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Geforce GTX 770 vs Geforce GTX 780

Intro

The Geforce GTX 770 comes with core clock speeds of 1046 MHz on the GPU, and 1753 MHz on the 2048 MB of GDDR5 memory. It features 1536 SPUs as well as 128 Texture Address Units and 32 ROPs.

Compare all of that to the Geforce GTX 780, which features core clock speeds of 863 MHz on the GPU, and 1502 MHz on the 3072 MB of GDDR5 memory. It features 2304 SPUs along with 192 Texture Address Units and 48 Rasterization Operator 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

In theory, the Geforce GTX 780 should perform quite a bit faster than the Geforce GTX 770 in general. (explain)

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

Texel Rate

The Geforce GTX 780 will be much (approximately 24%) faster with regards to AF than the Geforce GTX 770. (explain)

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

Pixel Rate

If running with a high resolution is important to you, then the Geforce GTX 780 is a better choice, by far. (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 maximum amount of data (measured in megabytes per second) that can be transferred across the external memory interface within a second. The number is worked out by multiplying the bus width by its memory clock speed. In the case of DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

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