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GeForce GT 640 DDR3 vs Radeon R7 M265

Intro

The GeForce GT 640 DDR3 features a clock speed of 900 MHz and a DDR3 memory frequency of 1782 MHz. It also makes use of a 128-bit bus, and uses a 28 nm design. It is made up of 384 SPUs, 32 Texture Address Units, and 16 Raster Operation Units.

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

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon R7 M265 3256 points
GeForce GT 640 DDR3 1560 points
Difference: 1696 (109%)

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the GeForce GT 640 DDR3 should theoretically be quite a bit superior to the Radeon R7 M265 overall. (explain)

GeForce GT 640 DDR3 57024 MB/sec
Radeon R7 M265 32000 MB/sec
Difference: 25024 (78%)

Texel Rate

The GeForce GT 640 DDR3 is a lot (approximately 66%) faster with regards to anisotropic filtering than the Radeon R7 M265. (explain)

GeForce GT 640 DDR3 28800 Mtexels/sec
Radeon R7 M265 17400 Mtexels/sec
Difference: 11400 (66%)

Pixel Rate

The GeForce GT 640 DDR3 should be quite a bit (about 148%) more effective at full screen anti-aliasing than the Radeon R7 M265, and also should be capable of handling higher screen resolutions better. (explain)

GeForce GT 640 DDR3 14400 Mpixels/sec
Radeon R7 M265 5800 Mpixels/sec
Difference: 8600 (148%)

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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GeForce GT 640 DDR3

Amazon.com

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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 GeForce GT 640 DDR3 Radeon R7 M265
Manufacturer nVidia AMD
Year June 2012 May 1 2014
Code Name GK107 Opal XT
Memory 2048 MB 2048 MB
Core Speed 900 MHz 725 MHz
Memory Speed 3564 MHz 2000 MHz
Power (Max TDP) 65 watts (Unknown) watts
Bandwidth 57024 MB/sec 32000 MB/sec
Texel Rate 28800 Mtexels/sec 17400 Mtexels/sec
Pixel Rate 14400 Mpixels/sec 5800 Mpixels/sec
Unified Shaders 384 384
Texture Mapping Units 32 24
Render Output Units 16 8
Bus Type DDR3 DDR3
Bus Width 128-bit 128-bit
Fab Process 28 nm 28 nm
Transistors 1300 million (Unknown) million
Bus PCIe 3.0 x16 PCIe 3.0 x8
DirectX Version DirectX 11.0 DirectX 11.2
OpenGL Version OpenGL 4.2 OpenGL 4.3

Memory Bandwidth: Bandwidth is the max amount of data (counted in megabytes per second) that can be transported over the external memory interface within a second. The number is calculated by multiplying the bus width by its memory speed. If it uses DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out 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 outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

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GeForce GT 640 DDR3

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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