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GeForce 9800 GT 1GB vs GeForce GT 440 1.5GB

Intro

The GeForce 9800 GT 1GB uses a 65/55 nm design. nVidia has clocked the core frequency at 600 MHz. The GDDR3 memory is set to run at a frequency of 900 MHz on this particular card. It features 112 SPUs along with 56 TAUs and 16 ROPs.

Compare those specs to the GeForce GT 440 1.5GB, which features core clock speeds of 594 MHz on the GPU, and 900 MHz on the 1536 MB of GDDR3 RAM. It features 144 SPUs along with 24 Texture Address Units and 24 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 440 1.5GB 56 Watts
GeForce 9800 GT 1GB 105 Watts
Difference: 49 Watts (88%)

Memory Bandwidth

Performance-wise, the GeForce 9800 GT 1GB should theoretically be much superior to the GeForce GT 440 1.5GB overall. (explain)

GeForce 9800 GT 1GB 57600 MB/sec
GeForce GT 440 1.5GB 43200 MB/sec
Difference: 14400 (33%)

Texel Rate

The GeForce 9800 GT 1GB is a lot (about 136%) more effective at AF than the GeForce GT 440 1.5GB. (explain)

GeForce 9800 GT 1GB 33600 Mtexels/sec
GeForce GT 440 1.5GB 14256 Mtexels/sec
Difference: 19344 (136%)

Pixel Rate

The GeForce GT 440 1.5GB will be quite a bit (approximately 49%) faster with regards to anti-aliasing than the GeForce 9800 GT 1GB, and also will be capable of handling higher resolutions more effectively. (explain)

GeForce GT 440 1.5GB 14256 Mpixels/sec
GeForce 9800 GT 1GB 9600 Mpixels/sec
Difference: 4656 (49%)

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 1GB

GeForce GT 440 1.5GB

Specifications

Display Specifications

Hide Specifications

Model GeForce 9800 GT 1GB GeForce GT 440 1.5GB
Manufacturer nVidia nVidia
Year July 2008 October 2010
Code Name G92a/b GF106
Memory 1024 MB 1536 MB
Core Speed 600 MHz 594 MHz
Memory Speed 1800 MHz 1800 MHz
Power (Max TDP) 105 watts 56 watts
Bandwidth 57600 MB/sec 43200 MB/sec
Texel Rate 33600 Mtexels/sec 14256 Mtexels/sec
Pixel Rate 9600 Mpixels/sec 14256 Mpixels/sec
Unified Shaders 112 144
Texture Mapping Units 56 24
Render Output Units 16 24
Bus Type GDDR3 GDDR3
Bus Width 256-bit 192-bit
Fab Process 65/55 nm 40 nm
Transistors 754 million 1170 million
Bus PCIe x16 2.0 PCIe x16
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the largest amount of information (measured in megabytes per second) that can be moved across the external memory interface in a second. It is calculated by multiplying the interface width by its memory clock speed. If the card has DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This figure is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels 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. The number is worked out by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as 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, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.

GeForce 9800 GT 1GB

GeForce GT 440 1.5GB

Comments

One Response to “GeForce 9800 GT 1GB vs GeForce GT 440 1.5GB”
saf aesfeaw says:

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