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GeForce GTX 275 vs Radeon HD 7870 XT

Intro

The GeForce GTX 275 features core speeds of 633 MHz on the GPU, and 1134 MHz on the 896 MB of GDDR3 memory. It features 240 SPUs as well as 80 Texture Address Units and 28 Rasterization Operator Units.

Compare those specifications to the Radeon HD 7870 XT, which has GPU clock speed of 925 MHz, and 2048 MB of GDDR5 memory set to run at 1500 MHz through a 256-bit bus. It also is comprised of 1536 Stream Processors, 96 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7870 XT 185 Watts
GeForce GTX 275 219 Watts
Difference: 34 Watts (18%)

Memory Bandwidth

The Radeon HD 7870 XT should in theory be a lot faster than the GeForce GTX 275 in general. (explain)

Radeon HD 7870 XT 192000 MB/sec
GeForce GTX 275 127008 MB/sec
Difference: 64992 (51%)

Texel Rate

The Radeon HD 7870 XT is quite a bit (about 75%) more effective at anisotropic filtering than the GeForce GTX 275. (explain)

Radeon HD 7870 XT 88800 Mtexels/sec
GeForce GTX 275 50640 Mtexels/sec
Difference: 38160 (75%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon HD 7870 XT is the winner, by far. (explain)

Radeon HD 7870 XT 29600 Mpixels/sec
GeForce GTX 275 17724 Mpixels/sec
Difference: 11876 (67%)

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:

Radeon HD 7870 XT

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 Radeon HD 7870 XT
Manufacturer nVidia AMD
Year April 9, 2009 November 2012
Code Name G200b Tahiti LE
Memory 896 MB 2048 MB
Core Speed 633 MHz 925 MHz
Memory Speed 2268 MHz 6000 MHz
Power (Max TDP) 219 watts 185 watts
Bandwidth 127008 MB/sec 192000 MB/sec
Texel Rate 50640 Mtexels/sec 88800 Mtexels/sec
Pixel Rate 17724 Mpixels/sec 29600 Mpixels/sec
Unified Shaders 240 1536
Texture Mapping Units 80 96
Render Output Units 28 32
Bus Type GDDR3 GDDR5
Bus Width 448-bit 256-bit
Fab Process 55 nm 28 nm
Transistors 1400 million 4313 million
Bus PCIe x16 2.0 PCIe 3.0 x16
DirectX Version DirectX 10 DirectX 11.1
OpenGL Version OpenGL 3.1 OpenGL 4.3

Memory Bandwidth: 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 its memory clock speed. In the case of DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number 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 drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory 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:

Radeon HD 7870 XT

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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