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GeForce GT 320 vs Radeon HD 7870 XT

Intro

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

Compare that to the Radeon HD 7870 XT, which comes with core clock speeds of 925 MHz on the GPU, and 1500 MHz on the 2048 MB of GDDR5 RAM. It features 1536 SPUs as well as 96 Texture Address Units and 32 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320 43 Watts
Radeon HD 7870 XT 185 Watts
Difference: 142 Watts (330%)

Memory Bandwidth

The Radeon HD 7870 XT should theoretically perform a lot faster than the GeForce GT 320 overall. (explain)

Radeon HD 7870 XT 192000 MB/sec
GeForce GT 320 25280 MB/sec
Difference: 166720 (659%)

Texel Rate

The Radeon HD 7870 XT will be much (about 585%) more effective at anisotropic filtering than the GeForce GT 320. (explain)

Radeon HD 7870 XT 88800 Mtexels/sec
GeForce GT 320 12960 Mtexels/sec
Difference: 75840 (585%)

Pixel Rate

The Radeon HD 7870 XT will be a lot (about 585%) faster with regards to anti-aliasing than the GeForce GT 320, and also should be able to handle higher screen resolutions better. (explain)

Radeon HD 7870 XT 29600 Mpixels/sec
GeForce GT 320 4320 Mpixels/sec
Difference: 25280 (585%)

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:

Radeon HD 7870 XT

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 Radeon HD 7870 XT
Manufacturer nVidia AMD
Year February 2010 November 2012
Code Name GT215 Tahiti LE
Memory 1024 MB 2048 MB
Core Speed 540 MHz 925 MHz
Memory Speed 1580 MHz 6000 MHz
Power (Max TDP) 43 watts 185 watts
Bandwidth 25280 MB/sec 192000 MB/sec
Texel Rate 12960 Mtexels/sec 88800 Mtexels/sec
Pixel Rate 4320 Mpixels/sec 29600 Mpixels/sec
Unified Shaders 72 1536
Texture Mapping Units 24 96
Render Output Units 8 32
Bus Type GDDR3 GDDR5
Bus Width 128-bit 256-bit
Fab Process 40 nm 28 nm
Transistors 727 million 4313 million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 10.1 DirectX 11.1
OpenGL Version OpenGL 3.3 OpenGL 4.3

Memory Bandwidth: Bandwidth is the largest amount of data (in units of megabytes per second) that can be moved past the external memory interface within a second. The number is worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This number is worked out by multiplying the total number 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 in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

Hide Prices

GeForce GT 320

Amazon.com

Check prices at:

Radeon HD 7870 XT

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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