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Radeon HD 4890 2GB vs Radeon R7 M260X

Intro

The Radeon HD 4890 2GB features a core clock speed of 1000 MHz and a GDDR5 memory frequency of 975 MHz. It also makes use of a 256-bit bus, and uses a 55 nm design. It is made up of 800(160x5) SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

Compare those specs to the Radeon R7 M260X, which comes with a GPU core clock speed of 825 MHz, and 2048 MB of GDDR5 memory set to run at 1000 MHz through a 128-bit bus. It also is made up of 384 SPUs, 24 TAUs, and 8 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the Radeon HD 4890 2GB should theoretically be much better than the Radeon R7 M260X overall. (explain)

Radeon HD 4890 2GB 124800 MB/sec
Radeon R7 M260X 64000 MB/sec
Difference: 60800 (95%)

Texel Rate

The Radeon HD 4890 2GB will be quite a bit (about 102%) better at texture filtering than the Radeon R7 M260X. (explain)

Radeon HD 4890 2GB 40000 Mtexels/sec
Radeon R7 M260X 19800 Mtexels/sec
Difference: 20200 (102%)

Pixel Rate

The Radeon HD 4890 2GB will be quite a bit (approximately 142%) faster with regards to anti-aliasing than the Radeon R7 M260X, and should be capable of handling higher screen resolutions while still performing well. (explain)

Radeon HD 4890 2GB 16000 Mpixels/sec
Radeon R7 M260X 6600 Mpixels/sec
Difference: 9400 (142%)

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 2GB

Amazon.com

Check prices at:

Radeon R7 M260X

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 2GB Radeon R7 M260X
Manufacturer AMD AMD
Year Apr 2, 2009 June 2014
Code Name RV790 XT Opal
Memory 2048 MB 2048 MB
Core Speed 1000 MHz 825 MHz
Memory Speed 3900 MHz 4000 MHz
Power (Max TDP) 190 watts (Unknown) watts
Bandwidth 124800 MB/sec 64000 MB/sec
Texel Rate 40000 Mtexels/sec 19800 Mtexels/sec
Pixel Rate 16000 Mpixels/sec 6600 Mpixels/sec
Unified Shaders 800(160x5) 384
Texture Mapping Units 40 24
Render Output Units 16 8
Bus Type GDDR5 GDDR5
Bus Width 256-bit 128-bit
Fab Process 55 nm 28 nm
Transistors 959 million (Unknown) million
Bus PCIe 2.0 x16 PCIe 3.0 x8
DirectX Version DirectX 10.1 DirectX 11.2
OpenGL Version OpenGL 3.0 OpenGL 4.3

Memory Bandwidth: Bandwidth is the max amount of data (measured in MB per second) that can be moved across the external memory interface in a second. The number is worked out by multiplying the interface width by the speed of its memory. If the card has DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen 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 number of texture units of the card by the core speed of the chip. The better the texel rate, the better the card will be at 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 can possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 4890 2GB

Amazon.com

Check prices at:

Radeon R7 M260X

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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