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Geforce GTX 770 vs Radeon HD 7870


Intro

The Geforce GTX 770 uses a 28 nm design. nVidia has clocked the core speed at 1046 MHz. The GDDR5 memory runs at a speed of 1753 MHz on this specific model. It features 1536 SPUs along with 128 TAUs and 32 ROPs.

Compare that to the Radeon HD 7870, which features a core clock frequency of 1000 MHz and a GDDR5 memory speed of 1200 MHz. It also features a 256-bit memory bus, and makes use of a 28 nm design. It is made up of 1280 SPUs, 80 Texture Address Units, and 32 ROPs.

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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 770 7837 points
Radeon HD 7870 6230 points
Difference: 1607 (26%)

Ethereum Mining Hash Rate

Radeon HD 7870 16 Mh/s
Geforce GTX 770 14 Mh/s
Difference: 2 (14%)

Zcash Mining Hash Rate

Radeon HD 7870 172 Sol/s
Geforce GTX 770 70 Sol/s
Difference: 102 (146%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7870 175 Watts
Geforce GTX 770 230 Watts
Difference: 55 Watts (31%)

Memory Bandwidth

In theory, the Geforce GTX 770 will be 46% faster than the Radeon HD 7870 overall, because of its higher bandwidth. (explain)

Geforce GTX 770 224384 MB/sec
Radeon HD 7870 153600 MB/sec
Difference: 70784 (46%)

Texel Rate

The Geforce GTX 770 is quite a bit (about 67%) faster with regards to texture filtering than the Radeon HD 7870. (explain)

Geforce GTX 770 133888 Mtexels/sec
Radeon HD 7870 80000 Mtexels/sec
Difference: 53888 (67%)

Pixel Rate

The Geforce GTX 770 is a bit (about 5%) better at full screen anti-aliasing than the Radeon HD 7870, and will be able to handle higher screen resolutions without losing too much performance. (explain)

Geforce GTX 770 33472 Mpixels/sec
Radeon HD 7870 32000 Mpixels/sec
Difference: 1472 (5%)

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 770

Amazon.com

Radeon HD 7870

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 GTX 770 Radeon HD 7870
Manufacturer nVidia AMD
Year May 2013 March 2012
Code Name GK104 Pitcairn XT
Memory 2048 MB 2048 MB
Core Speed 1046 MHz 1000 MHz
Memory Speed 7012 MHz 4800 MHz
Power (Max TDP) 230 watts 175 watts
Bandwidth 224384 MB/sec 153600 MB/sec
Texel Rate 133888 Mtexels/sec 80000 Mtexels/sec
Pixel Rate 33472 Mpixels/sec 32000 Mpixels/sec
Unified Shaders 1536 1280
Texture Mapping Units 128 80
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 28 nm 28 nm
Transistors 3540 million 2800 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.0 DirectX 11.1
OpenGL Version OpenGL 4.3 OpenGL 4.2

Memory Bandwidth: Bandwidth is the max amount of information (in units of megabytes per second) that can be transferred past the external memory interface in a second. It's worked out by multiplying the interface width by the speed of its memory. If the card has DDR memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the the core 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 is also dependant on quite a few other factors, especially 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 GTX 770

Amazon.com

Radeon HD 7870

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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