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GeForce GTS 450 vs Radeon HD 4850 2GB

Intro

The GeForce GTS 450 features a GPU clock speed of 783 MHz, and the 512 MB of GDDR5 memory runs at 902 MHz through a 128-bit bus. It also is made up of 192 Stream Processors, 32 Texture Address Units, and 16 ROPs.

Compare all that to the Radeon HD 4850 2GB, which features a GPU core clock speed of 625 MHz, and 2048 MB of GDDR4 RAM running at 993 MHz through a 256-bit bus. It also is comprised of 800(160x5) SPUs, 40 TAUs, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 450 106 Watts
Radeon HD 4850 2GB 110 Watts
Difference: 4 Watts (4%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 4850 2GB should perform just a bit faster than the GeForce GTS 450 overall. (explain)

Radeon HD 4850 2GB 63552 MB/sec
GeForce GTS 450 57728 MB/sec
Difference: 5824 (10%)

Texel Rate

The GeForce GTS 450 is a little bit (more or less 0%) more effective at texture filtering than the Radeon HD 4850 2GB. (explain)

GeForce GTS 450 25056 Mtexels/sec
Radeon HD 4850 2GB 25000 Mtexels/sec
Difference: 56 (0%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GTS 450 is a better choice, and very much so. (explain)

GeForce GTS 450 12528 Mpixels/sec
Radeon HD 4850 2GB 10000 Mpixels/sec
Difference: 2528 (25%)

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

Amazon.com

Check prices at:

Radeon HD 4850 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 GTS 450 Radeon HD 4850 2GB
Manufacturer nVidia AMD
Year September 2010 Jun 25, 2008
Code Name GF106 RV770 PRO
Memory 512 MB 2048 MB
Core Speed 783 MHz 625 MHz
Memory Speed 3608 MHz 1986 MHz
Power (Max TDP) 106 watts 110 watts
Bandwidth 57728 MB/sec 63552 MB/sec
Texel Rate 25056 Mtexels/sec 25000 Mtexels/sec
Pixel Rate 12528 Mpixels/sec 10000 Mpixels/sec
Unified Shaders 192 800(160x5)
Texture Mapping Units 32 40
Render Output Units 16 16
Bus Type GDDR5 GDDR4
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: Memory bandwidth is the max amount of data (measured in megabytes per second) that can be moved over the external memory interface in one second. It is calculated by multiplying the card's interface width by the speed of its memory. In the case of DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

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

Display Prices

Hide Prices

GeForce GTS 450

Amazon.com

Check prices at:

Radeon HD 4850 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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