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GeForce 9800 GT 512MB vs GeForce GTX 750

Intro

The GeForce 9800 GT 512MB has core clock speeds of 600 MHz on the GPU, and 900 MHz on the 512 MB of GDDR3 RAM. It features 112 SPUs as well as 56 TAUs and 16 Rasterization Operator Units.

Compare that to the GeForce GTX 750, which uses a 28 nm design. nVidia has clocked the core speed at 1020 MHz. The GDDR5 RAM is set to run at a frequency of 1250 MHz on this specific model. It features 512 SPUs along with 32 TAUs and 16 ROPs.

(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

Performance-wise, the GeForce GTX 750 should in theory be much better than the GeForce 9800 GT 512MB overall. (explain)

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

Texel Rate

The GeForce 9800 GT 512MB will be a little bit (about 3%) faster with regards to 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

The GeForce GTX 750 is a lot (approximately 70%) faster with regards to full screen anti-aliasing than the GeForce 9800 GT 512MB, and also should be capable of handling higher resolutions without losing too much performance. (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: Bandwidth is the largest amount of data (measured in MB per second) that can be moved past the external memory interface within a second. It's worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This number is calculated by multiplying the total amount of texture units by the core speed of the chip. The better the texel rate, the better the video card will be at 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 graphics card can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

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