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GeForce GTX 650 vs Radeon HD 5870

Intro

The GeForce GTX 650 features a GPU core speed of 1058 MHz, and the 1024 MB of GDDR5 memory is set to run at 1250 MHz through a 128-bit bus. It also features 384 Stream Processors, 32 TAUs, and 16 ROPs.

Compare all that to the Radeon HD 5870, which comes with a core clock frequency of 850 MHz and a GDDR5 memory frequency of 1200 MHz. It also makes use of a 256-bit bus, and makes use of a 40 nm design. It features 1600(320x5) SPUs, 80 TAUs, and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650 64 Watts
Radeon HD 5870 188 Watts
Difference: 124 Watts (194%)

Memory Bandwidth

The Radeon HD 5870, in theory, should be quite a bit faster than the GeForce GTX 650 in general. (explain)

Radeon HD 5870 153600 MB/sec
GeForce GTX 650 80000 MB/sec
Difference: 73600 (92%)

Texel Rate

The Radeon HD 5870 is quite a bit (about 101%) faster with regards to AF than the GeForce GTX 650. (explain)

Radeon HD 5870 68000 Mtexels/sec
GeForce GTX 650 33856 Mtexels/sec
Difference: 34144 (101%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 5870 is a better choice, and very much so. (explain)

Radeon HD 5870 27200 Mpixels/sec
GeForce GTX 650 16928 Mpixels/sec
Difference: 10272 (61%)

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 650

Amazon.com

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Radeon HD 5870

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 650 Radeon HD 5870
Manufacturer nVidia AMD
Year September 2012 September 23, 2009
Code Name GK107 Cypress XT
Memory 1024 MB 1024 MB
Core Speed 1058 MHz 850 MHz
Memory Speed 5000 MHz 4800 MHz
Power (Max TDP) 64 watts 188 watts
Bandwidth 80000 MB/sec 153600 MB/sec
Texel Rate 33856 Mtexels/sec 68000 Mtexels/sec
Pixel Rate 16928 Mpixels/sec 27200 Mpixels/sec
Unified Shaders 384 1600(320x5)
Texture Mapping Units 32 80
Render Output Units 16 32
Bus Type GDDR5 GDDR5
Bus Width 128-bit 256-bit
Fab Process 28 nm 40 nm
Transistors 1300 million 2154 million
Bus PCIe 3.0 x16 PCIe 2.1 x16
DirectX Version DirectX 11.0 DirectX 11
OpenGL Version OpenGL 4.3 OpenGL 3.2

Memory Bandwidth: Memory bandwidth is the largest amount of data (counted in megabytes per second) that can be moved past the external memory interface in one second. It is worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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GeForce GTX 650

Amazon.com

Check prices at:

Radeon HD 5870

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.

Comments

2 Responses to “GeForce GTX 650 vs Radeon HD 5870”
Søren says:

Why is your GTX 650 listed as having 2048mb GDDR5 rams when it only has 1024? that makes no sense to me and this is the only place i've found that suggesd this.

MikEms says:

You are correct, slight oversight, will be fixed.
There actually are 2GB versions available.
http://www.gainward.com/main/vgapro.php?id=894&lang=en
https://www.amazon.com/PNY-GeForce-GTX650-VCGGTX650XPB-Graphic/dp/B009T0FDR2

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