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GeForce GTS 450 vs Radeon HD 3850 X2

Intro

The GeForce GTS 450 comes with core clock speeds of 783 MHz on the GPU, and 902 MHz on the 512 MB of GDDR5 memory. It features 192 SPUs as well as 32 Texture Address Units and 16 ROPs.

Compare those specifications to the Radeon HD 3850 X2, which has a core clock speed of 668 MHz and a GDDR3 memory frequency of 828 MHz. It also makes use of a 256-bit bus, and uses a 55 nm design. It features 320(64x5) SPUs, 16 TAUs, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon HD 3850 X2 will be 84% quicker than the GeForce GTS 450 overall, due to its greater data rate. (explain)

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

Texel Rate

The GeForce GTS 450 should be a bit (about 17%) better at anisotropic filtering than the Radeon HD 3850 X2. (explain)

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

Pixel Rate

The Radeon HD 3850 X2 should be a lot (approximately 71%) more effective at full screen anti-aliasing than the GeForce GTS 450, and will be able to handle higher screen resolutions without losing too much performance. (explain)

Radeon HD 3850 X2 21376 Mpixels/sec
GeForce GTS 450 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

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 Radeon HD 3850 X2
Manufacturer nVidia AMD
Year September 2010 Apr 4, 2008
Code Name GF106 RV670 PRO
Memory 512 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: Bandwidth is the largest amount of data (counted in MB per second) that can be transported across 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 type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, 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 number of texture map elements (texels) that can be applied per second. This is worked out by multiplying the total texture units by the core clock speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

Hide Prices

GeForce GTS 450

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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