Published: April 2, 2012 8:49 AM
By Vincent Alzieu
Translated by: Catherine Barraclough
There's no mention on the Samsung website of the fact that there are two different versions of the Galaxy S II—one with a Samsung processor and one with a Texas Instruments processor. This is apparently because Samsung considers that there's no difference between the two processors. However, we've tested both handsets and the results suggest that this may not be the case!

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Samsung Galaxy S II

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We ran 14 existing or home-made benchmark tests on both versions of the Galaxy S II. The intermediate results were then split into around 50 sub-tests, then grouped together into five main criteria for analysis: processing power (CPU), graphics processing power (GPU), memory (MEM), responsiveness (Touchscreen) and battery life.

On the first four criteria, the Galaxy S II i9100 (Samsung processor) showed better performances, with the following lead over its counterpart:

Galaxy s2 i9100 differences

How can two dual-core processors, both with 1.2 GHz clock speeds end up with such a big gap in performance?

In fact, the Samsung handset manages the processor in the i9100G (Texas Instruments processor) in a much more conservative way. While the i9100 often runs at, or close to, its maximum clock rate of 1200 MHz, Samsung prefers to frequently push down the clock rate of the Texas Instruments processor in the i9100G.

Take a look at the two processors' clock rates below, application by application:

galaxy s2

These readings shed some light onto how the two different handsets behave. They also go some way to explaining how Samsung can consider the two processors comparable.

Take the well-known Linpack benchmark, used to evaluate the ability of a processor to handle complex tasks by making use of all its available cores. When pushed hard, both of the CPUs work at full whack—that's 1.2 GHz. Both models therefore end up with very high scores for mobile phones, at around 80 MFlops. In fact, the  i9100G (83 MFlops on average over five Linpack tests) actually finished slightly ahead of the i9100 (79 MFlops).

However, with the Antutu benchmark, while the i9100 runs at its maximum clock rate, the i9100G reduces its clock rate to 800 MHz. Logically, then, the i9100 edges ahead in this head-to-head duel, finishing with an index of 6355 compared with 5000 for the i9100G.

The tests continue!

> Review: Samsung Galaxy S II

> Phone Reviews: Mobiles and Smartphones