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GeForce GTX 550 Ti vs Radeon R7 250

Intro

The GeForce GTX 550 Ti makes use of a 40 nm design. nVidia has set the core frequency at 900 MHz. The GDDR5 memory is set to run at a frequency of 1026 MHz on this specific card. It features 192 SPUs as well as 32 TAUs and 24 ROPs.

Compare those specs to the Radeon R7 250, which features a core clock frequency of 1000 MHz and a GDDR5 memory speed of 1150 MHz. It also features a 128-bit bus, and uses a 28 nm design. It is comprised of 384 SPUs, 24 Texture Address Units, and 8 ROPs.

(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

In theory, the GeForce GTX 550 Ti is 34% faster than the Radeon R7 250 overall, due to its higher bandwidth. (explain)

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

Texel Rate

The GeForce GTX 550 Ti is a small bit (more or less 20%) faster with regards to anisotropic 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 is quite a bit (approximately 170%) better at FSAA than the Radeon R7 250, and should be able to handle higher resolutions while still performing well. (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 moved across the external memory interface in a second. It's worked out by multiplying the interface width by the speed of its memory. In the case of DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. 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 are processed in one second. This figure is calculated by multiplying the total amount 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 applied in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.

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