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GeForce GT 450 (OEM) vs Radeon HD 3870 512MB

Intro

The GeForce GT 450 (OEM) makes use of a 40 nm design. nVidia has clocked the core frequency at 790 MHz. The GDDR5 RAM is set to run at a speed of 1000 MHz on this model. It features 144 SPUs along with 24 TAUs and 24 Rasterization Operator Units.

Compare those specs to the Radeon HD 3870 512MB, which has GPU clock speed of 775 MHz, and 512 MB of GDDR3 RAM set to run at 900 MHz through a 256-bit bus. It also is made up of 320(64x5) Stream Processors, 16 TAUs, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Both cards have the same power consumption.

Memory Bandwidth

As far as performance goes, the GeForce GT 450 (OEM) should theoretically be a lot better than the Radeon HD 3870 512MB in general. (explain)

GeForce GT 450 (OEM) 96000 MB/sec
Radeon HD 3870 512MB 57600 MB/sec
Difference: 38400 (67%)

Texel Rate

The GeForce GT 450 (OEM) will be much (more or less 53%) faster with regards to AF than the Radeon HD 3870 512MB. (explain)

GeForce GT 450 (OEM) 18960 Mtexels/sec
Radeon HD 3870 512MB 12400 Mtexels/sec
Difference: 6560 (53%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GT 450 (OEM) is a better choice, by a large margin. (explain)

GeForce GT 450 (OEM) 18960 Mpixels/sec
Radeon HD 3870 512MB 12400 Mpixels/sec
Difference: 6560 (53%)

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 3870 512MB

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 3870 512MB
Manufacturer nVidia AMD
Year October 2010 Nov 19, 2007
Code Name GF106 RV670 XT
Memory 1536 MB 512 MB
Core Speed 790 MHz 775 MHz
Memory Speed 4000 MHz 1800 MHz
Power (Max TDP) 106 watts 106 watts
Bandwidth 96000 MB/sec 57600 MB/sec
Texel Rate 18960 Mtexels/sec 12400 Mtexels/sec
Pixel Rate 18960 Mpixels/sec 12400 Mpixels/sec
Unified Shaders 144 320(64x5)
Texture Mapping Units 24 16
Render Output Units 24 16
Bus Type GDDR5 GDDR3
Bus Width 192-bit 256-bit
Fab Process 40 nm 55 nm
Transistors 1170 million (Unknown) million
Bus PCIe x16 PCIe 2.0 x16/AGP 8x
DirectX Version DirectX 11 DirectX 10.1
OpenGL Version OpenGL 4.1 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the maximum amount of information (in units of MB per second) that can be transferred across the external memory interface in one second. It is calculated by multiplying the interface width by its memory clock speed. If it uses DDR type RAM, the result should be multiplied by 2 once again. If 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 high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total texture units of the card by the core speed of the chip. The higher 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 that the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

Hide Prices

GeForce GT 450 (OEM)

Amazon.com

Check prices at:

Radeon HD 3870 512MB

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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