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GeForce GTS 450 vs Radeon HD 5870

Intro

The GeForce GTS 450 features a GPU core clock speed of 783 MHz, and the 512 MB of GDDR5 RAM is set to run at 902 MHz through a 128-bit bus. It also is comprised of 192 SPUs, 32 Texture Address Units, and 16 ROPs.

Compare all of that to the Radeon HD 5870, which has a clock frequency of 850 MHz and a GDDR5 memory speed of 1200 MHz. It also makes use of a 256-bit bus, and makes use of a 40 nm design. It features 1600(320x5) SPUs, 80 Texture Address Units, and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 450 106 Watts
Radeon HD 5870 188 Watts
Difference: 82 Watts (77%)

Memory Bandwidth

Theoretically, the Radeon HD 5870 should perform much faster than the GeForce GTS 450 overall. (explain)

Radeon HD 5870 153600 MB/sec
GeForce GTS 450 57728 MB/sec
Difference: 95872 (166%)

Texel Rate

The Radeon HD 5870 will be much (about 171%) better at texture filtering than the GeForce GTS 450. (explain)

Radeon HD 5870 68000 Mtexels/sec
GeForce GTS 450 25056 Mtexels/sec
Difference: 42944 (171%)

Pixel Rate

The Radeon HD 5870 should be much (about 117%) more effective at AA than the GeForce GTS 450, and also will be capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon HD 5870 27200 Mpixels/sec
GeForce GTS 450 12528 Mpixels/sec
Difference: 14672 (117%)

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 GTS 450

Amazon.com

Check prices at:

Radeon HD 5870

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 GTS 450 Radeon HD 5870
Manufacturer nVidia AMD
Year September 2010 September 23, 2009
Code Name GF106 Cypress XT
Memory 512 MB 1024 MB
Core Speed 783 MHz 850 MHz
Memory Speed 3608 MHz 4800 MHz
Power (Max TDP) 106 watts 188 watts
Bandwidth 57728 MB/sec 153600 MB/sec
Texel Rate 25056 Mtexels/sec 68000 Mtexels/sec
Pixel Rate 12528 Mpixels/sec 27200 Mpixels/sec
Unified Shaders 192 1600(320x5)
Texture Mapping Units 32 80
Render Output Units 16 32
Bus Type GDDR5 GDDR5
Bus Width 128-bit 256-bit
Fab Process 40 nm 40 nm
Transistors 1170 million 2154 million
Bus PCIe x16 PCIe 2.1 x16
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 4.1 OpenGL 3.2

Memory Bandwidth: Bandwidth is the max amount of information (in units of megabytes per second) that can be transferred across the external memory interface in one second. The number is calculated by multiplying the card's interface width by the speed of its memory. In the case of DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, 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 are applied in one second. This number is calculated by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the 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 most pixels the video card could 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 ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

Hide Prices

GeForce GTS 450

Amazon.com

Check prices at:

Radeon HD 5870

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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