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GeForce GTX 660 Ti vs Radeon HD 5850

Intro

The GeForce GTX 660 Ti uses a 28 nm design. nVidia has clocked the core frequency at 915 MHz. The GDDR5 memory is set to run at a frequency of 1500 MHz on this specific card. It features 1344 SPUs along with 112 TAUs and 24 ROPs.

Compare all of that to the Radeon HD 5850, which features GPU core speed of 725 MHz, and 1024 MB of GDDR5 memory running at 1000 MHz through a 256-bit bus. It also features 1440(288x5) SPUs, 72 TAUs, and 32 ROPs.

Display Graphs

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(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 660 Ti 150 Watts
Radeon HD 5850 151 Watts
Difference: 1 Watts (1%)

Memory Bandwidth

In theory, the GeForce GTX 660 Ti is 13% quicker than the Radeon HD 5850 overall, because of its greater data rate. (explain)

GeForce GTX 660 Ti 144000 MB/sec
Radeon HD 5850 128000 MB/sec
Difference: 16000 (13%)

Texel Rate

The GeForce GTX 660 Ti will be a lot (about 96%) better at texture filtering than the Radeon HD 5850. (explain)

GeForce GTX 660 Ti 102480 Mtexels/sec
Radeon HD 5850 52200 Mtexels/sec
Difference: 50280 (96%)

Pixel Rate

The Radeon HD 5850 should be a bit (more or less 6%) more effective at anti-aliasing than the GeForce GTX 660 Ti, and also should be capable of handling higher screen resolutions while still performing well. (explain)

Radeon HD 5850 23200 Mpixels/sec
GeForce GTX 660 Ti 21960 Mpixels/sec
Difference: 1240 (6%)

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 660 Ti

Amazon.com

Radeon HD 5850

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 660 Ti Radeon HD 5850
Manufacturer nVidia AMD
Year August 2012 September 30, 2009
Code Name GK104 Cypress PRO
Fab Process 28 nm 40 nm
Bus PCIe 3.0 x16 PCIe 2.1 x16
Memory 2048 MB 1024 MB
Core Speed 915 MHz 725 MHz
Shader Speed 915 MHz (N/A) MHz
Memory Speed 6000 MHz 4000 MHz
Unified Shaders 1344 1440(288x5)
Texture Mapping Units 112 72
Render Output Units 24 32
Bus Type GDDR5 GDDR5
Bus Width 192-bit 256-bit
DirectX Version DirectX 11.0 DirectX 11
OpenGL Version OpenGL 4.3 OpenGL 3.2
Power (Max TDP) 150 watts 151 watts
Shader Model 5.0 5.0
Bandwidth 144000 MB/sec 128000 MB/sec
Texel Rate 102480 Mtexels/sec 52200 Mtexels/sec
Pixel Rate 21960 Mpixels/sec 23200 Mpixels/sec

Memory Bandwidth: Bandwidth is the maximum amount of data (measured in megabytes per second) that can be transferred past the external memory interface within a second. It's worked out by multiplying the bus width by its memory clock speed. If the card has DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better 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 are applied per second. This figure is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

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