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Radeon HD 4850 1GB vs Radeon R9 M265X

Intro

The Radeon HD 4850 1GB makes use of a 55 nm design. AMD has clocked the core speed at 625 MHz. The GDDR4 RAM runs at a frequency of 993 MHz on this specific model. It features 800(160x5) SPUs along with 40 TAUs and 16 ROPs.

Compare that to the Radeon R9 M265X, which makes use of a 28 nm design. AMD has set the core frequency at 575 MHz. The GDDR5 RAM runs at a frequency of 1125 MHz on this particular model. It features 640 SPUs as well as 40 TAUs and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon R9 M265X should in theory be a bit faster than the Radeon HD 4850 1GB in general. (explain)

Radeon R9 M265X 72000 MB/sec
Radeon HD 4850 1GB 63552 MB/sec
Difference: 8448 (13%)

Texel Rate

The Radeon HD 4850 1GB is just a bit (approximately 9%) better at AF than the Radeon R9 M265X. (explain)

Radeon HD 4850 1GB 25000 Mtexels/sec
Radeon R9 M265X 23000 Mtexels/sec
Difference: 2000 (9%)

Pixel Rate

The Radeon HD 4850 1GB is just a bit (approximately 9%) faster with regards to AA than the Radeon R9 M265X, and also capable of handling higher resolutions without slowing down too much. (explain)

Radeon HD 4850 1GB 10000 Mpixels/sec
Radeon R9 M265X 9200 Mpixels/sec
Difference: 800 (9%)

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 4850 1GB

Amazon.com

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Radeon R9 M265X

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 4850 1GB Radeon R9 M265X
Manufacturer AMD AMD
Year Jun 25, 2008 May 1 2014
Code Name RV770 PRO Venus Pro
Memory 1024 MB 2048 MB
Core Speed 625 MHz 575 MHz
Memory Speed 1986 MHz 4500 MHz
Power (Max TDP) 110 watts (Unknown) watts
Bandwidth 63552 MB/sec 72000 MB/sec
Texel Rate 25000 Mtexels/sec 23000 Mtexels/sec
Pixel Rate 10000 Mpixels/sec 9200 Mpixels/sec
Unified Shaders 800(160x5) 640
Texture Mapping Units 40 40
Render Output Units 16 16
Bus Type GDDR4 GDDR5
Bus Width 256-bit 128-bit
Fab Process 55 nm 28 nm
Transistors 956 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 data (measured in MB per second) that can be transported across the external memory interface in a second. The number is calculated by multiplying the interface width by its memory speed. In the case of DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, 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 amount of texture map elements (texels) that are applied in one second. This number is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, the better the video 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 amount of pixels the video card could possibly record to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the core 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 rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

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Radeon HD 4850 1GB

Amazon.com

Check prices at:

Radeon R9 M265X

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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