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GeForce GT 450 (OEM) vs Radeon HD 6870

Intro

The GeForce GT 450 (OEM) uses a 40 nm design. nVidia has set the core frequency at 790 MHz. The GDDR5 RAM works at a speed of 1000 MHz on this specific model. It features 144 SPUs as well as 24 TAUs and 24 Rasterization Operator Units.

Compare those specs to the Radeon HD 6870, which has core clock speeds of 900 MHz on the GPU, and 1050 MHz on the 1024 MB of GDDR5 memory. It features 1120 SPUs as well as 56 Texture Address Units and 32 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 450 (OEM) 106 Watts
Radeon HD 6870 151 Watts
Difference: 45 Watts (42%)

Memory Bandwidth

As far as performance goes, the Radeon HD 6870 should theoretically be a lot superior to the GeForce GT 450 (OEM) in general. (explain)

Radeon HD 6870 134400 MB/sec
GeForce GT 450 (OEM) 96000 MB/sec
Difference: 38400 (40%)

Texel Rate

The Radeon HD 6870 should be much (more or less 166%) faster with regards to texture filtering than the GeForce GT 450 (OEM). (explain)

Radeon HD 6870 50400 Mtexels/sec
GeForce GT 450 (OEM) 18960 Mtexels/sec
Difference: 31440 (166%)

Pixel Rate

The Radeon HD 6870 should be a lot (more or less 52%) better at anti-aliasing than the GeForce GT 450 (OEM), and will be able to handle higher resolutions more effectively. (explain)

Radeon HD 6870 28800 Mpixels/sec
GeForce GT 450 (OEM) 18960 Mpixels/sec
Difference: 9840 (52%)

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 GT 450 (OEM)

Amazon.com

Check prices at:

Radeon HD 6870

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 GT 450 (OEM) Radeon HD 6870
Manufacturer nVidia AMD
Year October 2010 October 2010
Code Name GF106 Barts XT
Memory 1536 MB 1024 MB
Core Speed 790 MHz 900 MHz
Memory Speed 4000 MHz 4200 MHz
Power (Max TDP) 106 watts 151 watts
Bandwidth 96000 MB/sec 134400 MB/sec
Texel Rate 18960 Mtexels/sec 50400 Mtexels/sec
Pixel Rate 18960 Mpixels/sec 28800 Mpixels/sec
Unified Shaders 144 1120
Texture Mapping Units 24 56
Render Output Units 24 32
Bus Type GDDR5 GDDR5
Bus Width 192-bit 256-bit
Fab Process 40 nm 40 nm
Transistors 1170 million 1700 million
Bus PCIe x16 PCIe x16
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 4.1 OpenGL 4.1

Memory Bandwidth: Bandwidth is the max amount of data (in units of MB per second) that can be moved past the external memory interface within a second. The number is worked out by multiplying the bus width by its memory speed. In the case of DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This figure is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher this number, the better the 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 the video card can possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs 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 rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

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GeForce GT 450 (OEM)

Amazon.com

Check prices at:

Radeon HD 6870

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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