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GeForce GTS 450 1GB vs Radeon HD 5870

Intro

The GeForce GTS 450 1GB features a core clock frequency of 783 MHz and a GDDR5 memory frequency of 902 MHz. It also uses a 128-bit memory bus, and uses a 40 nm design. It is made up of 192 SPUs, 32 TAUs, and 16 ROPs.

Compare that to the Radeon HD 5870, which makes use of a 40 nm design. AMD has clocked the core speed at 850 MHz. The GDDR5 memory works at a speed of 1200 MHz on this specific card. It features 1600(320x5) SPUs along with 80 TAUs and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 450 1GB 106 Watts
Radeon HD 5870 188 Watts
Difference: 82 Watts (77%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 5870 is 166% quicker than the GeForce GTS 450 1GB in general, due to its higher bandwidth. (explain)

Radeon HD 5870 153600 MB/sec
GeForce GTS 450 1GB 57728 MB/sec
Difference: 95872 (166%)

Texel Rate

The Radeon HD 5870 should be quite a bit (more or less 171%) faster with regards to anisotropic filtering than the GeForce GTS 450 1GB. (explain)

Radeon HD 5870 68000 Mtexels/sec
GeForce GTS 450 1GB 25056 Mtexels/sec
Difference: 42944 (171%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon HD 5870 is superior to the GeForce GTS 450 1GB, by far. (explain)

Radeon HD 5870 27200 Mpixels/sec
GeForce GTS 450 1GB 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 1GB

Amazon.com

Radeon HD 5870

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 GTS 450 1GB Radeon HD 5870
Manufacturer nVidia AMD
Year September 2010 September 23, 2009
Code Name GF106 Cypress XT
Memory 1024 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 largest amount of information (measured in MB per second) that can be transported over the external memory interface in a second. It is worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This 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 in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

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