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GeForce GTX 275 vs GeForce GTX 280

Intro

The GeForce GTX 275 has clock speeds of 633 MHz on the GPU, and 1134 MHz on the 896 MB of GDDR3 RAM. It features 240 SPUs as well as 80 Texture Address Units and 28 ROPs.

Compare that to the GeForce GTX 280, which comes with a core clock frequency of 602 MHz and a GDDR3 memory frequency of 1107 MHz. It also makes use of a 512-bit bus, and makes use of a 65 nm design. It features 240 SPUs, 80 Texture Address Units, and 32 ROPs.

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

Theoretically speaking, the GeForce GTX 280 should perform a little 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 a little bit (about 5%) better at AF than the GeForce GTX 280. (explain)

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

Pixel Rate

The GeForce GTX 280 will be a little bit (about 9%) faster with regards to anti-aliasing than the GeForce GTX 275, and able to handle higher screen resolutions more effectively. (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: Memory bandwidth is the maximum amount of data (counted in megabytes per second) that can be transported across the external memory interface in one second. It is worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential 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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