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GeForce GT 450 (OEM) vs GeForce GTX 650

Intro

The GeForce GT 450 (OEM) has core clock speeds of 790 MHz on the GPU, and 1000 MHz on the 1536 MB of GDDR5 memory. It features 144 SPUs as well as 24 TAUs and 24 ROPs.

Compare that to the GeForce GTX 650, which comes with GPU core speed of 1058 MHz, and 1024 MB of GDDR5 memory running at 1250 MHz through a 128-bit bus. It also is comprised of 384 SPUs, 32 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650 64 Watts
GeForce GT 450 (OEM) 106 Watts
Difference: 42 Watts (66%)

Memory Bandwidth

The GeForce GT 450 (OEM) should theoretically be just a bit faster than the GeForce GTX 650 in general. (explain)

GeForce GT 450 (OEM) 96000 MB/sec
GeForce GTX 650 80000 MB/sec
Difference: 16000 (20%)

Texel Rate

The GeForce GTX 650 is much (about 79%) faster with regards to AF than the GeForce GT 450 (OEM). (explain)

GeForce GTX 650 33856 Mtexels/sec
GeForce GT 450 (OEM) 18960 Mtexels/sec
Difference: 14896 (79%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GT 450 (OEM) is the winner, but it probably won't make a huge difference. (explain)

GeForce GT 450 (OEM) 18960 Mpixels/sec
GeForce GTX 650 16928 Mpixels/sec
Difference: 2032 (12%)

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 450 (OEM)

Amazon.com

Check prices at:

GeForce GTX 650

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

Display Specifications

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Model GeForce GT 450 (OEM) GeForce GTX 650
Manufacturer nVidia nVidia
Year October 2010 September 2012
Code Name GF106 GK107
Memory 1536 MB 1024 MB
Core Speed 790 MHz 1058 MHz
Memory Speed 4000 MHz 5000 MHz
Power (Max TDP) 106 watts 64 watts
Bandwidth 96000 MB/sec 80000 MB/sec
Texel Rate 18960 Mtexels/sec 33856 Mtexels/sec
Pixel Rate 18960 Mpixels/sec 16928 Mpixels/sec
Unified Shaders 144 384
Texture Mapping Units 24 32
Render Output Units 24 16
Bus Type GDDR5 GDDR5
Bus Width 192-bit 128-bit
Fab Process 40 nm 28 nm
Transistors 1170 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: Memory bandwidth is the max amount of information (in units of megabytes per second) that can be moved across the external memory interface in one second. The number is calculated by multiplying the interface width by its memory clock speed. In the case of DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher 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 number of texture map elements (texels) that can be applied in one second. This is worked out by multiplying the total amount of texture units by the core clock 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 processed in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out 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 fill rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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GeForce GT 450 (OEM)

Amazon.com

Check prices at:

GeForce GTX 650

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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