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GeForce GTX 480 vs GeForce GTX 650


Intro

The GeForce GTX 480 features core clock speeds of 700 MHz on the GPU, and 924 MHz on the 1536 MB of GDDR5 RAM. It features 480 SPUs along with 60 Texture Address Units and 48 Rasterization Operator Units.

Compare all of that to the GeForce GTX 650, which makes use of a 28 nm design. nVidia has set the core frequency at 1058 MHz. The GDDR5 memory runs at a frequency of 1250 MHz on this particular model. It features 384 SPUs along with 32 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

GeForce GTX 480 3650 points
GeForce GTX 650 2270 points
Difference: 1380 (61%)

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

As far as performance goes, the GeForce GTX 480 should theoretically be a lot better 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 (approximately 24%) more effective at AF 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 a better choice, 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

GeForce GTX 650

Specifications

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Model GeForce GTX 480 GeForce GTX 650
Manufacturer nVidia nVidia
Year March 2010 September 2012
Code Name GF100 GK107
Memory 1536 MB 1024 MB
Core Speed 700 MHz 1058 MHz
Memory Speed 3696 MHz 5000 MHz
Power (Max TDP) 250 watts 64 watts
Bandwidth 177408 MB/sec 80000 MB/sec
Texel Rate 42000 Mtexels/sec 33856 Mtexels/sec
Pixel Rate 33600 Mpixels/sec 16928 Mpixels/sec
Unified Shaders 480 384
Texture Mapping Units 60 32
Render Output Units 48 16
Bus Type GDDR5 GDDR5
Bus Width 384-bit 128-bit
Fab Process 40 nm 28 nm
Transistors 3000 million 1300 million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 11.0
OpenGL Version OpenGL 4.1 OpenGL 4.3

Memory Bandwidth: Bandwidth is the max amount of information (measured in MB per second) that can be transported over the external memory interface in a second. It is calculated by multiplying the bus width by its memory speed. If the card has DDR memory, it must be multiplied by 2 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 AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This 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 handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.

GeForce GTX 480

GeForce GTX 650

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