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GeForce GTX 870M vs Radeon HD 5770

Intro

The GeForce GTX 870M makes use of a 28 nm design. nVidia has clocked the core speed at 941 MHz. The GDDR5 memory is set to run at a speed of 1000 MHz on this particular card. It features 1344 SPUs as well as 112 TAUs and 24 ROPs.

Compare all that to the Radeon HD 5770, which features GPU clock speed of 850 MHz, and 1024 MB of GDDR5 memory set to run at 1200 MHz through a 128-bit bus. It also is comprised of 800(160x5) Stream Processors, 40 TAUs, and 16 Raster Operation Units.

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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

Theoretically speaking, the GeForce GTX 870M should be 25% quicker than the Radeon HD 5770 in general, because of its higher data rate. (explain)

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

Texel Rate

The GeForce GTX 870M should 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 will be quite a bit (approximately 66%) better at anti-aliasing than the Radeon HD 5770, and capable of handling higher resolutions without losing too much performance. (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

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.

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: Bandwidth is the max amount of information (counted in MB per second) that can be transported across the external memory interface in one second. The number is worked out by multiplying the interface width by its memory clock speed. If the card has DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better 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 applied in one second. This number is calculated by multiplying the total texture units of the card by the core clock 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 in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max 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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