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GeForce 9800 GTX+ vs Radeon HD 4830 1GB

Intro

The GeForce 9800 GTX+ has a clock frequency of 738 MHz and a GDDR3 memory speed of 1100 MHz. It also makes use of a 256-bit memory bus, and makes use of a 55 nm design. It is comprised of 128 SPUs, 64 Texture Address Units, and 16 ROPs.

Compare all of that to the Radeon HD 4830 1GB, which comes with core speeds of 575 MHz on the GPU, and 900 MHz on the 1024 MB of GDDR4 memory. It features 640(128x5) SPUs along with 32 Texture Address Units and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4830 1GB 95 Watts
GeForce 9800 GTX+ 145 Watts
Difference: 50 Watts (53%)

Memory Bandwidth

Theoretically speaking, the GeForce 9800 GTX+ should be 22% quicker than the Radeon HD 4830 1GB in general, because of its greater bandwidth. (explain)

GeForce 9800 GTX+ 70400 MB/sec
Radeon HD 4830 1GB 57600 MB/sec
Difference: 12800 (22%)

Texel Rate

The GeForce 9800 GTX+ is a lot (approximately 157%) better at texture filtering than the Radeon HD 4830 1GB. (explain)

GeForce 9800 GTX+ 47232 Mtexels/sec
Radeon HD 4830 1GB 18400 Mtexels/sec
Difference: 28832 (157%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce 9800 GTX+ is a better choice, and very much so. (explain)

GeForce 9800 GTX+ 11808 Mpixels/sec
Radeon HD 4830 1GB 9200 Mpixels/sec
Difference: 2608 (28%)

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

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GeForce 9800 GTX+

Amazon.com

Check prices at:

Radeon HD 4830 1GB

Amazon.com

Check prices at:

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

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Model GeForce 9800 GTX+ Radeon HD 4830 1GB
Manufacturer nVidia AMD
Year July 2008 Oct 21, 2008
Code Name G92b RV770 LE
Memory 512 MB 1024 MB
Core Speed 738 MHz 575 MHz
Memory Speed 2200 MHz 1800 MHz
Power (Max TDP) 145 watts 95 watts
Bandwidth 70400 MB/sec 57600 MB/sec
Texel Rate 47232 Mtexels/sec 18400 Mtexels/sec
Pixel Rate 11808 Mpixels/sec 9200 Mpixels/sec
Unified Shaders 128 640(128x5)
Texture Mapping Units 64 32
Render Output Units 16 16
Bus Type GDDR3 GDDR4
Bus Width 256-bit 256-bit
Fab Process 55 nm 55 nm
Transistors 754 million 956 million
Bus PCIe x16 2.0 PCIe 2.0 x16
DirectX Version DirectX 10 DirectX 10.1
OpenGL Version OpenGL 3.0 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the maximum amount of information (counted in megabytes per second) that can be moved over the external memory interface within a second. The number is worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends 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.

Display Prices

Hide Prices

GeForce 9800 GTX+

Amazon.com

Check prices at:

Radeon HD 4830 1GB

Amazon.com

Check prices at:

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.

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