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Radeon HD 4670 512MB vs Radeon R7 M265

Intro

The Radeon HD 4670 512MB features core speeds of 750 MHz on the GPU, and 1000 MHz on the 512 MB of GDDR4/GDDR3/DDR3/DDR2 RAM. It features 320(64x5) SPUs as well as 32 Texture Address Units and 8 Rasterization Operator Units.

Compare all of that to the Radeon R7 M265, which has a clock speed of 725 MHz and a DDR3 memory frequency of 1000 MHz. It also uses a 128-bit memory bus, and uses a 28 nm design. It features 384 SPUs, 24 Texture Address Units, and 8 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Both cards have exactly the same bandwidth, so in theory they should perform the same. (explain)

Texel Rate

The Radeon HD 4670 512MB should be much (more or less 38%) better at anisotropic filtering than the Radeon R7 M265. (explain)

Radeon HD 4670 512MB 24000 Mtexels/sec
Radeon R7 M265 17400 Mtexels/sec
Difference: 6600 (38%)

Pixel Rate

The Radeon HD 4670 512MB will be a bit (more or less 3%) better at full screen anti-aliasing than the Radeon R7 M265, and also able to handle higher resolutions without losing too much performance. (explain)

Radeon HD 4670 512MB 6000 Mpixels/sec
Radeon R7 M265 5800 Mpixels/sec
Difference: 200 (3%)

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 4670 512MB

Amazon.com

Check prices at:

Radeon R7 M265

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 4670 512MB Radeon R7 M265
Manufacturer AMD AMD
Year Sep 10, 2008 May 1 2014
Code Name RV730 XT Opal XT
Memory 512 MB 2048 MB
Core Speed 750 MHz 725 MHz
Memory Speed 2000 MHz 2000 MHz
Power (Max TDP) 70 watts (Unknown) watts
Bandwidth 32000 MB/sec 32000 MB/sec
Texel Rate 24000 Mtexels/sec 17400 Mtexels/sec
Pixel Rate 6000 Mpixels/sec 5800 Mpixels/sec
Unified Shaders 320(64x5) 384
Texture Mapping Units 32 24
Render Output Units 8 8
Bus Type GDDR4/GDDR3/DDR3/DDR2 DDR3
Bus Width 128-bit 128-bit
Fab Process 55 nm 28 nm
Transistors 514 million (Unknown) million
Bus PCIe 2.0 x16, AGP 8x PCIe 3.0 x8
DirectX Version DirectX 10.1 DirectX 11.2
OpenGL Version OpenGL 3.0 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the max amount of information (counted in megabytes per second) that can be moved past the external memory interface within a second. It's worked out by multiplying the bus width by its memory clock speed. If the card has DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, 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 amount of texture map elements (texels) that are applied in one second. This is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines 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 output rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

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Radeon HD 4670 512MB

Amazon.com

Check prices at:

Radeon R7 M265

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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