Texel Rate

The GeForce GTX 480 should be a lot (about 320%) more effective at anisotropic filtering than the GeForce GT 315. (explain)

GeForce GTX 480 42000 Mtexels/sec
GeForce GT 315 10000 Mtexels/sec
Difference: 32000 (320%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTX 480 is the winner, by a large margin. (explain)

GeForce GTX 480 33600 Mpixels/sec
GeForce GT 315 5000 Mpixels/sec
Difference: 28600 (572%)

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

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GeForce GT 315

Amazon.com

Check prices at:

GeForce GTX 480

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model GeForce GT 315 GeForce GTX 480
Manufacturer nVidia nVidia
Year November 2009 March 2010
Code Name GT216 GF100
Memory 512 MB 1536 MB
Core Speed 625 MHz 700 MHz
Memory Speed 1580 MHz 3696 MHz
Power (Max TDP) 52 watts 250 watts
Bandwidth 25280 MB/sec 177408 MB/sec
Texel Rate 10000 Mtexels/sec 42000 Mtexels/sec
Pixel Rate 5000 Mpixels/sec 33600 Mpixels/sec
Unified Shaders 48 480
Texture Mapping Units 16 60
Render Output Units 8 48
Bus Type DDR3 GDDR5
Bus Width 128-bit 384-bit
Fab Process 40 nm 40 nm
Transistors 486 million 3000 million
Bus PCIe 2.0 PCIe x16
DirectX Version DirectX 10.1 DirectX 11
OpenGL Version OpenGL 3.2 OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the largest amount of information (in units of MB per second) that can be moved across the external memory interface in a second. The number is calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster 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 texture map elements (texels) that can be processed in one second. This number is worked out by multiplying the total texture units by the core 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 applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the clock 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 also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

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GeForce GT 315

Amazon.com

Check prices at:

GeForce GTX 480

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

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