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GeForce 8800 GTS (G92) vs GeForce GTX 650

Intro

The GeForce 8800 GTS (G92) features a core clock frequency of 650 MHz and a GDDR3 memory frequency of 970 MHz. It also makes use of a 256-bit memory bus, and uses a 65 nm design. It is comprised of 128 SPUs, 64 TAUs, and 16 ROPs.

Compare all of that to the GeForce GTX 650, which makes use of a 28 nm design. nVidia has clocked the core speed at 1058 MHz. The GDDR5 RAM is set to run at a speed of 1250 MHz on this model. It features 384 SPUs as well as 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 will be 29% quicker than the GeForce 8800 GTS (G92) in general, because of its greater 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 a lot (approximately 23%) better at texture 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 a high resolution is important to you, then the GeForce GTX 650 is a better choice, by a large margin. (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: Memory bandwidth is the largest amount of information (measured in MB per second) that can be moved across the external memory interface within a second. It is worked out by multiplying the bus width by its memory clock speed. If the card has DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, 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 processed in one second. This figure is calculated by multiplying the total amount of texture units by the core speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the 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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