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GeForce GTX 550 Ti vs Radeon R7 250

Intro

The GeForce GTX 550 Ti has a core clock speed of 900 MHz and a GDDR5 memory speed of 1026 MHz. It also features 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.

Compare all that to the Radeon R7 250, which features a GPU core clock speed of 1000 MHz, and 1024 MB of GDDR5 RAM running at 1150 MHz through a 128-bit bus. It also is made up of 384 Stream Processors, 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

Theoretically speaking, the GeForce GTX 550 Ti should perform quite a bit faster than the Radeon R7 250 in general. (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 little bit (about 20%) better at texture filtering 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 will be a lot (about 170%) faster with regards to full screen anti-aliasing than the Radeon R7 250, and also 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: Memory bandwidth is the maximum amount of information (counted in MB per second) that can be transferred across the external memory interface in a second. It is calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high 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 texture units by the core speed of the chip. The better the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

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