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GeForce GTX 870M vs Radeon HD 6770

Intro

The GeForce GTX 870M uses a 28 nm design. nVidia has set the core speed at 941 MHz. The GDDR5 memory runs at a speed of 1000 MHz on this particular card. It features 1344 SPUs along with 112 Texture Address Units and 24 Rasterization Operator Units.

Compare those specifications to the Radeon HD 6770, which uses a 40 nm design. AMD has set the core frequency at 900 MHz. The GDDR5 RAM runs at a frequency of 1050 MHz on this model. It features 800 SPUs along with 40 TAUs and 16 Rasterization Operator Units.

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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 870M 4770 points
Radeon HD 6770 1520 points
Difference: 3250 (214%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6770 108 Watts
GeForce GTX 870M 110 Watts
Difference: 2 Watts (2%)

Memory Bandwidth

The GeForce GTX 870M should theoretically be quite a bit faster than the Radeon HD 6770 in general. (explain)

GeForce GTX 870M 96000 MB/sec
Radeon HD 6770 67200 MB/sec
Difference: 28800 (43%)

Texel Rate

The GeForce GTX 870M will be a lot (more or less 193%) more effective at anisotropic filtering than the Radeon HD 6770. (explain)

GeForce GTX 870M 105392 Mtexels/sec
Radeon HD 6770 36000 Mtexels/sec
Difference: 69392 (193%)

Pixel Rate

The GeForce GTX 870M should be much (more or less 57%) better at anti-aliasing than the Radeon HD 6770, and also will be capable of handling higher screen resolutions better. (explain)

GeForce GTX 870M 22584 Mpixels/sec
Radeon HD 6770 14400 Mpixels/sec
Difference: 8184 (57%)

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 870M

Amazon.com

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Radeon HD 6770

Amazon.com

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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 870M Radeon HD 6770
Manufacturer nVidia AMD
Year March 12 2014 January 2011
Code Name GK104 Juniper XT
Memory 3072 MB 512 MB
Core Speed 941 MHz 900 MHz
Memory Speed 4000 MHz 4200 MHz
Power (Max TDP) 110 watts 108 watts
Bandwidth 96000 MB/sec 67200 MB/sec
Texel Rate 105392 Mtexels/sec 36000 Mtexels/sec
Pixel Rate 22584 Mpixels/sec 14400 Mpixels/sec
Unified Shaders 1344 800
Texture Mapping Units 112 40
Render Output Units 24 16
Bus Type GDDR5 GDDR5
Bus Width 192-bit 128-bit
Fab Process 28 nm 40 nm
Transistors (Unknown) million 1040 million
Bus PCIe 3.0 x16 PCIe x16
DirectX Version DirectX 12 DirectX 11
OpenGL Version OpenGL 4.5 OpenGL 4.1

Memory Bandwidth: Bandwidth is the largest amount of data (in units of MB per second) that can be transported past the external memory interface in a second. The number is calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better 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 can be processed per second. This number is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

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GeForce GTX 870M

Amazon.com

Check prices at:

Radeon HD 6770

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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