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GeForce GTS 450 vs GeForce GTX 550 Ti


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 RAM. It features 192 SPUs as well as 32 Texture Address Units and 16 ROPs.

Compare all of that to the GeForce GTX 550 Ti, which comes with a clock frequency of 900 MHz and a GDDR5 memory speed of 1026 MHz. It also makes use of a 192-bit memory bus, and makes use of a 40 nm design. It is comprised of 192 SPUs, 32 Texture Address Units, and 24 Raster Operation Units.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

GeForce GTX 550 Ti 1910 points
GeForce GTS 450 1460 points
Difference: 450 (31%)

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

Theoretically speaking, the GeForce GTX 550 Ti should be 71% quicker than the GeForce GTS 450 overall, due to its higher bandwidth. (explain)

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

Texel Rate

The GeForce GTX 550 Ti is a little bit (approximately 15%) more effective at anisotropic 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 will be a lot (more or less 72%) better at full screen anti-aliasing than the GeForce GTS 450, and also should be capable of handling higher resolutions while still performing well. (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

GeForce GTX 550 Ti

Specifications

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Model GeForce GTS 450 GeForce GTX 550 Ti
Manufacturer nVidia nVidia
Year September 2010 March 2011
Code Name GF106 GF116
Memory 512 MB 1024 MB
Core Speed 783 MHz 900 MHz
Memory Speed 3608 MHz 4104 MHz
Power (Max TDP) 106 watts 116 watts
Bandwidth 57728 MB/sec 98496 MB/sec
Texel Rate 25056 Mtexels/sec 28800 Mtexels/sec
Pixel Rate 12528 Mpixels/sec 21600 Mpixels/sec
Unified Shaders 192 192
Texture Mapping Units 32 32
Render Output Units 16 24
Bus Type GDDR5 GDDR5
Bus Width 128-bit 192-bit
Fab Process 40 nm 40 nm
Transistors 1170 million 1170 million
Bus PCIe x16 PCIe 2.1 x16
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 4.1 OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the largest amount of information (counted in MB per second) that can be transported over the external memory interface in a second. The number is calculated by multiplying the interface width by its memory clock speed. In the case of DDR memory, the result 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, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The better this number, the better the video card will be at handling 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 chip could possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

GeForce GTS 450

GeForce GTX 550 Ti

Comments

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