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Geforce GTX 780 vs Radeon R7 250X 2GB

Intro

The Geforce GTX 780 has a core clock frequency of 863 MHz and a GDDR5 memory frequency of 1502 MHz. It also makes use of a 384-bit bus, and uses a 28 nm design. It is made up of 2304 SPUs, 192 Texture Address Units, and 48 Raster Operation Units.

Compare all that to the Radeon R7 250X 2GB, which makes use of a 28 nm design. AMD has clocked the core speed at 1000 MHz. The GDDR5 memory runs at a speed of 1125 MHz on this specific card. It features 640 SPUs as well as 40 Texture Address Units and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250X 2GB 95 Watts
Geforce GTX 780 250 Watts
Difference: 155 Watts (163%)

Memory Bandwidth

Theoretically speaking, the Geforce GTX 780 should be 301% faster than the Radeon R7 250X 2GB overall, because of its higher bandwidth. (explain)

Geforce GTX 780 288384 MB/sec
Radeon R7 250X 2GB 72000 MB/sec
Difference: 216384 (301%)

Texel Rate

The Geforce GTX 780 will be quite a bit (approximately 314%) faster with regards to AF than the Radeon R7 250X 2GB. (explain)

Geforce GTX 780 165696 Mtexels/sec
Radeon R7 250X 2GB 40000 Mtexels/sec
Difference: 125696 (314%)

Pixel Rate

The Geforce GTX 780 is quite a bit (about 159%) more effective at full screen anti-aliasing than the Radeon R7 250X 2GB, and also should be able to handle higher screen resolutions better. (explain)

Geforce GTX 780 41424 Mpixels/sec
Radeon R7 250X 2GB 16000 Mpixels/sec
Difference: 25424 (159%)

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 780

Amazon.com

Check prices at:

Radeon R7 250X 2GB

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.

Specifications

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Model Geforce GTX 780 Radeon R7 250X 2GB
Manufacturer nVidia AMD
Year May 2013 February 2014
Code Name GK110 Cape Verde XT
Memory 3072 MB 2048 MB
Core Speed 863 MHz 1000 MHz
Memory Speed 6008 MHz 4500 MHz
Power (Max TDP) 250 watts 95 watts
Bandwidth 288384 MB/sec 72000 MB/sec
Texel Rate 165696 Mtexels/sec 40000 Mtexels/sec
Pixel Rate 41424 Mpixels/sec 16000 Mpixels/sec
Unified Shaders 2304 640
Texture Mapping Units 192 40
Render Output Units 48 16
Bus Type GDDR5 GDDR5
Bus Width 384-bit 128-bit
Fab Process 28 nm 28 nm
Transistors 7080 million 1500 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: Memory bandwidth is the max amount of information (measured in megabytes per second) that can be moved past the external memory interface in a second. It's worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This is calculated by multiplying the total texture units by the core speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

Hide Prices

Geforce GTX 780

Amazon.com

Check prices at:

Radeon R7 250X 2GB

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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