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GeForce GTX 650 Ti vs Radeon HD 4850 1GB

Intro

The GeForce GTX 650 Ti comes with core clock speeds of 928 MHz on the GPU, and 1350 MHz on the 1024 MB of GDDR5 RAM. It features 768 SPUs as well as 64 TAUs and 16 Rasterization Operator Units.

Compare that to the Radeon HD 4850 1GB, which comes with a clock speed of 625 MHz and a GDDR4 memory frequency of 993 MHz. It also uses a 256-bit bus, and uses a 55 nm design. It is made up of 800(160x5) SPUs, 40 TAUs, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Both cards have the same power consumption.

Memory Bandwidth

The GeForce GTX 650 Ti should theoretically perform a lot faster than the Radeon HD 4850 1GB in general. (explain)

GeForce GTX 650 Ti 86400 MB/sec
Radeon HD 4850 1GB 63552 MB/sec
Difference: 22848 (36%)

Texel Rate

The GeForce GTX 650 Ti will be a lot (about 138%) faster with regards to texture filtering than the Radeon HD 4850 1GB. (explain)

GeForce GTX 650 Ti 59392 Mtexels/sec
Radeon HD 4850 1GB 25000 Mtexels/sec
Difference: 34392 (138%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTX 650 Ti is the winner, by a large margin. (explain)

GeForce GTX 650 Ti 14848 Mpixels/sec
Radeon HD 4850 1GB 10000 Mpixels/sec
Difference: 4848 (48%)

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

Amazon.com

Check prices at:

Radeon HD 4850 1GB

Amazon.com

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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 Radeon HD 4850 1GB
Manufacturer nVidia AMD
Year October 2012 Jun 25, 2008
Code Name GK106 RV770 PRO
Memory 1024 MB 1024 MB
Core Speed 928 MHz 625 MHz
Memory Speed 5400 MHz 1986 MHz
Power (Max TDP) 110 watts 110 watts
Bandwidth 86400 MB/sec 63552 MB/sec
Texel Rate 59392 Mtexels/sec 25000 Mtexels/sec
Pixel Rate 14848 Mpixels/sec 10000 Mpixels/sec
Unified Shaders 768 800(160x5)
Texture Mapping Units 64 40
Render Output Units 16 16
Bus Type GDDR5 GDDR4
Bus Width 128-bit 256-bit
Fab Process 28 nm 55 nm
Transistors 2540 million 956 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: Bandwidth is the maximum amount of data (measured in MB per second) that can be transported over the external memory interface in a second. It is worked out by multiplying the interface width by its memory speed. If the card has DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the clock 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 lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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GeForce GTX 650 Ti

Amazon.com

Check prices at:

Radeon HD 4850 1GB

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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