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GeForce 9800 GT 1GB vs GeForce GT 440 1.5GB

Intro

The GeForce 9800 GT 1GB makes use of a 65/55 nm design. nVidia has clocked the core frequency at 600 MHz. The GDDR3 memory runs at a speed of 900 MHz on this specific card. It features 112 SPUs as well as 56 Texture Address Units and 16 Rasterization Operator Units.

Compare those specs to the GeForce GT 440 1.5GB, which has a core clock frequency of 594 MHz and a GDDR3 memory frequency of 900 MHz. It also makes use of a 192-bit bus, and makes use of a 40 nm design. It is comprised of 144 SPUs, 24 Texture Address Units, 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

Performance-wise, the GeForce 9800 GT 1GB should theoretically be quite a bit better than the GeForce GT 440 1.5GB in general. (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 should be quite a bit (about 136%) better at texture filtering 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

If using lots of anti-aliasing is important to you, then the GeForce GT 440 1.5GB is the winner, by far. (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: Bandwidth is the maximum amount of information (counted in MB per second) that can be transferred over the external memory interface within a second. The number is worked out by multiplying the card's bus width by its memory speed. If the card has DDR memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, 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 number of texture map elements (texels) that are applied per second. This is worked out by multiplying the total texture units by the core speed of the chip. The better this number, the better the card will be at handling 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 worked out by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach 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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