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GeForce GTX 275 vs GeForce GTX 465

Intro

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

Compare those specs to the GeForce GTX 465, which uses a 40 nm design. nVidia has set the core speed at 607 MHz. The GDDR5 RAM runs at a speed of 802 MHz on this model. It features 352 SPUs along with 44 TAUs and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 465 200 Watts
GeForce GTX 275 219 Watts
Difference: 19 Watts (10%)

Memory Bandwidth

In theory, the GeForce GTX 275 should be much faster than the GeForce GTX 465 in general. (explain)

GeForce GTX 275 127008 MB/sec
GeForce GTX 465 102592 MB/sec
Difference: 24416 (24%)

Texel Rate

The GeForce GTX 275 will be quite a bit (more or less 90%) more effective at anisotropic filtering than the GeForce GTX 465. (explain)

GeForce GTX 275 50640 Mtexels/sec
GeForce GTX 465 26708 Mtexels/sec
Difference: 23932 (90%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTX 465 is superior to the GeForce GTX 275, but it probably won't make a huge difference. (explain)

GeForce GTX 465 19424 Mpixels/sec
GeForce GTX 275 17724 Mpixels/sec
Difference: 1700 (10%)

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 275

Amazon.com

Check prices at:

GeForce GTX 465

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

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Model GeForce GTX 275 GeForce GTX 465
Manufacturer nVidia nVidia
Year April 9, 2009 May 2010
Code Name G200b GF100
Memory 896 MB 1024 MB
Core Speed 633 MHz 607 MHz
Memory Speed 2268 MHz 3208 MHz
Power (Max TDP) 219 watts 200 watts
Bandwidth 127008 MB/sec 102592 MB/sec
Texel Rate 50640 Mtexels/sec 26708 Mtexels/sec
Pixel Rate 17724 Mpixels/sec 19424 Mpixels/sec
Unified Shaders 240 352
Texture Mapping Units 80 44
Render Output Units 28 32
Bus Type GDDR3 GDDR5
Bus Width 448-bit 256-bit
Fab Process 55 nm 40 nm
Transistors 1400 million 3000 million
Bus PCIe x16 2.0 PCIe x16
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.1 OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the largest amount of data (counted in MB per second) that can be transported past the external memory interface in a second. The number is calculated by multiplying the bus width by its memory clock speed. In the case of DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster 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 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 graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

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

Display Prices

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GeForce GTX 275

Amazon.com

Check prices at:

GeForce GTX 465

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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