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GeForce GTX 650 vs Radeon HD 5870


Intro

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

Compare that to the Radeon HD 5870, which makes use of a 40 nm design. AMD has set the core frequency at 850 MHz. The GDDR5 memory runs at a frequency of 1200 MHz on this specific card. It features 1600(320x5) SPUs along with 80 Texture Address Units 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

Theoretically speaking, the Radeon HD 5870 will be 92% faster than the GeForce GTX 650 in general, because of its greater bandwidth. (explain)

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

Texel Rate

The Radeon HD 5870 will be a lot (approximately 101%) more effective at 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 running with high levels of AA is important to you, then the Radeon HD 5870 is superior to the GeForce GTX 650, by far. (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

Radeon HD 5870

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 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 information (measured in megabytes per second) that can be transported over the external memory interface in one second. The number is calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster 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 texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total number of texture units by the core speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number 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 output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

Hide Prices

GeForce GTX 650

Amazon.com

Radeon HD 5870

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.

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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