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GeForce GTX 470 vs GeForce GTX 650

Intro

The GeForce GTX 470 makes use of a 40 nm design. nVidia has clocked the core frequency at 607 MHz. The GDDR5 RAM works at a speed of 837 MHz on this particular model. It features 448 SPUs as well as 56 TAUs and 40 Rasterization Operator Units.

Compare all that to the GeForce GTX 650, which features a core clock speed of 1058 MHz and a GDDR5 memory speed of 1250 MHz. It also makes use of a 128-bit memory bus, and uses a 28 nm design. It is comprised of 384 SPUs, 32 Texture Address Units, and 16 ROPs.

Display Graphs

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(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650 64 Watts
GeForce GTX 470 215 Watts
Difference: 151 Watts (236%)

Memory Bandwidth

Performance-wise, the GeForce GTX 470 should in theory be a lot superior to the GeForce GTX 650 overall. (explain)

GeForce GTX 470 133920 MB/sec
GeForce GTX 650 80000 MB/sec
Difference: 53920 (67%)

Texel Rate

The GeForce GTX 470 is a small bit (more or less 0%) better at AF than the GeForce GTX 650. (explain)

GeForce GTX 470 33992 Mtexels/sec
GeForce GTX 650 33856 Mtexels/sec
Difference: 136 (0%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce GTX 470 is a better choice, and very much so. (explain)

GeForce GTX 470 24280 Mpixels/sec
GeForce GTX 650 16928 Mpixels/sec
Difference: 7352 (43%)

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 GTX 470

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

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Model GeForce GTX 470 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 1280 MB 2048 MB
Core Speed 607 MHz 1058 MHz
Shader Speed 1215 MHz 1058 MHz
Memory Speed 3348 MHz 5000 MHz
Unified Shaders 448 384
Texture Mapping Units 56 32
Render Output Units 40 16
Bus Type GDDR5 GDDR5
Bus Width 320-bit 128-bit
DirectX Version DirectX 11 DirectX 11.0
OpenGL Version OpenGL 4.1 OpenGL 4.3
Power (Max TDP) 215 watts 64 watts
Shader Model 5.0 5.0
Bandwidth 133920 MB/sec 80000 MB/sec
Texel Rate 33992 Mtexels/sec 33856 Mtexels/sec
Pixel Rate 24280 Mpixels/sec 16928 Mpixels/sec

Memory Bandwidth: Memory bandwidth is the largest amount of information (measured in MB per second) that can be transferred over the external memory interface in a second. It's worked out by multiplying the card's interface width by its memory speed. If the card has DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's 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 number of texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the video card will be at handling 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 the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends 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.

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