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GeForce GTX 275 vs GeForce GTX 280

Intro

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

Compare all of that to the GeForce GTX 280, which makes use of a 65 nm design. nVidia has clocked the core frequency at 602 MHz. The GDDR3 RAM runs at a frequency of 1107 MHz on this specific model. It features 240 SPUs along with 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

In theory, the GeForce GTX 280 should be a little bit faster than the GeForce GTX 275 overall. (explain)

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

Texel Rate

The GeForce GTX 275 will be a little bit (more or less 5%) faster with regards to 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 (more or less 9%) better at full screen anti-aliasing than the GeForce GTX 275, and will be able to handle higher resolutions better. (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

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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

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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 largest amount of data (counted in megabytes per second) that can be moved past the external memory interface in one second. The number is worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster 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 texture map elements (texels) that are applied in one second. This figure is calculated by multiplying the total number of texture units by the core speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends 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

Hide Prices

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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