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GeForce GTX 470 vs GeForce GTX 650

Intro

The GeForce GTX 470 uses a 40 nm design. nVidia has clocked the core frequency at 607 MHz. The GDDR5 RAM runs at a frequency of 837 MHz on this model. It features 448 SPUs as well as 56 Texture Address Units and 40 Rasterization Operator Units.

Compare all that to the GeForce GTX 650, which features core speeds of 1058 MHz on the GPU, and 1250 MHz on the 2048 MB of GDDR5 RAM. It features 384 SPUs along with 32 Texture Address Units and 16 ROPs.

(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

Theoretically speaking, the GeForce GTX 470 should perform much faster than the GeForce GTX 650 in general. (explain)

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

Texel Rate

The GeForce GTX 470 should be a bit (about 0%) more effective at anisotropic filtering 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 high levels of AA is important to you, then the GeForce GTX 470 is a better choice, by far. (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

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

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 837 MHz (3348 MHz effective) 1250 MHz (5000 MHz effective)
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: Bandwidth is the largest amount of data (measured in megabytes per second) that can be moved past the external memory interface in a second. The number is worked out by multiplying the interface width by its memory clock speed. If it uses DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.

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