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GeForce GTS 450 vs Radeon HD 3850 256MB

Intro

The GeForce GTS 450 features a GPU clock speed of 783 MHz, and the 512 MB of GDDR5 memory is set to run at 902 MHz through a 128-bit bus. It also features 192 Stream Processors, 32 TAUs, and 16 ROPs.

Compare that to the Radeon HD 3850 256MB, which has GPU clock speed of 668 MHz, and 256 MB of GDDR3 RAM running at 828 MHz through a 256-bit bus. It also is comprised of 320(64x5) Stream Processors, 16 TAUs, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 3850 256MB 75 Watts
GeForce GTS 450 106 Watts
Difference: 31 Watts (41%)

Memory Bandwidth

Theoretically speaking, the GeForce GTS 450 should be 9% faster than the Radeon HD 3850 256MB in general, due to its higher bandwidth. (explain)

GeForce GTS 450 57728 MB/sec
Radeon HD 3850 256MB 52992 MB/sec
Difference: 4736 (9%)

Texel Rate

The GeForce GTS 450 should be much (about 134%) more effective at anisotropic filtering than the Radeon HD 3850 256MB. (explain)

GeForce GTS 450 25056 Mtexels/sec
Radeon HD 3850 256MB 10688 Mtexels/sec
Difference: 14368 (134%)

Pixel Rate

The GeForce GTS 450 will be a small bit (more or less 17%) faster with regards to anti-aliasing than the Radeon HD 3850 256MB, and able to handle higher screen resolutions without slowing down too much. (explain)

GeForce GTS 450 12528 Mpixels/sec
Radeon HD 3850 256MB 10688 Mpixels/sec
Difference: 1840 (17%)

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 3850 256MB

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 3850 256MB
Manufacturer nVidia AMD
Year September 2010 Nov 19, 2007
Code Name GF106 RV670 PRO
Memory 512 MB 256 MB
Core Speed 783 MHz 668 MHz
Memory Speed 3608 MHz 1656 MHz
Power (Max TDP) 106 watts 75 watts
Bandwidth 57728 MB/sec 52992 MB/sec
Texel Rate 25056 Mtexels/sec 10688 Mtexels/sec
Pixel Rate 12528 Mpixels/sec 10688 Mpixels/sec
Unified Shaders 192 320(64x5)
Texture Mapping Units 32 16
Render Output Units 16 16
Bus Type GDDR5 GDDR3
Bus Width 128-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 largest amount of data (counted in megabytes per second) that can be transferred across the external memory interface in a second. The number is worked out by multiplying the interface width by its memory clock speed. In the case of DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher 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 amount of texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total number of texture units by the core speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the card's clock speed. 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 many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

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GeForce GTS 450

Amazon.com

Check prices at:

Radeon HD 3850 256MB

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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