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GeForce 9800 GT 1GB vs GeForce GT 440 1.5GB

Intro

The GeForce 9800 GT 1GB features a GPU core speed of 600 MHz, and the 1024 MB of GDDR3 RAM runs at 900 MHz through a 256-bit bus. It also is made up of 112 Stream Processors, 56 TAUs, and 16 Raster Operation Units.

Compare those specifications to the GeForce GT 440 1.5GB, which comes with GPU core speed of 594 MHz, and 1536 MB of GDDR3 RAM running at 900 MHz through a 192-bit bus. It also is made up of 144 Stream Processors, 24 TAUs, and 24 ROPs.

(No game benchmarks for this combination yet.)

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

Theoretically speaking, the GeForce 9800 GT 1GB should be quite a bit faster than 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 quite a bit (about 136%) faster with regards to 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 should be quite a bit (approximately 49%) more effective at anti-aliasing than the GeForce 9800 GT 1GB, and able to handle higher screen resolutions without losing too much performance. (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

Amazon.com

GeForce GT 440 1.5GB

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 1GB GeForce GT 440 1.5GB
Manufacturer nVidia nVidia
Year July 2008 October 2010
Code Name G92a/b GF106
Fab Process 65/55 nm 40 nm
Bus PCIe x16 2.0 PCIe x16
Memory 1024 MB 1536 MB
Core Speed 600 MHz 594 MHz
Shader Speed 1500 MHz 1189 MHz
Memory Speed 900 MHz (1800 MHz effective) 900 MHz (1800 MHz effective)
Unified Shaders 112 144
Texture Mapping Units 56 24
Render Output Units 16 24
Bus Type GDDR3 GDDR3
Bus Width 256-bit 192-bit
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 4.1
Power (Max TDP) 105 watts 56 watts
Shader Model 4.0 5.0
Bandwidth 57600 MB/sec 43200 MB/sec
Texel Rate 33600 Mtexels/sec 14256 Mtexels/sec
Pixel Rate 9600 Mpixels/sec 14256 Mpixels/sec

Memory Bandwidth: Memory bandwidth is the largest amount of data (measured in MB per second) that can be transferred across the external memory interface in one second. It is worked out by multiplying the bus width by the speed of its memory. If the card has DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the 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 number is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.

Comments

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