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GeForce GTX 275 vs Radeon HD 5850

Intro

The GeForce GTX 275 has a GPU clock speed of 633 MHz, and the 896 MB of GDDR3 RAM runs at 1134 MHz through a 448-bit bus. It also is made up of 240 Stream Processors, 80 Texture Address Units, and 28 Raster Operation Units.

Compare all that to the Radeon HD 5850, which uses a 40 nm design. AMD has set the core speed at 725 MHz. The GDDR5 RAM runs at a frequency of 1000 MHz on this particular model. It features 1440(288x5) SPUs as well as 72 TAUs and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5850 151 Watts
GeForce GTX 275 219 Watts
Difference: 68 Watts (45%)

Memory Bandwidth

Theoretically, the Radeon HD 5850 should perform a bit faster than the GeForce GTX 275 overall. (explain)

Radeon HD 5850 128000 MB/sec
GeForce GTX 275 127008 MB/sec
Difference: 992 (1%)

Texel Rate

The Radeon HD 5850 is just a bit (approximately 3%) faster with regards to anisotropic filtering than the GeForce GTX 275. (explain)

Radeon HD 5850 52200 Mtexels/sec
GeForce GTX 275 50640 Mtexels/sec
Difference: 1560 (3%)

Pixel Rate

The Radeon HD 5850 should be a lot (more or less 31%) faster with regards to AA than the GeForce GTX 275, and should be capable of handling higher screen resolutions without losing too much performance. (explain)

Radeon HD 5850 23200 Mpixels/sec
GeForce GTX 275 17724 Mpixels/sec
Difference: 5476 (31%)

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 5850

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 5850
Manufacturer nVidia AMD
Year April 9, 2009 September 30, 2009
Code Name G200b Cypress PRO
Memory 896 MB 1024 MB
Core Speed 633 MHz 725 MHz
Memory Speed 2268 MHz 4000 MHz
Power (Max TDP) 219 watts 151 watts
Bandwidth 127008 MB/sec 128000 MB/sec
Texel Rate 50640 Mtexels/sec 52200 Mtexels/sec
Pixel Rate 17724 Mpixels/sec 23200 Mpixels/sec
Unified Shaders 240 1440(288x5)
Texture Mapping Units 80 72
Render Output Units 28 32
Bus Type GDDR3 GDDR5
Bus Width 448-bit 256-bit
Fab Process 55 nm 40 nm
Transistors 1400 million 2154 million
Bus PCIe x16 2.0 PCIe 2.1 x16
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.1 OpenGL 3.2

Memory Bandwidth: Memory bandwidth is the largest amount of information (counted in megabytes per second) that can be transferred past the external memory interface in one second. It's calculated by multiplying the bus width by its memory speed. If the card has DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This number is calculated by multiplying the total number of texture units of the card by the core 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 per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called 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 memory bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

Hide Prices

GeForce GTX 275

Amazon.com

Check prices at:

Radeon HD 5850

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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