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GeForce GT 320 vs Radeon HD 7870 XT

Intro

The GeForce GT 320 makes use of a 40 nm design. nVidia has clocked the core frequency at 540 MHz. The GDDR3 RAM runs at a speed of 790 MHz on this model. It features 72 SPUs as well as 24 Texture Address Units and 8 ROPs.

Compare those specifications to the Radeon HD 7870 XT, which comes with a clock frequency of 925 MHz and a GDDR5 memory speed of 1500 MHz. It also features a 256-bit memory bus, and uses a 28 nm design. It is comprised of 1536 SPUs, 96 Texture Address Units, and 32 ROPs.

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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

Performance-wise, the Radeon HD 7870 XT should theoretically be much better 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 is much (approximately 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 is much (more or less 585%) better at anti-aliasing than the GeForce GT 320, and also will be capable of handling higher resolutions without losing too much performance. (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: Memory bandwidth is the maximum amount of information (measured in megabytes per second) that can be transferred over the external memory interface within a second. It is calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster 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 per second. This is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The higher this number, the better the video card will be at 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 the graphics card 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 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 rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to 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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