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GeForce GTS 450 1GB vs Radeon HD 3850 X2

Intro

The GeForce GTS 450 1GB comes with a GPU clock speed of 783 MHz, and the 1024 MB of GDDR5 RAM runs at 902 MHz through a 128-bit bus. It also is made up of 192 Stream Processors, 32 TAUs, and 16 ROPs.

Compare those specs to the Radeon HD 3850 X2, which features a clock frequency of 668 MHz and a GDDR3 memory speed of 828 MHz. It also uses a 256-bit bus, and makes use of a 55 nm design. It is comprised of 320(64x5) SPUs, 16 Texture Address Units, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon HD 3850 X2 is 84% faster than the GeForce GTS 450 1GB in general, due to its greater bandwidth. (explain)

Radeon HD 3850 X2 105984 MB/sec
GeForce GTS 450 1GB 57728 MB/sec
Difference: 48256 (84%)

Texel Rate

The GeForce GTS 450 1GB will be just a bit (approximately 17%) better at anisotropic filtering than the Radeon HD 3850 X2. (explain)

GeForce GTS 450 1GB 25056 Mtexels/sec
Radeon HD 3850 X2 21376 Mtexels/sec
Difference: 3680 (17%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 3850 X2 is a better choice, and very much so. (explain)

Radeon HD 3850 X2 21376 Mpixels/sec
GeForce GTS 450 1GB 12528 Mpixels/sec
Difference: 8848 (71%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

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GeForce GTS 450 1GB

Amazon.com

Check prices at:

Radeon HD 3850 X2

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 3850 X2
Manufacturer nVidia AMD
Year September 2010 Apr 4, 2008
Code Name GF106 RV670 PRO
Memory 1024 MB 512 MB (x2)
Core Speed 783 MHz 668 MHz (x2)
Memory Speed 3608 MHz 1656 MHz (x2)
Power (Max TDP) 106 watts (Unknown) watts
Bandwidth 57728 MB/sec 105984 MB/sec
Texel Rate 25056 Mtexels/sec 21376 Mtexels/sec
Pixel Rate 12528 Mpixels/sec 21376 Mpixels/sec
Unified Shaders 192 320(64x5) (x2)
Texture Mapping Units 32 16 (x2)
Render Output Units 16 16 (x2)
Bus Type GDDR5 GDDR3
Bus Width 128-bit 256-bit (x2)
Fab Process 40 nm 55 nm
Transistors 1170 million (Unknown) million
Bus PCIe x16 PCIe 2.0 x16/(internal PCIe 1.1 x16)
DirectX Version DirectX 11 DirectX 10.1
OpenGL Version OpenGL 4.1 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the largest amount of information (in units of megabytes per second) that can be transferred past the external memory interface within a second. It's worked out by multiplying the bus width by its memory speed. If it uses DDR type memory, the result should be multiplied by 2 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 anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics 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 Raster Operations Pipelines 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 rate is also dependant 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 GTS 450 1GB

Amazon.com

Check prices at:

Radeon HD 3850 X2

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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