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GeForce GTX 660 vs Radeon R7 250

Intro

The GeForce GTX 660 uses a 28 nm design. nVidia has set the core frequency at 980 MHz. The GDDR5 memory works at a frequency of 1502 MHz on this model. It features 960 SPUs along with 80 TAUs and 24 Rasterization Operator Units.

Compare all that to the Radeon R7 250, which features a core clock speed of 1000 MHz and a GDDR5 memory speed of 1150 MHz. It also makes use of a 128-bit memory bus, and uses a 28 nm design. It is made up of 384 SPUs, 24 TAUs, and 8 Raster Operation Units.

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

GeForce GTX 660 5063 points
Radeon R7 250 1836 points
Difference: 3227 (176%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250 65 Watts
GeForce GTX 660 140 Watts
Difference: 75 Watts (115%)

Memory Bandwidth

In theory, the GeForce GTX 660 will be 96% faster than the Radeon R7 250 overall, because of its greater data rate. (explain)

GeForce GTX 660 144192 MB/sec
Radeon R7 250 73600 MB/sec
Difference: 70592 (96%)

Texel Rate

The GeForce GTX 660 is much (approximately 227%) faster with regards to texture filtering than the Radeon R7 250. (explain)

GeForce GTX 660 78400 Mtexels/sec
Radeon R7 250 24000 Mtexels/sec
Difference: 54400 (227%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GTX 660 is a better choice, by a large margin. (explain)

GeForce GTX 660 23520 Mpixels/sec
Radeon R7 250 8000 Mpixels/sec
Difference: 15520 (194%)

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

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GeForce GTX 660

Amazon.com

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Radeon R7 250

Amazon.com

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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

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Model GeForce GTX 660 Radeon R7 250
Manufacturer nVidia AMD
Year September 2012 October 2013
Code Name GK106 Oland XT
Memory 2048 MB 1024 MB
Core Speed 980 MHz 1000 MHz
Memory Speed 6008 MHz 4600 MHz
Power (Max TDP) 140 watts 65 watts
Bandwidth 144192 MB/sec 73600 MB/sec
Texel Rate 78400 Mtexels/sec 24000 Mtexels/sec
Pixel Rate 23520 Mpixels/sec 8000 Mpixels/sec
Unified Shaders 960 384
Texture Mapping Units 80 24
Render Output Units 24 8
Bus Type GDDR5 GDDR5
Bus Width 192-bit 128-bit
Fab Process 28 nm 28 nm
Transistors 2540 million 1040 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.0 DirectX 11.2
OpenGL Version OpenGL 4.3 OpenGL 4.3

Memory Bandwidth: Bandwidth is the maximum amount of data (counted in MB per second) that can be transported past the external memory interface in a second. It's worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Display Prices

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GeForce GTX 660

Amazon.com

Check prices at:

Radeon R7 250

Amazon.com

Check prices at:

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.

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