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GeForce 9800 GTX vs GeForce GTS 250 1GB


Intro

The GeForce 9800 GTX comes with a clock frequency of 675 MHz and a GDDR3 memory frequency of 1100 MHz. It also makes use of a 256-bit memory bus, and uses a 65 nm design. It features 128 SPUs, 64 Texture Address Units, and 16 Raster Operation Units.

Compare those specifications to the GeForce GTS 250 1GB, which features a GPU core clock speed of 738 MHz, and 1024 MB of GDDR3 memory set to run at 1100 MHz through a 256-bit bus. It also is comprised of 128 Stream Processors, 64 TAUs, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9800 GTX 140 Watts
GeForce GTS 250 1GB 145 Watts
Difference: 5 Watts (4%)

Memory Bandwidth

Both cards have the exact same memory bandwidth, so theoretically they should have identical performance. (explain)

Texel Rate

The GeForce GTS 250 1GB should be a small bit (approximately 9%) better at texture filtering than the GeForce 9800 GTX. (explain)

GeForce GTS 250 1GB 47232 Mtexels/sec
GeForce 9800 GTX 43200 Mtexels/sec
Difference: 4032 (9%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTS 250 1GB is a better choice, though not by far. (explain)

GeForce GTS 250 1GB 11808 Mpixels/sec
GeForce 9800 GTX 10800 Mpixels/sec
Difference: 1008 (9%)

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 GTX

GeForce GTS 250 1GB

Specifications

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Model GeForce 9800 GTX GeForce GTS 250 1GB
Manufacturer nVidia nVidia
Year April 2008 March 3, 2009
Code Name G92 G92a/b
Memory 512 MB 1024 MB
Core Speed 675 MHz 738 MHz
Memory Speed 2200 MHz 2200 MHz
Power (Max TDP) 140 watts 145 watts
Bandwidth 70400 MB/sec 70400 MB/sec
Texel Rate 43200 Mtexels/sec 47232 Mtexels/sec
Pixel Rate 10800 Mpixels/sec 11808 Mpixels/sec
Unified Shaders 128 128
Texture Mapping Units 64 64
Render Output Units 16 16
Bus Type GDDR3 GDDR3
Bus Width 256-bit 256-bit
Fab Process 65 nm 65/55 nm
Transistors 754 million 754 million
Bus PCIe x16 2.0 PCIe x16 2.0
DirectX Version DirectX 10 DirectX 10
OpenGL Version OpenGL 3.0 OpenGL 3.1

Memory Bandwidth: Bandwidth is the max amount of information (measured in MB per second) that can be moved across the external memory interface within a second. It's worked out by multiplying the interface width by its memory clock speed. If it uses DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This is calculated by multiplying the total texture units of the card 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 in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to its 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 card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.

GeForce 9800 GTX

GeForce GTS 250 1GB

Comments

2 Responses to “GeForce 9800 GTX vs GeForce GTS 250 1GB”
comparativa de vga ayuda !! says:

[...] [...]

tensai says:

they're almost the same thing, i think i'll go with the gtx 250...but the gtx 9800 is also a good choice!!

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