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GeForce 8600 GT 256MB GDDR3 vs GeForce GT 430 1GB

Intro

The GeForce 8600 GT 256MB GDDR3 features a core clock frequency of 540 MHz and a GDDR3 memory frequency of 700 MHz. It also makes use of a 128-bit bus, and uses a 80 nm design. It is comprised of 32 SPUs, 16 Texture Address Units, and 8 Raster Operation Units.

Compare all that to the GeForce GT 430 1GB, which features core speeds of 700 MHz on the GPU, and 900 MHz on the 1024 MB of GDDR3 RAM. It features 96 SPUs as well as 16 Texture Address Units and 4 ROPs.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8600 GT 256MB GDDR3 47 Watts
GeForce GT 430 1GB 60 Watts
Difference: 13 Watts (28%)

Memory Bandwidth

Theoretically, the GeForce GT 430 1GB should perform much faster than the GeForce 8600 GT 256MB GDDR3 in general. (explain)

GeForce GT 430 1GB 28800 MB/sec
GeForce 8600 GT 256MB GDDR3 22400 MB/sec
Difference: 6400 (29%)

Texel Rate

The GeForce GT 430 1GB is quite a bit (about 30%) faster with regards to AF than the GeForce 8600 GT 256MB GDDR3. (explain)

GeForce GT 430 1GB 11200 Mtexels/sec
GeForce 8600 GT 256MB GDDR3 8640 Mtexels/sec
Difference: 2560 (30%)

Pixel Rate

The GeForce 8600 GT 256MB GDDR3 should be a lot (approximately 54%) more effective at full screen anti-aliasing than the GeForce GT 430 1GB, and also capable of handling higher resolutions without slowing down too much. (explain)

GeForce 8600 GT 256MB GDDR3 4320 Mpixels/sec
GeForce GT 430 1GB 2800 Mpixels/sec
Difference: 1520 (54%)

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

GeForce 8600 GT 256MB GDDR3

Amazon.com

GeForce GT 430 1GB

Amazon.com

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

Model GeForce 8600 GT 256MB GDDR3 GeForce GT 430 1GB
Manufacturer nVidia nVidia
Year April 2007 October 2010
Code Name G84 GF108
Fab Process 80 nm 40 nm
Bus PCIe x16 PCIe x16
Memory 256 MB 1024 MB
Core Speed 540 MHz 700 MHz
Shader Speed 1180 MHz 1400 MHz
Memory Speed 700 MHz (1400 MHz effective) 900 MHz (1800 MHz effective)
Unified Shaders 32 96
Texture Mapping Units 16 16
Render Output Units 8 4
Bus Type GDDR3 GDDR3
Bus Width 128-bit 128-bit
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 4.1
Power (Max TDP) 47 watts 60 watts
Shader Model 4.0 5.0
Bandwidth 22400 MB/sec 28800 MB/sec
Texel Rate 8640 Mtexels/sec 11200 Mtexels/sec
Pixel Rate 4320 Mpixels/sec 2800 Mpixels/sec

Memory Bandwidth: Bandwidth is the largest amount of information (in units of megabytes per second) that can be transported past the external memory interface within a second. The number is worked out by multiplying the interface width by the speed of its memory. If it uses DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster 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 number of texture map elements (texels) that can be applied in one second. This is worked out by multiplying the total texture units by the core speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels the video card could 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 Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.

Comments

One Response to “GeForce 8600 GT 256MB GDDR3 vs GeForce GT 430 1GB”
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