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GeForce 9800 GT 512MB vs GeForce GTX 750

Intro

The GeForce 9800 GT 512MB comes with a GPU core speed of 600 MHz, and the 512 MB of GDDR3 RAM runs at 900 MHz through a 256-bit bus. It also is comprised of 112 Stream Processors, 56 TAUs, and 16 Raster Operation Units.

Compare that to the GeForce GTX 750, which has a core clock speed of 1020 MHz and a GDDR5 memory frequency of 1250 MHz. It also uses a 128-bit bus, and makes use of a 28 nm design. It features 512 SPUs, 32 TAUs, and 16 Raster Operation Units.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 750 55 Watts
GeForce 9800 GT 512MB 105 Watts
Difference: 50 Watts (91%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 750 should be 39% quicker than the GeForce 9800 GT 512MB overall, because of its greater bandwidth. (explain)

GeForce GTX 750 80000 MB/sec
GeForce 9800 GT 512MB 57600 MB/sec
Difference: 22400 (39%)

Texel Rate

The GeForce 9800 GT 512MB is just a bit (more or less 3%) more effective at AF than the GeForce GTX 750. (explain)

GeForce 9800 GT 512MB 33600 Mtexels/sec
GeForce GTX 750 32640 Mtexels/sec
Difference: 960 (3%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 750 is a better choice, by a large margin. (explain)

GeForce GTX 750 16320 Mpixels/sec
GeForce 9800 GT 512MB 9600 Mpixels/sec
Difference: 6720 (70%)

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 9800 GT 512MB

Amazon.com

GeForce GTX 750

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 9800 GT 512MB GeForce GTX 750
Manufacturer nVidia nVidia
Year July 2008 February 2014
Code Name G92a/b GM107
Fab Process 65/55 nm 28 nm
Bus PCIe x16 2.0 PCIe 3.0 x16
Memory 512 MB 1024 MB
Core Speed 600 MHz 1020 MHz
Shader Speed 1500 MHz (N/A) MHz
Memory Speed 900 MHz (1800 MHz effective) 1250 MHz (5000 MHz effective)
Unified Shaders 112 512
Texture Mapping Units 56 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 4.4
Power (Max TDP) 105 watts 55 watts
Shader Model 4.0 5.0
Bandwidth 57600 MB/sec 80000 MB/sec
Texel Rate 33600 Mtexels/sec 32640 Mtexels/sec
Pixel Rate 9600 Mpixels/sec 16320 Mpixels/sec

Memory Bandwidth: Memory bandwidth is the max amount of data (in units of MB per second) that can be moved across the external memory interface in a second. The number is worked out by multiplying the card's bus width by its memory speed. If the card has DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This number is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.

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