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GeForce GTX 650 vs Radeon HD 6770

Intro

The GeForce GTX 650 uses a 28 nm design. nVidia has clocked the core frequency at 1058 MHz. The GDDR5 memory runs at a frequency of 1250 MHz on this model. It features 384 SPUs as well as 32 TAUs and 16 Rasterization Operator Units.

Compare all of that to the Radeon HD 6770, which has core speeds of 900 MHz on the GPU, and 1050 MHz on the 512 MB of GDDR5 memory. It features 800 SPUs along with 40 Texture Address Units and 16 Rasterization Operator Units.

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

GeForce GTX 650 2263 points
Radeon HD 6770 1520 points
Difference: 743 (49%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650 64 Watts
Radeon HD 6770 108 Watts
Difference: 44 Watts (69%)

Memory Bandwidth

Theoretically, the GeForce GTX 650 should perform just a bit faster than the Radeon HD 6770 in general. (explain)

GeForce GTX 650 80000 MB/sec
Radeon HD 6770 67200 MB/sec
Difference: 12800 (19%)

Texel Rate

The Radeon HD 6770 is a little bit (approximately 6%) faster with regards to texture filtering than the GeForce GTX 650. (explain)

Radeon HD 6770 36000 Mtexels/sec
GeForce GTX 650 33856 Mtexels/sec
Difference: 2144 (6%)

Pixel Rate

The GeForce GTX 650 is a little bit (approximately 18%) better at full screen anti-aliasing than the Radeon HD 6770, and also should be capable of handling higher resolutions while still performing well. (explain)

GeForce GTX 650 16928 Mpixels/sec
Radeon HD 6770 14400 Mpixels/sec
Difference: 2528 (18%)

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

Check prices at:

Radeon HD 6770

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 650 Radeon HD 6770
Manufacturer nVidia AMD
Year September 2012 January 2011
Code Name GK107 Juniper XT
Memory 1024 MB 512 MB
Core Speed 1058 MHz 900 MHz
Memory Speed 5000 MHz 4200 MHz
Power (Max TDP) 64 watts 108 watts
Bandwidth 80000 MB/sec 67200 MB/sec
Texel Rate 33856 Mtexels/sec 36000 Mtexels/sec
Pixel Rate 16928 Mpixels/sec 14400 Mpixels/sec
Unified Shaders 384 800
Texture Mapping Units 32 40
Render Output Units 16 16
Bus Type GDDR5 GDDR5
Bus Width 128-bit 128-bit
Fab Process 28 nm 40 nm
Transistors 1300 million 1040 million
Bus PCIe 3.0 x16 PCIe x16
DirectX Version DirectX 11.0 DirectX 11
OpenGL Version OpenGL 4.3 OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the largest amount of information (measured in MB per second) that can be moved past the external memory interface within a second. It is calculated by multiplying the bus width by its memory clock speed. If it uses DDR type RAM, it must 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 texture map elements (texels) that can be applied per second. This is calculated by multiplying the total number of texture units by the core clock speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per 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. Pixel rate is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

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GeForce GTX 650

Amazon.com

Check prices at:

Radeon HD 6770

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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