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GeForce GTX 275 vs GeForce GTX 280

Intro

The GeForce GTX 275 has a clock speed of 633 MHz and a GDDR3 memory frequency of 1134 MHz. It also uses a 448-bit memory bus, and makes use of a 55 nm design. It features 240 SPUs, 80 Texture Address Units, and 28 ROPs.

Compare those specifications to the GeForce GTX 280, which uses a 65 nm design. nVidia has set the core speed at 602 MHz. The GDDR3 RAM works at a frequency of 1107 MHz on this model. It features 240 SPUs along with 80 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 275 219 Watts
GeForce GTX 280 236 Watts
Difference: 17 Watts (8%)

Memory Bandwidth

The GeForce GTX 280 should theoretically be a bit faster than the GeForce GTX 275 in general. (explain)

GeForce GTX 280 141696 MB/sec
GeForce GTX 275 127008 MB/sec
Difference: 14688 (12%)

Texel Rate

The GeForce GTX 275 is just a bit (more or less 5%) more effective at texture filtering than the GeForce GTX 280. (explain)

GeForce GTX 275 50640 Mtexels/sec
GeForce GTX 280 48160 Mtexels/sec
Difference: 2480 (5%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 280 is the winner, but it probably won't make a huge difference. (explain)

GeForce GTX 280 19264 Mpixels/sec
GeForce GTX 275 17724 Mpixels/sec
Difference: 1540 (9%)

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 280

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 280
Manufacturer nVidia nVidia
Year April 9, 2009 June 17, 2008
Code Name G200b G200
Memory 896 MB 1024 MB
Core Speed 633 MHz 602 MHz
Memory Speed 2268 MHz 2214 MHz
Power (Max TDP) 219 watts 236 watts
Bandwidth 127008 MB/sec 141696 MB/sec
Texel Rate 50640 Mtexels/sec 48160 Mtexels/sec
Pixel Rate 17724 Mpixels/sec 19264 Mpixels/sec
Unified Shaders 240 240
Texture Mapping Units 80 80
Render Output Units 28 32
Bus Type GDDR3 GDDR3
Bus Width 448-bit 512-bit
Fab Process 55 nm 65 nm
Transistors 1400 million 1400 million
Bus PCIe x16 2.0 PCIe x16 2.0
DirectX Version DirectX 10 DirectX 10
OpenGL Version OpenGL 3.1 OpenGL 3.1

Memory Bandwidth: Bandwidth is the largest amount of information (counted in MB per second) that can be transferred over the external memory interface in a second. It is calculated by multiplying the interface width by its memory clock speed. If the card has DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This number is calculated by multiplying the total texture units of the card by the core speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

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GeForce GTX 275

Amazon.com

Check prices at:

GeForce GTX 280

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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