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Geforce GTX 670 vs Radeon HD 4890 1GB

Intro

The Geforce GTX 670 features a GPU core clock speed of 915 MHz, and the 2048 MB of GDDR5 RAM runs at 1500 MHz through a 256-bit bus. It also is comprised of 1344 Stream Processors, 112 Texture Address Units, and 32 ROPs.

Compare those specs to the Radeon HD 4890 1GB, which features GPU core speed of 1000 MHz, and 1024 MB of GDDR5 memory running at 975 MHz through a 256-bit bus. It also is made up of 800(160x5) Stream Processors, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Geforce GTX 670 170 Watts
Radeon HD 4890 1GB 190 Watts
Difference: 20 Watts (12%)

Memory Bandwidth

The Geforce GTX 670, in theory, should be a lot faster than the Radeon HD 4890 1GB in general. (explain)

Geforce GTX 670 192000 MB/sec
Radeon HD 4890 1GB 124800 MB/sec
Difference: 67200 (54%)

Texel Rate

The Geforce GTX 670 should be much (about 156%) better at AF than the Radeon HD 4890 1GB. (explain)

Geforce GTX 670 102480 Mtexels/sec
Radeon HD 4890 1GB 40000 Mtexels/sec
Difference: 62480 (156%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Geforce GTX 670 is a better choice, by far. (explain)

Geforce GTX 670 29280 Mpixels/sec
Radeon HD 4890 1GB 16000 Mpixels/sec
Difference: 13280 (83%)

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 GTX 670

Amazon.com

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Radeon HD 4890 1GB

Amazon.com

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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 GTX 670 Radeon HD 4890 1GB
Manufacturer nVidia AMD
Year May 2012 Apr 2, 2009
Code Name GK104 RV790 XT
Memory 2048 MB 1024 MB
Core Speed 915 MHz 1000 MHz
Memory Speed 6000 MHz 3900 MHz
Power (Max TDP) 170 watts 190 watts
Bandwidth 192000 MB/sec 124800 MB/sec
Texel Rate 102480 Mtexels/sec 40000 Mtexels/sec
Pixel Rate 29280 Mpixels/sec 16000 Mpixels/sec
Unified Shaders 1344 800(160x5)
Texture Mapping Units 112 40
Render Output Units 32 16
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 28 nm 55 nm
Transistors 3540 million 959 million
Bus PCIe 3.0 x16 PCIe 2.0 x16
DirectX Version DirectX 11.0 DirectX 10.1
OpenGL Version OpenGL 4.2 OpenGL 3.0

Memory Bandwidth: Bandwidth is the max amount of information (measured in megabytes per second) that can be transported over the external memory interface in a second. It's calculated by multiplying the card's bus width by its memory speed. 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 card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This is worked out by multiplying the total number of 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 handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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Geforce GTX 670

Amazon.com

Check prices at:

Radeon HD 4890 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.

Comments

One Response to “Geforce GTX 670 vs Radeon HD 4890 1GB”
Antero says:

I have both cards on my Desktop
I buyed in 12/2012
Cpu: Intel Core i5 3570K
MoBo: Asus P8z77-vlk
And GPU: Club Ati Radeon 4890 1 GB
3D mark Vantage give GpuScore 11 901, with game booster
I buyed last month Gigabyte GeForce GTX 670 x3(Cooler is x3, not 3xsli)
3D Mark Vantage give about 32 207 without tweaks like Gamebooster.

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