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GeForce GT 450 (OEM) vs Radeon HD 4870 2GB

Intro

The GeForce GT 450 (OEM) features a core clock speed of 790 MHz and a GDDR5 memory speed of 1000 MHz. It also uses a 192-bit bus, and makes use of a 40 nm design. It features 144 SPUs, 24 Texture Address Units, and 24 ROPs.

Compare those specs to the Radeon HD 4870 2GB, which uses a 55 nm design. AMD has set the core frequency at 750 MHz. The GDDR5 memory works at a speed of 900 MHz on this specific model. It features 800(160x5) SPUs along with 40 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 450 (OEM) 106 Watts
Radeon HD 4870 2GB 150 Watts
Difference: 44 Watts (42%)

Memory Bandwidth

The Radeon HD 4870 2GB, in theory, should perform a bit faster than the GeForce GT 450 (OEM) in general. (explain)

Radeon HD 4870 2GB 115200 MB/sec
GeForce GT 450 (OEM) 96000 MB/sec
Difference: 19200 (20%)

Texel Rate

The Radeon HD 4870 2GB will be quite a bit (approximately 58%) more effective at AF than the GeForce GT 450 (OEM). (explain)

Radeon HD 4870 2GB 30000 Mtexels/sec
GeForce GT 450 (OEM) 18960 Mtexels/sec
Difference: 11040 (58%)

Pixel Rate

The GeForce GT 450 (OEM) is much (about 58%) better at AA than the Radeon HD 4870 2GB, and should be able to handle higher screen resolutions without losing too much performance. (explain)

GeForce GT 450 (OEM) 18960 Mpixels/sec
Radeon HD 4870 2GB 12000 Mpixels/sec
Difference: 6960 (58%)

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 4870 2GB

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 4870 2GB
Manufacturer nVidia AMD
Year October 2010 Jun 25, 2008
Code Name GF106 RV770 XT
Memory 1536 MB 2048 MB
Core Speed 790 MHz 750 MHz
Memory Speed 4000 MHz 3600 MHz
Power (Max TDP) 106 watts 150 watts
Bandwidth 96000 MB/sec 115200 MB/sec
Texel Rate 18960 Mtexels/sec 30000 Mtexels/sec
Pixel Rate 18960 Mpixels/sec 12000 Mpixels/sec
Unified Shaders 144 800(160x5)
Texture Mapping Units 24 40
Render Output Units 24 16
Bus Type GDDR5 GDDR5
Bus Width 192-bit 256-bit
Fab Process 40 nm 55 nm
Transistors 1170 million 956 million
Bus PCIe x16 PCIe 2.0 x16
DirectX Version DirectX 11 DirectX 10.1
OpenGL Version OpenGL 4.1 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the maximum amount of data (in units of MB per second) that can be transferred past the external memory interface within a second. The number is worked out by multiplying the interface width by its memory clock speed. If it uses DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, 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 amount of texture map elements (texels) that are applied per second. This is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

Hide Prices

GeForce GT 450 (OEM)

Amazon.com

Check prices at:

Radeon HD 4870 2GB

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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