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GeForce GTX 480 vs GeForce GTX 650

Intro

The GeForce GTX 480 makes use of a 40 nm design. nVidia has set the core frequency at 700 MHz. The GDDR5 memory is set to run at a frequency of 924 MHz on this model. It features 480 SPUs as well as 60 Texture Address Units and 48 ROPs.

Compare that to the GeForce GTX 650, which has clock speeds of 1058 MHz on the GPU, and 1250 MHz on the 2048 MB of GDDR5 memory. It features 384 SPUs as well as 32 TAUs and 16 Rasterization Operator Units.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650 64 Watts
GeForce GTX 480 250 Watts
Difference: 186 Watts (291%)

Memory Bandwidth

Theoretically, the GeForce GTX 480 should perform quite a bit faster than the GeForce GTX 650 overall. (explain)

GeForce GTX 480 177408 MB/sec
GeForce GTX 650 80000 MB/sec
Difference: 97408 (122%)

Texel Rate

The GeForce GTX 480 should be quite a bit (more or less 24%) more effective at anisotropic filtering than the GeForce GTX 650. (explain)

GeForce GTX 480 42000 Mtexels/sec
GeForce GTX 650 33856 Mtexels/sec
Difference: 8144 (24%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTX 480 is superior to the GeForce GTX 650, by far. (explain)

GeForce GTX 480 33600 Mpixels/sec
GeForce GTX 650 16928 Mpixels/sec
Difference: 16672 (98%)

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

GeForce GTX 480

Amazon.com

GeForce GTX 650

Amazon.com

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

Model GeForce GTX 480 GeForce GTX 650
Manufacturer nVidia nVidia
Year March 2010 September 2012
Code Name GF100 GK107
Fab Process 40 nm 28 nm
Bus PCIe x16 PCIe 3.0 x16
Memory 1536 MB 2048 MB
Core Speed 700 MHz 1058 MHz
Shader Speed 1401 MHz 1058 MHz
Memory Speed 924 MHz (3696 MHz effective) 1250 MHz (5000 MHz effective)
Unified Shaders 480 384
Texture Mapping Units 60 32
Render Output Units 48 16
Bus Type GDDR5 GDDR5
Bus Width 384-bit 128-bit
DirectX Version DirectX 11 DirectX 11.0
OpenGL Version OpenGL 4.1 OpenGL 4.3
Power (Max TDP) 250 watts 64 watts
Shader Model 5.0 5.0
Bandwidth 177408 MB/sec 80000 MB/sec
Texel Rate 42000 Mtexels/sec 33856 Mtexels/sec
Pixel Rate 33600 Mpixels/sec 16928 Mpixels/sec

Memory Bandwidth: Bandwidth is the max amount of data (in units of MB per second) that can be transported past the external memory interface in one second. The number is calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This figure is calculated by multiplying the total number of texture units by the core speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a 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. The number is calculated by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output 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 potential to get to the maximum fill rate.

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