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Testbed Configuration and Methodology

We decided to undertake this Phenom II X6 1055T overclocking test mostly because we were curious to check out its performance during overclocking. The thing is that 200-dollar six-core AMD offering seems an extremely attractive choice for those enthusiasts who look for maximum performance at a moderate price. Our study of Phenom II X6 1055T frequency potential warmed up our interest even more. This processor proved capable of overclocking by 42% above the nominal frequency. So, Phenom II X6 1055T certainly could be a very appealing overclocker product.

However, do not make any hasty conclusions: Phenom II X6 1055T has very serious competitors. The thing is that the same $200 can also buy you quad-core AMD Phenom II X4 965, Intel Core i5-750, Intel Core 2 Quad Q9500 or even a dual-core Core i5-660. Enthusiasts like all these products just as much, because they can also offer significant performance boost during overclocking.

Phenom II X6 1055T is far not the only processor that can work at 4.0 GHz during overclocking. You can overclock the quad-core AMD Phenom II X4 965 processor to the same exact frequency. Moreover, this CPU belongs to the Black Edition series of processors, which means that it offers a much easier way of increasing its clock speed. Core i5-750 also conquers 4 GHz barrier quite easily. Unlike its elder LGa1156 counterparts it doesn’t support Hyper-Threading technology, but it doesn’t mean that it will be slower than six-core AMD CPU, because Intel processor has strong Intel microarchitecture on its side. For this very reason Core i5-660 is also a pretty interesting solution to overclock. Even though this processor has only two cores, the use of 32 nm process allows its clock speed to be pushed as far as 4.4-4.6 GHz, and Hyper-Threading technology makes it capable of simultaneous processing of up to 4 computational threads. The good old LGA775 CPUs also do not give in. For example, Core 2 Quad Q9500, that can easily work at frequencies around 3.8-4.0 GHz.

Therefore, we measured the performance of our Phenom II X6 1055T processor in the nominal as well as overclocked modes in order to determine its overclocking attractiveness. We will also compare the obtained results against those of its direct competitors also tested in nominal as well as overclocked modes.

Here is a list of hardware and software components we used in our test sessions:

  • CPUs:
    • AMD Phenom II X6 1055T (Thuban, 6 cores/6 threads, 2.8 GHz, 6 MB L3);
    • AMD Phenom II X4 965 (Deneb, 4 cores/4 threads, 3.4 GHz, 6 MB L3);
    • Intel Core i5-750 (Lynnfield, 4 cores/4 threads, 2.66 GHz, 8 MB L3);
    • Intel Core i5-660 (Clarkdale, 2 cores/4 threads, 3.33 GHz, 4 MB L3);
    • Intel Core 2 Quad Q9505 (Yorkfield, 4 cores/4 threads, 2.83 GHz, 6 MB L2).
  • CPU cooler: Thermalright Ultra-120 eXtreme с вентилятором Enermax Everest.
  • Mainboards:
    • ASUS M4A89GTD PRO/USB3 (Socket AM3, AMD 890GX + SB850, DDR3 SDRAM);
    • ASUS P7P55D Premium (LGA1156, Intel P55 Express);
    • ASUS P5Q3 (LGA775, Intel P45 Express, DDR3 SDRAM);
    • Gigabyte X58A-UD5 (LGA1366, Intel X58 Express).
  • Memory:  2 x 2 GB, DDR3-1600 SDRAM, 9-9-9-24 (Kingston KHX1600C8D3K2/4GX).
  • Graphics card: ATI Radeon HD 5870.
  • HDD: Western Digital VelociRaptor WD3000HLFS.
  • PSU: Tagan TG880-U33II (880 W).
  • Operating system: Microsoft Windows 7 Ultimate x64.
  • Drivers:
    • Intel Chipset Driver;
    • ATI Catalyst 10.4 Display Driver.

As for the performance tests during overclocking, besides those in the nominal mode, they look as follows:

  • AMD Phenom II X6 1055T overclocked to 4.0 GHz (43 % frequency gain)

  • AMD Phenom II X4 965 overclocked to 4.0 GHz by changing the multiplier (18 % frequency gain)

  • Intel Core i5-750 overclocked to 4.0 GHz (50 % frequency gain)

  • Intel Core i5-660 overclocked to 4.4 GHz (32 % frequency gain)

  • Intel Core 2 Quad Q9505 overclocked to 3.9 GHz (38 % frequency gain)

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