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GeForce GTX 650 Ti vs Radeon HD 7790


Intro

The GeForce GTX 650 Ti makes use of a 28 nm design. nVidia has set the core frequency at 928 MHz. The GDDR5 RAM is set to run at a frequency of 1350 MHz on this card. It features 768 SPUs along with 64 TAUs and 16 ROPs.

Compare those specs to the Radeon HD 7790, which has a clock speed of 1000 MHz and a GDDR5 memory frequency of 1500 MHz. It also makes use of a 128-bit bus, and uses a 28 nm design. It is made up of 896 SPUs, 56 Texture Address Units, and 16 ROPs.

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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

Radeon HD 7790 4330 points
GeForce GTX 650 Ti 3430 points
Difference: 900 (26%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7790 85 Watts
GeForce GTX 650 Ti 110 Watts
Difference: 25 Watts (29%)

Memory Bandwidth

Performance-wise, the Radeon HD 7790 should in theory be just a bit superior to the GeForce GTX 650 Ti overall. (explain)

Radeon HD 7790 96000 MB/sec
GeForce GTX 650 Ti 86400 MB/sec
Difference: 9600 (11%)

Texel Rate

The GeForce GTX 650 Ti should be a bit (approximately 6%) faster with regards to texture filtering than the Radeon HD 7790. (explain)

GeForce GTX 650 Ti 59392 Mtexels/sec
Radeon HD 7790 56000 Mtexels/sec
Difference: 3392 (6%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 7790 is a better choice, but only just. (explain)

Radeon HD 7790 16000 Mpixels/sec
GeForce GTX 650 Ti 14848 Mpixels/sec
Difference: 1152 (8%)

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

Radeon HD 7790

Specifications

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Model GeForce GTX 650 Ti Radeon HD 7790
Manufacturer nVidia AMD
Year October 2012 March 2013
Code Name GK106 Bonaire XT
Memory 1024 MB 1024 MB
Core Speed 928 MHz 1000 MHz
Memory Speed 5400 MHz 6000 MHz
Power (Max TDP) 110 watts 85 watts
Bandwidth 86400 MB/sec 96000 MB/sec
Texel Rate 59392 Mtexels/sec 56000 Mtexels/sec
Pixel Rate 14848 Mpixels/sec 16000 Mpixels/sec
Unified Shaders 768 896
Texture Mapping Units 64 56
Render Output Units 16 16
Bus Type GDDR5 GDDR5
Bus Width 128-bit 128-bit
Fab Process 28 nm 28 nm
Transistors 2540 million 2080 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.0 DirectX 11.1
OpenGL Version OpenGL 4.3 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the max amount of data (in units of megabytes per second) that can be transported over the external memory interface in one second. It's worked out by multiplying the interface width by the speed of its memory. If the card has DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This figure is calculated by multiplying the total texture units of the card by the core speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of 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 fill rate also depends on lots of 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

Radeon HD 7790

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