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GeForce GTX 550 Ti vs Radeon HD 6450 (OEM) 1GB

Intro

The GeForce GTX 550 Ti features a core clock frequency of 900 MHz and a GDDR5 memory frequency of 1026 MHz. It also makes use of a 192-bit bus, and uses a 40 nm design. It is comprised of 192 SPUs, 32 TAUs, and 24 Raster Operation Units.

Compare all of that to the Radeon HD 6450 (OEM) 1GB, which comes with GPU clock speed of 750 MHz, and 1024 MB of GDDR5 RAM running at 900 MHz through a 64-bit bus. It also is comprised of 160 SPUs, 8 Texture Address Units, and 4 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6450 (OEM) 1GB 31 Watts
GeForce GTX 550 Ti 116 Watts
Difference: 85 Watts (274%)

Memory Bandwidth

Performance-wise, the GeForce GTX 550 Ti should in theory be quite a bit better than the Radeon HD 6450 (OEM) 1GB overall. (explain)

GeForce GTX 550 Ti 98496 MB/sec
Radeon HD 6450 (OEM) 1GB 28800 MB/sec
Difference: 69696 (242%)

Texel Rate

The GeForce GTX 550 Ti is a lot (more or less 380%) more effective at AF than the Radeon HD 6450 (OEM) 1GB. (explain)

GeForce GTX 550 Ti 28800 Mtexels/sec
Radeon HD 6450 (OEM) 1GB 6000 Mtexels/sec
Difference: 22800 (380%)

Pixel Rate

The GeForce GTX 550 Ti should be quite a bit (about 620%) faster with regards to anti-aliasing than the Radeon HD 6450 (OEM) 1GB, and will be capable of handling higher screen resolutions more effectively. (explain)

GeForce GTX 550 Ti 21600 Mpixels/sec
Radeon HD 6450 (OEM) 1GB 3000 Mpixels/sec
Difference: 18600 (620%)

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 GTX 550 Ti

Amazon.com

Radeon HD 6450 (OEM) 1GB

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

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Model GeForce GTX 550 Ti Radeon HD 6450 (OEM) 1GB
Manufacturer nVidia AMD
Year March 2011 February 2011
Code Name GF116 Caicos
Memory 1024 MB 1024 MB
Core Speed 900 MHz 750 MHz
Memory Speed 4104 MHz 3600 MHz
Power (Max TDP) 116 watts 31 watts
Bandwidth 98496 MB/sec 28800 MB/sec
Texel Rate 28800 Mtexels/sec 6000 Mtexels/sec
Pixel Rate 21600 Mpixels/sec 3000 Mpixels/sec
Unified Shaders 192 160
Texture Mapping Units 32 8
Render Output Units 24 4
Bus Type GDDR5 GDDR5
Bus Width 192-bit 64-bit
Fab Process 40 nm 40 nm
Transistors 1170 million 370 million
Bus PCIe 2.1 x16 PCIe 2.1 x16
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 4.1 OpenGL 4.1

Memory Bandwidth: Bandwidth is the largest amount of information (in units of megabytes per second) that can be moved across the external memory interface in a second. It is calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total amount 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 per second.

Pixel Rate: Pixel rate is the maximum number 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 Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on 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 reach the maximum fill rate.

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