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GeForce 9800 GTX+ vs Radeon HD 4830 512MB

Intro

The GeForce 9800 GTX+ features core clock speeds of 738 MHz on the GPU, and 1100 MHz on the 512 MB of GDDR3 memory. It features 128 SPUs as well as 64 Texture Address Units and 16 ROPs.

Compare all of that to the Radeon HD 4830 512MB, which has a GPU core clock speed of 575 MHz, and 512 MB of GDDR3 memory running at 900 MHz through a 256-bit bus. It also is made up of 640(128x5) Stream Processors, 32 Texture Address Units, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4830 512MB 95 Watts
GeForce 9800 GTX+ 145 Watts
Difference: 50 Watts (53%)

Memory Bandwidth

In theory, the GeForce 9800 GTX+ will be 22% faster than the Radeon HD 4830 512MB overall, because of its greater data rate. (explain)

GeForce 9800 GTX+ 70400 MB/sec
Radeon HD 4830 512MB 57600 MB/sec
Difference: 12800 (22%)

Texel Rate

The GeForce 9800 GTX+ will be a lot (about 157%) more effective at texture filtering than the Radeon HD 4830 512MB. (explain)

GeForce 9800 GTX+ 47232 Mtexels/sec
Radeon HD 4830 512MB 18400 Mtexels/sec
Difference: 28832 (157%)

Pixel Rate

The GeForce 9800 GTX+ should be quite a bit (approximately 28%) more effective at FSAA than the Radeon HD 4830 512MB, and also capable of handling higher resolutions without losing too much performance. (explain)

GeForce 9800 GTX+ 11808 Mpixels/sec
Radeon HD 4830 512MB 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 512MB

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 512MB
Manufacturer nVidia AMD
Year July 2008 Oct 21, 2008
Code Name G92b RV770 LE
Memory 512 MB 512 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 GDDR3
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 largest amount of information (measured in megabytes per second) that can be moved across the external memory interface in a second. The number is worked out by multiplying the bus width by its memory speed. In the case of DDR memory, it should be multiplied by 2 once again. If it uses 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 amount of texture map elements (texels) that are applied per second. This 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 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 card can possibly write to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

Hide Prices

GeForce 9800 GTX+

Amazon.com

Check prices at:

Radeon HD 4830 512MB

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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