GeForce GT 640 DDR3 vs Radeon R7 260X

Intro

Compare all that to the Radeon R7 260X, which makes use of a 28 nm design. AMD has set the core frequency at 1100 MHz. The GDDR5 RAM is set to run at a frequency of 1625 MHz on this specific model. It features 896 SPUs along with 56 Texture Address Units and 16 ROPs.

Display Graphs

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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 260X		4381 points
GeForce GT 640 DDR3		1560 points
	Difference: 2821 (181%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 640 DDR3		65 Watts
Radeon R7 260X		115 Watts
	Difference: 50 Watts (77%)

Memory Bandwidth

The Radeon R7 260X should in theory perform a lot faster than the GeForce GT 640 DDR3 in general. (explain)

Radeon R7 260X		104000 MB/sec
GeForce GT 640 DDR3		57024 MB/sec
	Difference: 46976 (82%)

Texel Rate

The Radeon R7 260X will be a lot (approximately 114%) faster with regards to anisotropic filtering than the GeForce GT 640 DDR3. (explain)

Radeon R7 260X		61600 Mtexels/sec
GeForce GT 640 DDR3		28800 Mtexels/sec
	Difference: 32800 (114%)

Pixel Rate

The Radeon R7 260X should be much (about 22%) more effective at FSAA than the GeForce GT 640 DDR3, and should be able to handle higher screen resolutions without losing too much performance. (explain)

Radeon R7 260X		17600 Mpixels/sec
GeForce GT 640 DDR3		14400 Mpixels/sec
	Difference: 3200 (22%)

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

Specifications

Memory Bandwidth: Memory bandwidth is the maximum amount of information (in units of MB per second) that can be transferred past the external memory interface in a second. The number is calculated by multiplying the interface width by its memory speed. If the card has DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly write to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.