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GeForce GTX 550 Ti vs Radeon R7 250

Intro

The GeForce GTX 550 Ti has clock speeds of 900 MHz on the GPU, and 1026 MHz on the 1024 MB of GDDR5 memory. It features 192 SPUs as well as 32 TAUs and 24 ROPs.

Compare those specs to the Radeon R7 250, which features GPU clock speed of 1000 MHz, and 1024 MB of GDDR5 memory running at 1150 MHz through a 128-bit bus. It also is comprised of 384 SPUs, 24 Texture Address Units, and 8 Raster Operation Units.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250 65 Watts
GeForce GTX 550 Ti 116 Watts
Difference: 51 Watts (78%)

Memory Bandwidth

The GeForce GTX 550 Ti should in theory perform much faster than the Radeon R7 250 overall. (explain)

GeForce GTX 550 Ti 98496 MB/sec
Radeon R7 250 73600 MB/sec
Difference: 24896 (34%)

Texel Rate

The GeForce GTX 550 Ti will be a small bit (about 20%) faster with regards to AF than the Radeon R7 250. (explain)

GeForce GTX 550 Ti 28800 Mtexels/sec
Radeon R7 250 24000 Mtexels/sec
Difference: 4800 (20%)

Pixel Rate

The GeForce GTX 550 Ti is quite a bit (about 170%) more effective at full screen anti-aliasing than the Radeon R7 250, and should be capable of handling higher screen resolutions more effectively. (explain)

GeForce GTX 550 Ti 21600 Mpixels/sec
Radeon R7 250 8000 Mpixels/sec
Difference: 13600 (170%)

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 GTX 550 Ti

Amazon.com

Radeon R7 250

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 GTX 550 Ti Radeon R7 250
Manufacturer nVidia AMD
Year March 2011 October 2013
Code Name GF116 Oland XT
Fab Process 40 nm 28 nm
Bus PCIe 2.1 x16 PCIe 3.0 x16
Memory 1024 MB 1024 MB
Core Speed 900 MHz 1000 MHz
Shader Speed 1800 MHz (N/A) MHz
Memory Speed 1026 MHz (4104 MHz effective) 1150 MHz (4600 MHz effective)
Unified Shaders 192 384
Texture Mapping Units 32 24
Render Output Units 24 8
Bus Type GDDR5 GDDR5
Bus Width 192-bit 128-bit
DirectX Version DirectX 11 DirectX 11.2
OpenGL Version OpenGL 4.1 OpenGL 4.3
Power (Max TDP) 116 watts 65 watts
Shader Model 5.0 5.0
Bandwidth 98496 MB/sec 73600 MB/sec
Texel Rate 28800 Mtexels/sec 24000 Mtexels/sec
Pixel Rate 21600 Mpixels/sec 8000 Mpixels/sec

Memory Bandwidth: Bandwidth is the largest amount of data (measured in MB per second) that can be transported past the external memory interface within a second. The number is calculated by multiplying the card's interface width by the speed of its memory. If the card has DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total texture units of the card by the core speed of the chip. The higher the texel rate, the better the graphics 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 number of pixels the video card could possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount 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 rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.

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