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GeForce 9800 GT 512MB vs GeForce GTX 750

Intro

The GeForce 9800 GT 512MB comes with a core clock frequency of 600 MHz and a GDDR3 memory frequency of 900 MHz. It also makes use of a 256-bit bus, and uses a 65/55 nm design. It is comprised of 112 SPUs, 56 Texture Address Units, and 16 Raster Operation Units.

Compare that to the GeForce GTX 750, which features clock speeds of 1020 MHz on the GPU, and 1250 MHz on the 1024 MB of GDDR5 RAM. It features 512 SPUs as well as 32 TAUs and 16 ROPs.

Display Graphs

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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

In theory, the GeForce GTX 750 will be 39% faster than the GeForce 9800 GT 512MB overall, due to its greater data rate. (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 a little bit (more or less 3%) better at texture filtering 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 using high levels of AA is important to you, then the GeForce GTX 750 is superior to the GeForce 9800 GT 512MB, 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

Display Prices

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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

Display Specifications

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Model GeForce 9800 GT 512MB GeForce GTX 750
Manufacturer nVidia nVidia
Year July 2008 February 2014
Code Name G92a/b GM107
Memory 512 MB 1024 MB
Core Speed 600 MHz 1020 MHz
Memory Speed 1800 MHz 5000 MHz
Power (Max TDP) 105 watts 55 watts
Bandwidth 57600 MB/sec 80000 MB/sec
Texel Rate 33600 Mtexels/sec 32640 Mtexels/sec
Pixel Rate 9600 Mpixels/sec 16320 Mpixels/sec
Unified Shaders 112 512
Texture Mapping Units 56 32
Render Output Units 16 16
Bus Type GDDR3 GDDR5
Bus Width 256-bit 128-bit
Fab Process 65/55 nm 28 nm
Transistors 754 million 1870 million
Bus PCIe x16 2.0 PCIe 3.0 x16
DirectX Version DirectX 10 DirectX 11.0
OpenGL Version OpenGL 3.0 OpenGL 4.4

Memory Bandwidth: Bandwidth is the max amount of information (counted in MB per second) that can be transported over the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory speed. If it uses DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines 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 output rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.

Comments

One Response to “GeForce 9800 GT 512MB vs GeForce GTX 750”
yackaro says:

i am going to upgrade from the 9800 GT 512M from XFX (their wierd version that somehow runs without a power connector yet its the regular version rather than the green edition) to an EVGA GTX 750 FTW edition w/ACX cooling. All I can find about it other than newegg is reviews and unboxing etc. for the 750 ti version. maybe since its exclusive to newegg and requires more than zero effort to find, noone else has bought it yet? its on sale for $99.99, so that's why I got it instead of one of the more "regular" GTX 750's (the shorter ones w/out the 6-pin input). Will make unboxing videoas soon as it arrives on the 23rd of the month/year this comment was typed in (December 2014). I seriously hope it includes a molex to 6-pin adapter, my POS dell PSU only has a single 4-pin connector.

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