GeForce GT 640 DDR3 vs Radeon R9 270

Intro

Compare that to the Radeon R9 270, which comes with core speeds of 900 MHz on the GPU, and 1400 MHz on the 2048 MB of GDDR5 RAM. It features 1280 SPUs as well as 80 TAUs and 32 Rasterization Operator Units.

Display Graphs

Hide Graphs

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 R9 270		5943 points
GeForce GT 640 DDR3		1560 points
	Difference: 4383 (281%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 640 DDR3		65 Watts
Radeon R9 270		150 Watts
	Difference: 85 Watts (131%)

Memory Bandwidth

The Radeon R9 270 should theoretically perform a lot faster than the GeForce GT 640 DDR3 overall. (explain)

Radeon R9 270		179200 MB/sec
GeForce GT 640 DDR3		57024 MB/sec
	Difference: 122176 (214%)

Texel Rate

The Radeon R9 270 is a lot (about 150%) more effective at AF than the GeForce GT 640 DDR3. (explain)

Radeon R9 270		72000 Mtexels/sec
GeForce GT 640 DDR3		28800 Mtexels/sec
	Difference: 43200 (150%)

Pixel Rate

The Radeon R9 270 should be quite a bit (about 100%) more effective at full screen anti-aliasing than the GeForce GT 640 DDR3, and will be capable of handling higher screen resolutions while still performing well. (explain)

Radeon R9 270		28800 Mpixels/sec
GeForce GT 640 DDR3		14400 Mpixels/sec
	Difference: 14400 (100%)

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: Bandwidth is the largest amount of data (in units of megabytes per second) that can be transported past the external memory interface within a second. The number is worked out by multiplying the card's interface width by its memory speed. If the card has DDR 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, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called 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, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.