Join Us On Facebook

Compare any two graphics cards:
VS

GeForce GTX 650 vs Radeon HD 6850

Intro

The GeForce GTX 650 comes with a GPU clock speed of 1058 MHz, and the 2048 MB of GDDR5 memory runs at 1250 MHz through a 128-bit bus. It also features 384 SPUs, 32 TAUs, and 16 ROPs.

Compare all that to the Radeon HD 6850, which comes with a core clock frequency of 775 MHz and a GDDR5 memory frequency of 1000 MHz. It also uses a 256-bit bus, and uses a 40 nm design. It is made up of 960 SPUs, 48 Texture Address Units, and 32 Raster Operation Units.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650 64 Watts
Radeon HD 6850 127 Watts
Difference: 63 Watts (98%)

Memory Bandwidth

The Radeon HD 6850, in theory, should be much faster than the GeForce GTX 650 overall. (explain)

Radeon HD 6850 128000 MB/sec
GeForce GTX 650 80000 MB/sec
Difference: 48000 (60%)

Texel Rate

The Radeon HD 6850 is a little bit (about 10%) better at anisotropic filtering than the GeForce GTX 650. (explain)

Radeon HD 6850 37200 Mtexels/sec
GeForce GTX 650 33856 Mtexels/sec
Difference: 3344 (10%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 6850 is a better choice, by a large margin. (explain)

Radeon HD 6850 24800 Mpixels/sec
GeForce GTX 650 16928 Mpixels/sec
Difference: 7872 (47%)

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

GeForce GTX 650

Amazon.com

Radeon HD 6850

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

Model GeForce GTX 650 Radeon HD 6850
Manufacturer nVidia AMD
Year September 2012 October 2010
Code Name GK107 Barts Pro
Fab Process 28 nm 40 nm
Bus PCIe 3.0 x16 PCIe x16
Memory 2048 MB 1024 MB
Core Speed 1058 MHz 775 MHz
Shader Speed 1058 MHz (N/A) MHz
Memory Speed 1250 MHz (5000 MHz effective) 1000 MHz (4000 MHz effective)
Unified Shaders 384 960
Texture Mapping Units 32 48
Render Output Units 16 32
Bus Type GDDR5 GDDR5
Bus Width 128-bit 256-bit
DirectX Version DirectX 11.0 DirectX 11
OpenGL Version OpenGL 4.3 OpenGL 4.1
Power (Max TDP) 64 watts 127 watts
Shader Model 5.0 5.0
Bandwidth 80000 MB/sec 128000 MB/sec
Texel Rate 33856 Mtexels/sec 37200 Mtexels/sec
Pixel Rate 16928 Mpixels/sec 24800 Mpixels/sec

Memory Bandwidth: Bandwidth is the largest amount of information (in units of megabytes per second) that can be moved across the external memory interface in a second. It's worked out by multiplying the bus width by its memory speed. If the card has DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better this number, the better the video 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 most pixels the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.

Comments

Be the first to leave a comment!

Your email address will not be published.


You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>

Spam Protection by WP-SpamFree