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GeForce GTS 450 1GB vs Radeon HD 4870 1GB

Intro

The GeForce GTS 450 1GB features core clock speeds of 783 MHz on the GPU, and 902 MHz on the 1024 MB of GDDR5 memory. It features 192 SPUs as well as 32 TAUs and 16 ROPs.

Compare all of that to the Radeon HD 4870 1GB, which uses a 55 nm design. AMD has set the core speed at 750 MHz. The GDDR5 RAM works at a frequency of 900 MHz on this specific model. It features 800(160x5) SPUs along with 40 TAUs and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 450 1GB 106 Watts
Radeon HD 4870 1GB 150 Watts
Difference: 44 Watts (42%)

Memory Bandwidth

In theory, the Radeon HD 4870 1GB should be 100% quicker than the GeForce GTS 450 1GB overall, because of its higher data rate. (explain)

Radeon HD 4870 1GB 115200 MB/sec
GeForce GTS 450 1GB 57728 MB/sec
Difference: 57472 (100%)

Texel Rate

The Radeon HD 4870 1GB should be a small bit (more or less 20%) better at texture filtering than the GeForce GTS 450 1GB. (explain)

Radeon HD 4870 1GB 30000 Mtexels/sec
GeForce GTS 450 1GB 25056 Mtexels/sec
Difference: 4944 (20%)

Pixel Rate

The GeForce GTS 450 1GB will be a little bit (about 4%) more effective at full screen anti-aliasing than the Radeon HD 4870 1GB, and also capable of handling higher screen resolutions more effectively. (explain)

GeForce GTS 450 1GB 12528 Mpixels/sec
Radeon HD 4870 1GB 12000 Mpixels/sec
Difference: 528 (4%)

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

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Radeon HD 4870 1GB

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 1GB Radeon HD 4870 1GB
Manufacturer nVidia AMD
Year September 2010 Jun 25, 2008
Code Name GF106 RV770 XT
Memory 1024 MB 1024 MB
Core Speed 783 MHz 750 MHz
Memory Speed 3608 MHz 3600 MHz
Power (Max TDP) 106 watts 150 watts
Bandwidth 57728 MB/sec 115200 MB/sec
Texel Rate 25056 Mtexels/sec 30000 Mtexels/sec
Pixel Rate 12528 Mpixels/sec 12000 Mpixels/sec
Unified Shaders 192 800(160x5)
Texture Mapping Units 32 40
Render Output Units 16 16
Bus Type GDDR5 GDDR5
Bus Width 128-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: Bandwidth is the largest amount of information (counted in megabytes per second) that can be transported past the external memory interface within a second. It's calculated by multiplying the interface width by its memory speed. If it uses DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This number is calculated by multiplying the total texture units by the core clock speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the the card's 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 rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

Hide Prices

GeForce GTS 450 1GB

Amazon.com

Check prices at:

Radeon HD 4870 1GB

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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