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GeForce GTX 650 Ti 2GB vs Radeon HD 4790

Intro

The GeForce GTX 650 Ti 2GB features a clock frequency of 928 MHz and a GDDR5 memory speed of 1350 MHz. It also uses a 128-bit memory bus, and makes use of a 28 nm design. It is comprised of 768 SPUs, 64 Texture Address Units, and 16 ROPs.

Compare all that to the Radeon HD 4790, which has GPU clock speed of 600 MHz, and 512 MB of GDDR5 RAM set to run at 800 MHz through a 256-bit bus. It also features 640(128x5) SPUs, 32 TAUs, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

As far as performance goes, the Radeon HD 4790 should theoretically be a bit better than the GeForce GTX 650 Ti 2GB overall. (explain)

Radeon HD 4790 102400 MB/sec
GeForce GTX 650 Ti 2GB 86400 MB/sec
Difference: 16000 (19%)

Texel Rate

The GeForce GTX 650 Ti 2GB is a lot (approximately 209%) better at texture filtering than the Radeon HD 4790. (explain)

GeForce GTX 650 Ti 2GB 59392 Mtexels/sec
Radeon HD 4790 19200 Mtexels/sec
Difference: 40192 (209%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce GTX 650 Ti 2GB is superior to the Radeon HD 4790, by far. (explain)

GeForce GTX 650 Ti 2GB 14848 Mpixels/sec
Radeon HD 4790 9600 Mpixels/sec
Difference: 5248 (55%)

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 Ti 2GB

Amazon.com

Check prices at:

Radeon HD 4790

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 Ti 2GB Radeon HD 4790
Manufacturer nVidia AMD
Year October 2012 2009
Code Name GK106 RV790
Memory 2048 MB 512 MB
Core Speed 928 MHz 600 MHz
Memory Speed 5400 MHz 3200 MHz
Power (Max TDP) 110 watts (Unknown) watts
Bandwidth 86400 MB/sec 102400 MB/sec
Texel Rate 59392 Mtexels/sec 19200 Mtexels/sec
Pixel Rate 14848 Mpixels/sec 9600 Mpixels/sec
Unified Shaders 768 640(128x5)
Texture Mapping Units 64 32
Render Output Units 16 16
Bus Type GDDR5 GDDR5
Bus Width 128-bit 256-bit
Fab Process 28 nm 55 nm
Transistors 2540 million 959 million
Bus PCIe 3.0 x16 PCIe 2.0 x16
DirectX Version DirectX 11.0 DirectX 10.1
OpenGL Version OpenGL 4.3 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the largest amount of data (counted in MB per second) that can be moved across the external memory interface in one second. It's worked out by multiplying the card's bus width by its memory speed. In the case of DDR memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better 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 is calculated by multiplying the total texture units of the card by the core speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

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GeForce GTX 650 Ti 2GB

Amazon.com

Check prices at:

Radeon HD 4790

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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