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GeForce GTX 870M vs Radeon HD 5770

Intro

The GeForce GTX 870M comes with a GPU core speed of 941 MHz, and the 3072 MB of GDDR5 RAM is set to run at 1000 MHz through a 192-bit bus. It also is made up of 1344 SPUs, 112 Texture Address Units, and 24 ROPs.

Compare those specifications to the Radeon HD 5770, which has core clock speeds of 850 MHz on the GPU, and 1200 MHz on the 1024 MB of GDDR5 memory. It features 800(160x5) SPUs as well as 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5770 108 Watts
GeForce GTX 870M 110 Watts
Difference: 2 Watts (2%)

Memory Bandwidth

In theory, the GeForce GTX 870M should be 25% faster than the Radeon HD 5770 overall, because of its higher bandwidth. (explain)

GeForce GTX 870M 96000 MB/sec
Radeon HD 5770 76800 MB/sec
Difference: 19200 (25%)

Texel Rate

The GeForce GTX 870M will be quite a bit (about 210%) better at texture filtering than the Radeon HD 5770. (explain)

GeForce GTX 870M 105392 Mtexels/sec
Radeon HD 5770 34000 Mtexels/sec
Difference: 71392 (210%)

Pixel Rate

The GeForce GTX 870M should be much (approximately 66%) more effective at anti-aliasing than the Radeon HD 5770, and capable of handling higher resolutions while still performing well. (explain)

GeForce GTX 870M 22584 Mpixels/sec
Radeon HD 5770 13600 Mpixels/sec
Difference: 8984 (66%)

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 5770

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 5770
Manufacturer nVidia AMD
Year March 12 2014 October 13, 2009
Code Name GK104 Juniper XT
Memory 3072 MB 1024 MB
Core Speed 941 MHz 850 MHz
Memory Speed 4000 MHz 4800 MHz
Power (Max TDP) 110 watts 108 watts
Bandwidth 96000 MB/sec 76800 MB/sec
Texel Rate 105392 Mtexels/sec 34000 Mtexels/sec
Pixel Rate 22584 Mpixels/sec 13600 Mpixels/sec
Unified Shaders 1344 800(160x5)
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 2.1 x16
DirectX Version DirectX 12 DirectX 11
OpenGL Version OpenGL 4.5 OpenGL 3.2

Memory Bandwidth: Memory bandwidth is the maximum amount of information (counted in megabytes per second) that can be transferred over the external memory interface within a second. The number is worked out by multiplying the bus width by its memory clock speed. If the card has DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, the better the card will be at handling 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 that the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

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GeForce GTX 870M

Amazon.com

Check prices at:

Radeon HD 5770

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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