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GeForce 8600 GT 512MB GDDR3 vs Radeon R9 390 8G

Intro

The GeForce 8600 GT 512MB GDDR3 features a core clock frequency of 540 MHz and a GDDR3 memory speed of 700 MHz. It also makes use of a 128-bit memory bus, and makes use of a 80 nm design. It is comprised of 32 SPUs, 16 Texture Address Units, and 8 ROPs.

Compare those specs to the Radeon R9 390 8G, which uses a 28 nm design. AMD has set the core speed at 1000 MHz. The GDDR5 memory runs at a frequency of 1500 MHz on this model. It features 2560 SPUs as well as 160 TAUs and 64 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8600 GT 512MB GDDR3 47 Watts
Radeon R9 390 8G 275 Watts
Difference: 228 Watts (485%)

Memory Bandwidth

As far as performance goes, the Radeon R9 390 8G should in theory be quite a bit better than the GeForce 8600 GT 512MB GDDR3 overall. (explain)

Radeon R9 390 8G 384000 MB/sec
GeForce 8600 GT 512MB GDDR3 22400 MB/sec
Difference: 361600 (1614%)

Texel Rate

The Radeon R9 390 8G will be quite a bit (about 1752%) better at anisotropic filtering than the GeForce 8600 GT 512MB GDDR3. (explain)

Radeon R9 390 8G 160000 Mtexels/sec
GeForce 8600 GT 512MB GDDR3 8640 Mtexels/sec
Difference: 151360 (1752%)

Pixel Rate

If using a high resolution is important to you, then the Radeon R9 390 8G is the winner, and very much so. (explain)

Radeon R9 390 8G 64000 Mpixels/sec
GeForce 8600 GT 512MB GDDR3 4320 Mpixels/sec
Difference: 59680 (1381%)

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 8600 GT 512MB GDDR3

Amazon.com

Check prices at:

Radeon R9 390 8G

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 8600 GT 512MB GDDR3 Radeon R9 390 8G
Manufacturer nVidia AMD
Year April 2007 June 2015
Code Name G84 Grenada PRO
Memory 512 MB 8192 MB
Core Speed 540 MHz 1000 MHz
Memory Speed 1400 MHz 6000 MHz
Power (Max TDP) 47 watts 275 watts
Bandwidth 22400 MB/sec 384000 MB/sec
Texel Rate 8640 Mtexels/sec 160000 Mtexels/sec
Pixel Rate 4320 Mpixels/sec 64000 Mpixels/sec
Unified Shaders 32 2560
Texture Mapping Units 16 160
Render Output Units 8 64
Bus Type GDDR3 GDDR5
Bus Width 128-bit 512-bit
Fab Process 80 nm 28 nm
Transistors 289 million 6200 million
Bus PCIe x16 PCIe 3.0 ×16
DirectX Version DirectX 10 DirectX 12.0
OpenGL Version OpenGL 3.0 OpenGL 4.5

Memory Bandwidth: Memory bandwidth is the maximum amount of data (measured in megabytes per second) that can be moved past the external memory interface in one second. The number is worked out by multiplying the interface width by its memory clock speed. In the case of DDR RAM, it must be multiplied by 2 once again. If it uses 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, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This figure is worked out by multiplying the total texture units of the card by the core speed of the chip. The higher this number, the better the card will be at handling 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 that the graphics card could possibly record to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

Hide Prices

GeForce 8600 GT 512MB GDDR3

Amazon.com

Check prices at:

Radeon R9 390 8G

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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