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GeForce GT 450 (OEM) vs GeForce GTX 275

Intro

The GeForce GT 450 (OEM) features clock speeds of 790 MHz on the GPU, and 1000 MHz on the 1536 MB of GDDR5 RAM. It features 144 SPUs as well as 24 Texture Address Units and 24 ROPs.

Compare all of that to the GeForce GTX 275, which uses a 55 nm design. nVidia has clocked the core frequency at 633 MHz. The GDDR3 RAM works at a frequency of 1134 MHz on this particular card. It features 240 SPUs as well as 80 Texture Address Units and 28 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 450 (OEM) 106 Watts
GeForce GTX 275 219 Watts
Difference: 113 Watts (107%)

Memory Bandwidth

In theory, the GeForce GTX 275 should perform a lot faster than the GeForce GT 450 (OEM) overall. (explain)

GeForce GTX 275 127008 MB/sec
GeForce GT 450 (OEM) 96000 MB/sec
Difference: 31008 (32%)

Texel Rate

The GeForce GTX 275 should be quite a bit (approximately 167%) faster with regards to anisotropic filtering than the GeForce GT 450 (OEM). (explain)

GeForce GTX 275 50640 Mtexels/sec
GeForce GT 450 (OEM) 18960 Mtexels/sec
Difference: 31680 (167%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce GT 450 (OEM) is superior to the GeForce GTX 275, not by a very large margin though. (explain)

GeForce GT 450 (OEM) 18960 Mpixels/sec
GeForce GTX 275 17724 Mpixels/sec
Difference: 1236 (7%)

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

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GeForce GTX 275

Amazon.com

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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 275
Manufacturer nVidia nVidia
Year October 2010 April 9, 2009
Code Name GF106 G200b
Memory 1536 MB 896 MB
Core Speed 790 MHz 633 MHz
Memory Speed 4000 MHz 2268 MHz
Power (Max TDP) 106 watts 219 watts
Bandwidth 96000 MB/sec 127008 MB/sec
Texel Rate 18960 Mtexels/sec 50640 Mtexels/sec
Pixel Rate 18960 Mpixels/sec 17724 Mpixels/sec
Unified Shaders 144 240
Texture Mapping Units 24 80
Render Output Units 24 28
Bus Type GDDR5 GDDR3
Bus Width 192-bit 448-bit
Fab Process 40 nm 55 nm
Transistors 1170 million 1400 million
Bus PCIe x16 PCIe x16 2.0
DirectX Version DirectX 11 DirectX 10
OpenGL Version OpenGL 4.1 OpenGL 3.1

Memory Bandwidth: Bandwidth is the max amount of information (measured in megabytes per second) that can be moved over the external memory interface in a second. It is calculated by multiplying the card's interface width by the speed of its memory. In the case of DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen 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 higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

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GeForce GT 450 (OEM)

Amazon.com

Check prices at:

GeForce GTX 275

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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