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Radeon HD 4890 1GB vs Radeon R9 M295X

Intro

The Radeon HD 4890 1GB uses a 55 nm design. AMD has clocked the core speed at 1000 MHz. The GDDR5 RAM is set to run at a frequency of 975 MHz on this specific card. It features 800(160x5) SPUs along with 40 TAUs and 16 ROPs.

Compare that to the Radeon R9 M295X, which has GPU clock speed of 750 MHz, and 4096 MB of GDDR5 RAM running at 1375 MHz through a 256-bit bus. It also is made up of 2048 Stream Processors, 128 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M295X 125 Watts
Radeon HD 4890 1GB 190 Watts
Difference: 65 Watts (52%)

Memory Bandwidth

As far as performance goes, the Radeon R9 M295X should theoretically be a lot superior to the Radeon HD 4890 1GB in general. (explain)

Radeon R9 M295X 176000 MB/sec
Radeon HD 4890 1GB 124800 MB/sec
Difference: 51200 (41%)

Texel Rate

The Radeon R9 M295X should be much (approximately 140%) better at texture filtering than the Radeon HD 4890 1GB. (explain)

Radeon R9 M295X 96000 Mtexels/sec
Radeon HD 4890 1GB 40000 Mtexels/sec
Difference: 56000 (140%)

Pixel Rate

The Radeon R9 M295X is a lot (approximately 50%) more effective at FSAA than the Radeon HD 4890 1GB, and also will be capable of handling higher resolutions better. (explain)

Radeon R9 M295X 24000 Mpixels/sec
Radeon HD 4890 1GB 16000 Mpixels/sec
Difference: 8000 (50%)

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 R9 M295X

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 R9 M295X
Manufacturer AMD AMD
Year Apr 2, 2009 2014
Code Name RV790 XT Unknown
Memory 1024 MB 4096 MB
Core Speed 1000 MHz 750 MHz
Memory Speed 3900 MHz 5500 MHz
Power (Max TDP) 190 watts 125 watts
Bandwidth 124800 MB/sec 176000 MB/sec
Texel Rate 40000 Mtexels/sec 96000 Mtexels/sec
Pixel Rate 16000 Mpixels/sec 24000 Mpixels/sec
Unified Shaders 800(160x5) 2048
Texture Mapping Units 40 128
Render Output Units 16 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 55 nm 28 nm
Transistors 959 million (Unknown) 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 maximum amount of information (in units of MB per second) that can be transferred over the external memory interface in one second. The number is worked out by multiplying the bus width by its memory clock speed. If it uses DDR memory, it should be multiplied by 2 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 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 processed in one second. This is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the graphics 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 most pixels that the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

Hide Prices

Radeon HD 4890 1GB

Amazon.com

Check prices at:

Radeon R9 M295X

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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