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GeForce GTS 250 1GB vs GeForce GTX 550 Ti

Intro

The GeForce GTS 250 1GB comes with a GPU core clock speed of 738 MHz, and the 1024 MB of GDDR3 RAM runs at 1100 MHz through a 256-bit bus. It also is made up of 128 Stream Processors, 64 Texture Address Units, and 16 ROPs.

Compare those specs to the GeForce GTX 550 Ti, which makes use of a 40 nm design. nVidia has clocked the core speed at 900 MHz. The GDDR5 RAM is set to run at a frequency of 1026 MHz on this specific model. It features 192 SPUs as well as 32 TAUs and 24 ROPs.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 550 Ti 116 Watts
GeForce GTS 250 1GB 145 Watts
Difference: 29 Watts (25%)

Memory Bandwidth

The GeForce GTX 550 Ti should theoretically perform quite a bit faster than the GeForce GTS 250 1GB in general. (explain)

GeForce GTX 550 Ti 98496 MB/sec
GeForce GTS 250 1GB 70400 MB/sec
Difference: 28096 (40%)

Texel Rate

The GeForce GTS 250 1GB is a lot (more or less 64%) better at anisotropic filtering than the GeForce GTX 550 Ti. (explain)

GeForce GTS 250 1GB 47232 Mtexels/sec
GeForce GTX 550 Ti 28800 Mtexels/sec
Difference: 18432 (64%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce GTX 550 Ti is the winner, and very much so. (explain)

GeForce GTX 550 Ti 21600 Mpixels/sec
GeForce GTS 250 1GB 11808 Mpixels/sec
Difference: 9792 (83%)

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 250 1GB

Amazon.com

GeForce GTX 550 Ti

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 GTS 250 1GB GeForce GTX 550 Ti
Manufacturer nVidia nVidia
Year March 3, 2009 March 2011
Code Name G92a/b GF116
Fab Process 65/55 nm 40 nm
Bus PCIe x16 2.0 PCIe 2.1 x16
Memory 1024 MB 1024 MB
Core Speed 738 MHz 900 MHz
Shader Speed 1836 MHz 1800 MHz
Memory Speed 1100 MHz (2200 MHz effective) 1026 MHz (4104 MHz effective)
Unified Shaders 128 192
Texture Mapping Units 64 32
Render Output Units 16 24
Bus Type GDDR3 GDDR5
Bus Width 256-bit 192-bit
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.1 OpenGL 4.1
Power (Max TDP) 145 watts 116 watts
Shader Model 4.0 5.0
Bandwidth 70400 MB/sec 98496 MB/sec
Texel Rate 47232 Mtexels/sec 28800 Mtexels/sec
Pixel Rate 11808 Mpixels/sec 21600 Mpixels/sec

Memory Bandwidth: Memory bandwidth is the largest amount of information (measured in MB per second) that can be transported past the external memory interface within a second. It's worked out by multiplying the bus width by its memory speed. If the card has DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the video 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 most pixels that the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.

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