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GeForce GTX 650 Ti 2GB vs Radeon HD 6670 (OEM) 1GB

Intro

The GeForce GTX 650 Ti 2GB comes with core clock speeds of 928 MHz on the GPU, and 1350 MHz on the 2048 MB of GDDR5 memory. It features 768 SPUs as well as 64 Texture Address Units and 16 ROPs.

Compare those specs to the Radeon HD 6670 (OEM) 1GB, which comes with clock speeds of 800 MHz on the GPU, and 1000 MHz on the 1024 MB of GDDR5 memory. It features 480 SPUs along with 24 TAUs and 8 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6670 (OEM) 1GB 63 Watts
GeForce GTX 650 Ti 2GB 110 Watts
Difference: 47 Watts (75%)

Memory Bandwidth

Performance-wise, the GeForce GTX 650 Ti 2GB should theoretically be a lot superior to the Radeon HD 6670 (OEM) 1GB overall. (explain)

GeForce GTX 650 Ti 2GB 86400 MB/sec
Radeon HD 6670 (OEM) 1GB 64000 MB/sec
Difference: 22400 (35%)

Texel Rate

The GeForce GTX 650 Ti 2GB is a lot (more or less 209%) better at anisotropic filtering than the Radeon HD 6670 (OEM) 1GB. (explain)

GeForce GTX 650 Ti 2GB 59392 Mtexels/sec
Radeon HD 6670 (OEM) 1GB 19200 Mtexels/sec
Difference: 40192 (209%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTX 650 Ti 2GB is the winner, and very much so. (explain)

GeForce GTX 650 Ti 2GB 14848 Mpixels/sec
Radeon HD 6670 (OEM) 1GB 6400 Mpixels/sec
Difference: 8448 (132%)

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 Ti 2GB

Radeon HD 6670 (OEM) 1GB

Specifications

Display Specifications

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Model GeForce GTX 650 Ti 2GB Radeon HD 6670 (OEM) 1GB
Manufacturer nVidia AMD
Year October 2012 February 2011
Code Name GK106 Turks
Memory 2048 MB 1024 MB
Core Speed 928 MHz 800 MHz
Memory Speed 5400 MHz 4000 MHz
Power (Max TDP) 110 watts 63 watts
Bandwidth 86400 MB/sec 64000 MB/sec
Texel Rate 59392 Mtexels/sec 19200 Mtexels/sec
Pixel Rate 14848 Mpixels/sec 6400 Mpixels/sec
Unified Shaders 768 480
Texture Mapping Units 64 24
Render Output Units 16 8
Bus Type GDDR5 GDDR5
Bus Width 128-bit 128-bit
Fab Process 28 nm 40 nm
Transistors 2540 million 715 million
Bus PCIe 3.0 x16 PCIe 2.1 x16
DirectX Version DirectX 11.0 DirectX 11
OpenGL Version OpenGL 4.3 OpenGL 4.1

Memory Bandwidth: Bandwidth is the max amount of data (in units of MB per second) that can be moved past the external memory interface in one second. It's calculated by multiplying the interface width by its memory speed. If it uses DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster 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 are processed per second. This number is calculated by multiplying the total amount of texture units of the card by the core 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 processed per second.

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

GeForce GTX 650 Ti 2GB

Radeon HD 6670 (OEM) 1GB

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