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GeForce 8800 GTX vs Radeon R7 250

Intro

The GeForce 8800 GTX makes use of a 90 nm design. nVidia has clocked the core speed at 575 MHz. The GDDR3 RAM runs at a speed of 900 MHz on this card. It features 128 SPUs as well as 64 Texture Address Units and 24 ROPs.

Compare those specifications to the Radeon R7 250, which uses a 28 nm design. AMD has set the core speed at 1000 MHz. The GDDR5 RAM works at a frequency of 1150 MHz on this specific card. It features 384 SPUs along with 24 Texture Address Units and 8 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250 65 Watts
GeForce 8800 GTX 155 Watts
Difference: 90 Watts (138%)

Memory Bandwidth

In theory, the GeForce 8800 GTX should perform just a bit faster than the Radeon R7 250 in general. (explain)

GeForce 8800 GTX 86400 MB/sec
Radeon R7 250 73600 MB/sec
Difference: 12800 (17%)

Texel Rate

The GeForce 8800 GTX should be quite a bit (about 53%) better at anisotropic filtering than the Radeon R7 250. (explain)

GeForce 8800 GTX 36800 Mtexels/sec
Radeon R7 250 24000 Mtexels/sec
Difference: 12800 (53%)

Pixel Rate

The GeForce 8800 GTX is much (more or less 73%) more effective at AA than the Radeon R7 250, and also should be able to handle higher screen resolutions without slowing down too much. (explain)

GeForce 8800 GTX 13800 Mpixels/sec
Radeon R7 250 8000 Mpixels/sec
Difference: 5800 (73%)

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 8800 GTX

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

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Model GeForce 8800 GTX Radeon R7 250
Manufacturer nVidia AMD
Year Nov 2006 October 2013
Code Name G80 Oland XT
Memory 768 MB 1024 MB
Core Speed 575 MHz 1000 MHz
Memory Speed 1800 MHz 4600 MHz
Power (Max TDP) 155 watts 65 watts
Bandwidth 86400 MB/sec 73600 MB/sec
Texel Rate 36800 Mtexels/sec 24000 Mtexels/sec
Pixel Rate 13800 Mpixels/sec 8000 Mpixels/sec
Unified Shaders 128 384
Texture Mapping Units 64 24
Render Output Units 24 8
Bus Type GDDR3 GDDR5
Bus Width 384-bit 128-bit
Fab Process 90 nm 28 nm
Transistors 681 million 1040 million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 10 DirectX 11.2
OpenGL Version OpenGL 3.0 OpenGL 4.3

Memory Bandwidth: Bandwidth is the maximum amount of data (counted in MB per second) that can be transferred over the external memory interface in a second. It is worked out by multiplying the interface width by its memory speed. If it uses DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This figure is calculated by multiplying the total number of texture units of the card by the core clock 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 its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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GeForce 8800 GTX

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.

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