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Radeon HD 4890 1GB vs Radeon R7 260X

Intro

The Radeon HD 4890 1GB uses a 55 nm design. AMD has clocked the core frequency at 1000 MHz. The GDDR5 memory works at a speed of 975 MHz on this specific card. It features 800(160x5) SPUs as well as 40 Texture Address Units and 16 Rasterization Operator Units.

Compare those specifications to the Radeon R7 260X, which has a GPU core clock speed of 1100 MHz, and 2048 MB of GDDR5 RAM running at 1625 MHz through a 128-bit bus. It also is comprised of 896 SPUs, 56 TAUs, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 260X 115 Watts
Radeon HD 4890 1GB 190 Watts
Difference: 75 Watts (65%)

Memory Bandwidth

Performance-wise, the Radeon HD 4890 1GB should in theory be a little bit better than the Radeon R7 260X overall. (explain)

Radeon HD 4890 1GB 124800 MB/sec
Radeon R7 260X 104000 MB/sec
Difference: 20800 (20%)

Texel Rate

The Radeon R7 260X is much (approximately 54%) better at anisotropic filtering than the Radeon HD 4890 1GB. (explain)

Radeon R7 260X 61600 Mtexels/sec
Radeon HD 4890 1GB 40000 Mtexels/sec
Difference: 21600 (54%)

Pixel Rate

The Radeon R7 260X is just a bit (about 10%) more effective at FSAA than the Radeon HD 4890 1GB, and also capable of handling higher resolutions better. (explain)

Radeon R7 260X 17600 Mpixels/sec
Radeon HD 4890 1GB 16000 Mpixels/sec
Difference: 1600 (10%)

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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Radeon HD 4890 1GB

Amazon.com

Check prices at:

Radeon R7 260X

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 Radeon HD 4890 1GB Radeon R7 260X
Manufacturer AMD AMD
Year Apr 2, 2009 October 2013
Code Name RV790 XT Bonaire XTX
Memory 1024 MB 2048 MB
Core Speed 1000 MHz 1100 MHz
Memory Speed 3900 MHz 6500 MHz
Power (Max TDP) 190 watts 115 watts
Bandwidth 124800 MB/sec 104000 MB/sec
Texel Rate 40000 Mtexels/sec 61600 Mtexels/sec
Pixel Rate 16000 Mpixels/sec 17600 Mpixels/sec
Unified Shaders 800(160x5) 896
Texture Mapping Units 40 56
Render Output Units 16 16
Bus Type GDDR5 GDDR5
Bus Width 256-bit 128-bit
Fab Process 55 nm 28 nm
Transistors 959 million 2080 million
Bus PCIe 2.0 x16 PCIe 3.0 x16
DirectX Version DirectX 10.1 DirectX 11.2
OpenGL Version OpenGL 3.0 OpenGL 4.3

Memory Bandwidth: Bandwidth is the largest amount of data (counted in MB per second) that can be transported across the external memory interface within a second. It's calculated by multiplying the bus width by its memory clock speed. If it uses DDR type RAM, 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 anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant 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

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Radeon HD 4890 1GB

Amazon.com

Check prices at:

Radeon R7 260X

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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