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GeForce GT 320 vs GeForce GTX 650

Intro

The GeForce GT 320 features a clock speed of 540 MHz and a GDDR3 memory speed of 790 MHz. It also features a 128-bit memory bus, and makes use of a 40 nm design. It is comprised of 72 SPUs, 24 Texture Address Units, and 8 Raster Operation Units.

Compare all of that to the GeForce GTX 650, which has a clock frequency of 1058 MHz and a GDDR5 memory speed of 1250 MHz. It also uses a 128-bit memory bus, and uses a 28 nm design. It is made up of 384 SPUs, 32 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320 43 Watts
GeForce GTX 650 64 Watts
Difference: 21 Watts (49%)

Memory Bandwidth

In theory, the GeForce GTX 650 should be much faster than the GeForce GT 320 overall. (explain)

GeForce GTX 650 80000 MB/sec
GeForce GT 320 25280 MB/sec
Difference: 54720 (216%)

Texel Rate

The GeForce GTX 650 should be much (more or less 161%) faster with regards to texture filtering than the GeForce GT 320. (explain)

GeForce GTX 650 33856 Mtexels/sec
GeForce GT 320 12960 Mtexels/sec
Difference: 20896 (161%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce GTX 650 is a better choice, and very much so. (explain)

GeForce GTX 650 16928 Mpixels/sec
GeForce GT 320 4320 Mpixels/sec
Difference: 12608 (292%)

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 GT 320

Amazon.com

Check prices at:

GeForce GTX 650

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 GT 320 GeForce GTX 650
Manufacturer nVidia nVidia
Year February 2010 September 2012
Code Name GT215 GK107
Memory 1024 MB 1024 MB
Core Speed 540 MHz 1058 MHz
Memory Speed 1580 MHz 5000 MHz
Power (Max TDP) 43 watts 64 watts
Bandwidth 25280 MB/sec 80000 MB/sec
Texel Rate 12960 Mtexels/sec 33856 Mtexels/sec
Pixel Rate 4320 Mpixels/sec 16928 Mpixels/sec
Unified Shaders 72 384
Texture Mapping Units 24 32
Render Output Units 8 16
Bus Type GDDR3 GDDR5
Bus Width 128-bit 128-bit
Fab Process 40 nm 28 nm
Transistors 727 million 1300 million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 10.1 DirectX 11.0
OpenGL Version OpenGL 3.3 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the maximum amount of data (measured in megabytes per second) that can be transported across the external memory interface within a second. It's calculated by multiplying the interface width by its memory speed. If it uses DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total number of texture units of the card by the core clock 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 per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

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GeForce GT 320

Amazon.com

Check prices at:

GeForce GTX 650

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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