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GeForce 8800 GTS (G92) vs GeForce GTX 650

Intro

The GeForce 8800 GTS (G92) makes use of a 65 nm design. nVidia has set the core frequency at 650 MHz. The GDDR3 RAM is set to run at a frequency of 970 MHz on this specific model. It features 128 SPUs as well as 64 Texture Address Units and 16 ROPs.

Compare all of that to the GeForce GTX 650, which comes with a GPU core clock speed of 1058 MHz, and 2048 MB of GDDR5 memory running at 1250 MHz through a 128-bit bus. It also is comprised of 384 SPUs, 32 TAUs, and 16 ROPs.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650 64 Watts
GeForce 8800 GTS (G92) 135 Watts
Difference: 71 Watts (111%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 650 should be 29% quicker than the GeForce 8800 GTS (G92) overall, because of its higher data rate. (explain)

GeForce GTX 650 80000 MB/sec
GeForce 8800 GTS (G92) 62080 MB/sec
Difference: 17920 (29%)

Texel Rate

The GeForce 8800 GTS (G92) should be much (about 23%) better at anisotropic filtering than the GeForce GTX 650. (explain)

GeForce 8800 GTS (G92) 41600 Mtexels/sec
GeForce GTX 650 33856 Mtexels/sec
Difference: 7744 (23%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 650 is superior to the GeForce 8800 GTS (G92), by far. (explain)

GeForce GTX 650 16928 Mpixels/sec
GeForce 8800 GTS (G92) 10400 Mpixels/sec
Difference: 6528 (63%)

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 8800 GTS (G92)

Amazon.com

GeForce GTX 650

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 8800 GTS (G92) GeForce GTX 650
Manufacturer nVidia nVidia
Year Dec 2007 September 2012
Code Name G92 GK107
Fab Process 65 nm 28 nm
Bus PCIe x16 2.0 PCIe 3.0 x16
Memory 512 MB 2048 MB
Core Speed 650 MHz 1058 MHz
Shader Speed 1625 MHz 1058 MHz
Memory Speed 970 MHz (1940 MHz effective) 1250 MHz (5000 MHz effective)
Unified Shaders 128 384
Texture Mapping Units 64 32
Render Output Units 16 16
Bus Type GDDR3 GDDR5
Bus Width 256-bit 128-bit
DirectX Version DirectX 10 DirectX 11.0
OpenGL Version OpenGL 3.0 OpenGL 4.3
Power (Max TDP) 135 watts 64 watts
Shader Model 4.0 5.0
Bandwidth 62080 MB/sec 80000 MB/sec
Texel Rate 41600 Mtexels/sec 33856 Mtexels/sec
Pixel Rate 10400 Mpixels/sec 16928 Mpixels/sec

Memory Bandwidth: Bandwidth is the max amount of information (in units of megabytes per second) that can be transported across the external memory interface in a second. The number is worked out by multiplying the interface width by the speed of its memory. In the case of DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better 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 amount of texture map elements (texels) that can be applied per second. This is worked out by multiplying the total number of texture units by the core speed of the chip. The higher the texel rate, 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 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 colour 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 fill rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

Comments

One Response to “GeForce 8800 GTS (G92) vs GeForce GTX 650”
Anonymous says:
thanks....really usefull information

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