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GeForce GTX 280 vs Radeon HD 5770


Intro

The GeForce GTX 280 features a core clock speed of 602 MHz and a GDDR3 memory frequency of 1107 MHz. It also makes use of a 512-bit bus, and uses a 65 nm design. It is made up of 240 SPUs, 80 Texture Address Units, and 32 ROPs.

Compare all that to the Radeon HD 5770, which comes with a core clock speed of 850 MHz and a GDDR5 memory frequency of 1200 MHz. It also makes use of a 128-bit bus, and uses a 40 nm design. It features 800(160x5) SPUs, 40 Texture Address Units, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5770 108 Watts
GeForce GTX 280 236 Watts
Difference: 128 Watts (119%)

Memory Bandwidth

Performance-wise, the GeForce GTX 280 should theoretically be much better than the Radeon HD 5770 in general. (explain)

GeForce GTX 280 141696 MB/sec
Radeon HD 5770 76800 MB/sec
Difference: 64896 (85%)

Texel Rate

The GeForce GTX 280 will be a lot (about 42%) faster with regards to AF than the Radeon HD 5770. (explain)

GeForce GTX 280 48160 Mtexels/sec
Radeon HD 5770 34000 Mtexels/sec
Difference: 14160 (42%)

Pixel Rate

The GeForce GTX 280 is much (more or less 42%) more effective at AA than the Radeon HD 5770, and also will be able to handle higher resolutions better. (explain)

GeForce GTX 280 19264 Mpixels/sec
Radeon HD 5770 13600 Mpixels/sec
Difference: 5664 (42%)

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 280

Amazon.com

Radeon HD 5770

Amazon.com

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 280 Radeon HD 5770
Manufacturer nVidia AMD
Year June 17, 2008 October 13, 2009
Code Name G200 Juniper XT
Memory 1024 MB 1024 MB
Core Speed 602 MHz 850 MHz
Memory Speed 2214 MHz 4800 MHz
Power (Max TDP) 236 watts 108 watts
Bandwidth 141696 MB/sec 76800 MB/sec
Texel Rate 48160 Mtexels/sec 34000 Mtexels/sec
Pixel Rate 19264 Mpixels/sec 13600 Mpixels/sec
Unified Shaders 240 800(160x5)
Texture Mapping Units 80 40
Render Output Units 32 16
Bus Type GDDR3 GDDR5
Bus Width 512-bit 128-bit
Fab Process 65 nm 40 nm
Transistors 1400 million 1040 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 maximum amount of data (measured in megabytes per second) that can be moved over the external memory interface within a second. It is calculated by multiplying the card's interface width by its memory speed. In the case of DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This figure is worked out 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 texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on 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 ability to get to the maximum fill rate.

Display Prices

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GeForce GTX 280

Amazon.com

Radeon HD 5770

Amazon.com

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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