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GeForce GTS 250 1GB vs GeForce GTX 550 Ti

Intro

The GeForce GTS 250 1GB uses a 65/55 nm design. nVidia has set the core frequency at 738 MHz. The GDDR3 RAM runs at a frequency of 1100 MHz on this specific model. It features 128 SPUs along with 64 TAUs and 16 ROPs.

Compare those specs to the GeForce GTX 550 Ti, which comes with clock speeds of 900 MHz on the GPU, and 1026 MHz on the 1024 MB of GDDR5 memory. It features 192 SPUs along with 32 TAUs and 24 Rasterization Operator Units.

(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

In theory, the GeForce GTX 550 Ti should be a lot 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 will be quite a bit (about 64%) faster with regards to 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

The GeForce GTX 550 Ti is much (approximately 83%) faster with regards to full screen anti-aliasing than the GeForce GTS 250 1GB, and able to handle higher resolutions better. (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: Bandwidth is the max amount of data (measured in megabytes per second) that can be transported past the external memory interface in one second. The number is calculated by multiplying the interface width by its memory speed. If the card has DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, 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 number of texture units of the card by the core speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

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

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