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Geforce GTX 770 vs Geforce GTX 780

Intro

The Geforce GTX 770 has a GPU core clock speed of 1046 MHz, and the 2048 MB of GDDR5 RAM runs at 1753 MHz through a 256-bit bus. It also features 1536 Stream Processors, 128 TAUs, and 32 ROPs.

Compare those specs to the Geforce GTX 780, which comes with a GPU core clock speed of 863 MHz, and 3072 MB of GDDR5 RAM set to run at 1502 MHz through a 384-bit bus. It also is made up of 2304 SPUs, 192 TAUs, and 48 Raster Operation Units.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Geforce GTX 770 230 Watts
Geforce GTX 780 250 Watts
Difference: 20 Watts (9%)

Memory Bandwidth

Performance-wise, the Geforce GTX 780 should in theory be much superior to the Geforce GTX 770 overall. (explain)

Geforce GTX 780 288384 MB/sec
Geforce GTX 770 224384 MB/sec
Difference: 64000 (29%)

Texel Rate

The Geforce GTX 780 should be quite a bit (more or less 24%) better at AF than the Geforce GTX 770. (explain)

Geforce GTX 780 165696 Mtexels/sec
Geforce GTX 770 133888 Mtexels/sec
Difference: 31808 (24%)

Pixel Rate

The Geforce GTX 780 will be quite a bit (more or less 24%) better at anti-aliasing than the Geforce GTX 770, and capable of handling higher screen resolutions while still performing well. (explain)

Geforce GTX 780 41424 Mpixels/sec
Geforce GTX 770 33472 Mpixels/sec
Difference: 7952 (24%)

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 GTX 770

Amazon.com

Geforce GTX 780

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 GTX 770 Geforce GTX 780
Manufacturer nVidia nVidia
Year May 2013 May 2013
Code Name GK104 GK110
Fab Process 28 nm 28 nm
Bus PCIe 3.0 x16 PCIe 3.0 x16
Memory 2048 MB 3072 MB
Core Speed 1046 MHz 863 MHz
Shader Speed 1046 MHz 863 MHz
Memory Speed 1753 MHz (7012 MHz effective) 1502 MHz (6008 MHz effective)
Unified Shaders 1536 2304
Texture Mapping Units 128 192
Render Output Units 32 48
Bus Type GDDR5 GDDR5
Bus Width 256-bit 384-bit
DirectX Version DirectX 11.0 DirectX 11.0
OpenGL Version OpenGL 4.3 OpenGL 4.3
Power (Max TDP) 230 watts 250 watts
Shader Model 5.0 5.0
Bandwidth 224384 MB/sec 288384 MB/sec
Texel Rate 133888 Mtexels/sec 165696 Mtexels/sec
Pixel Rate 33472 Mpixels/sec 41424 Mpixels/sec

Memory Bandwidth: Memory bandwidth is the max amount of information (in units of megabytes per second) that can be transported past the external memory interface in a second. It's calculated by multiplying the card's bus width by its memory speed. If it uses DDR type RAM, the result should be multiplied by 2 once 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 higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This is calculated by multiplying the total texture units of the card by the core speed of the chip. The higher the texel rate, the better the graphics card will be at 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 graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the clock 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 rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.

Comments

5 Responses to “Geforce GTX 770 vs Geforce GTX 780”
gg says:
the 780 is shit, GG
sonarctica says:
GG, worst reason ever, i bet you are a AMD sheep and that's the reason why complain for nothing.
sheep says:
GG, you don't know sheep about it 780 is a titan killer
IT says:
Huge mistake in the page. thermal design power (TDP) is not power consumption is heat generated by the device.
IT says:
If you want to learn about TDP, I would recommend Linus Fast as possible videos.

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