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

Intro

The GeForce 8600 GT 512MB GDDR3 uses a 80 nm design. nVidia has set the core frequency at 540 MHz. The GDDR3 RAM runs at a speed of 700 MHz on this particular card. It features 32 SPUs along with 16 TAUs and 8 ROPs.

Compare that to the Radeon R9 390 8G, which features GPU core speed of 1000 MHz, and 8192 MB of GDDR5 RAM running at 1500 MHz through a 512-bit bus. It also is comprised of 2560 Stream Processors, 160 Texture Address Units, and 64 Raster Operation Units.

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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

The Radeon R9 390 8G, in theory, should be quite a bit faster 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 is much (about 1752%) faster with regards to AF 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

The Radeon R9 390 8G is quite a bit (about 1381%) faster with regards to full screen anti-aliasing than the GeForce 8600 GT 512MB GDDR3, and will be able to handle higher resolutions while still performing well. (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 (counted in megabytes per second) that can be transferred over the external memory interface in one second. The number is worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher 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 are applied per second. This figure is calculated by multiplying the total number of texture units by the core speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video 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 ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach 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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