GeForce GT 640 DDR3 vs Radeon R9 280X

Intro

Compare those specs to the Radeon R9 280X, which features core speeds of 850 MHz on the GPU, and 1500 MHz on the 3072 MB of GDDR5 RAM. It features 2048 SPUs along with 128 Texture Address Units and 32 ROPs.

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 280X		8886 points
GeForce GT 640 DDR3		1560 points
	Difference: 7326 (470%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 640 DDR3		65 Watts
Radeon R9 280X		250 Watts
	Difference: 185 Watts (285%)

Memory Bandwidth

Theoretically, the Radeon R9 280X should be a lot faster than the GeForce GT 640 DDR3 in general. (explain)

Radeon R9 280X		288000 MB/sec
GeForce GT 640 DDR3		57024 MB/sec
	Difference: 230976 (405%)

Texel Rate

The Radeon R9 280X should be quite a bit (more or less 278%) better at AF than the GeForce GT 640 DDR3. (explain)

Radeon R9 280X		108800 Mtexels/sec
GeForce GT 640 DDR3		28800 Mtexels/sec
	Difference: 80000 (278%)

Pixel Rate

The Radeon R9 280X should be quite a bit (about 89%) better at AA than the GeForce GT 640 DDR3, and also should be able to handle higher resolutions better. (explain)

Radeon R9 280X		27200 Mpixels/sec
GeForce GT 640 DDR3		14400 Mpixels/sec
	Difference: 12800 (89%)

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 max amount of data (counted in megabytes per second) that can be moved across the external memory interface in a second. The number is calculated by multiplying the card's interface width by the speed of its memory. In the case of DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.