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GeForce GTS 450 vs GeForce GTX 550 Ti

Intro

The GeForce GTS 450 comes with a GPU core clock speed of 783 MHz, and the 512 MB of GDDR5 RAM runs at 902 MHz through a 128-bit bus. It also is comprised of 192 Stream Processors, 32 TAUs, and 16 Raster Operation Units.

Compare those specifications to the GeForce GTX 550 Ti, which features GPU clock speed of 900 MHz, and 1024 MB of GDDR5 memory running at 1026 MHz through a 192-bit bus. It also features 192 SPUs, 32 Texture Address Units, and 24 Raster Operation Units.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 450 106 Watts
GeForce GTX 550 Ti 116 Watts
Difference: 10 Watts (9%)

Memory Bandwidth

The GeForce GTX 550 Ti should theoretically perform a lot faster than the GeForce GTS 450 in general. (explain)

GeForce GTX 550 Ti 98496 MB/sec
GeForce GTS 450 57728 MB/sec
Difference: 40768 (71%)

Texel Rate

The GeForce GTX 550 Ti should be a little bit (more or less 15%) better at texture filtering than the GeForce GTS 450. (explain)

GeForce GTX 550 Ti 28800 Mtexels/sec
GeForce GTS 450 25056 Mtexels/sec
Difference: 3744 (15%)

Pixel Rate

The GeForce GTX 550 Ti is much (about 72%) faster with regards to FSAA than the GeForce GTS 450, and should be capable of handling higher resolutions better. (explain)

GeForce GTX 550 Ti 21600 Mpixels/sec
GeForce GTS 450 12528 Mpixels/sec
Difference: 9072 (72%)

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

GeForce GTS 450

Amazon.com

GeForce GTX 550 Ti

Amazon.com

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

Model GeForce GTS 450 GeForce GTX 550 Ti
Manufacturer nVidia nVidia
Year September 2010 March 2011
Code Name GF106 GF116
Fab Process 40 nm 40 nm
Bus PCIe x16 PCIe 2.1 x16
Memory 512 MB 1024 MB
Core Speed 783 MHz 900 MHz
Shader Speed 1566 MHz 1800 MHz
Memory Speed 902 MHz (3608 MHz effective) 1026 MHz (4104 MHz effective)
Unified Shaders 192 192
Texture Mapping Units 32 32
Render Output Units 16 24
Bus Type GDDR5 GDDR5
Bus Width 128-bit 192-bit
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 4.1 OpenGL 4.1
Power (Max TDP) 106 watts 116 watts
Shader Model 5.0 5.0
Bandwidth 57728 MB/sec 98496 MB/sec
Texel Rate 25056 Mtexels/sec 28800 Mtexels/sec
Pixel Rate 12528 Mpixels/sec 21600 Mpixels/sec

Memory Bandwidth: Memory bandwidth is the largest amount of data (measured in megabytes per second) that can be transferred past the external memory interface in one second. It's worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This 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 video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

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