When it says "Intel Core 2 Duo 2.0 Ghz" does it mean...?

Question

...that there are 2 cores at 2.0 Ghz, for a combined total of 4.0 Ghz, or the 2 cores equal 2.0 Ghz (Each core at 1.0 Ghz)?

Also, when it says "1.5 Ghz, 1.49 Ghz" in the system properties in WIndows, what does that mean?

Answer 1

Your system is still running at a maximum computational speed of 2GHz. In theory you have 4GHz but that is if you are running 2 applications at once at 100% load. So each core runs at the reported speed. In your case, it is 1.49GHz.

If this is a desktop you can 'overclock' it and get more juice out of it. But if it is a laptop then most likely you won't want to add more speed to it since saving battery power matters most (higher GHz means higher power usage).

Answer 2

OK, now for your real answer. You have 2 cores running at 2.0 GHz. In theory if you run a program that has been designed for multiple threads your computer will run this almost twice as fast as a single core at 2.0 GHz. If you run a program without multiple threads, it will run at the same speed as the single core CPU.

If your reading speeds lower then 2.0 GHz it is because intel uses a feature called speedstep that decreases your CPU clock speed when not needed.

Answer 3

It means you have one processor that has two processing cores. Each operate at 2ghz. It does not mean you have 4ggz of processing power. Each core handles a single task ata time. Your computer can do two things at once. Many programs cannot though, but two different programs can operate at the same time.

Not all processors runt at exactly the specified clock rate (ghz). They are slightly off. System Properties is showing what the processor is reporting as its speed. .01 ghz is statistally insignificant.

Answer 4

Core 2 Duo 2.0ghz

Answer 5

The Core brand refers to Intel's 32-bit mobile dual-core x86 CPUs that derived from the Pentium M branded processors. The Core's microarchitecture was a slightly more advanced version of the Intel P6 architecture, that was eventually superseded by the new Core 2 microarchitecture. It emerged in parallel with the NetBurst (Intel P68) microarchitecture of the Pentium 4 brand, and was a precursor of the 64-bit Core microarchitecture of Core 2 branded CPUs. The Core comprised two branches: the Duo (dual-core) and Solo (Duo with one disabled core, which replaced the Pentium M brand of single-core mobile processor).

The Core brand was launched on January 5, 2006 by the release of the 32-bit Yonah core CPU - Intel's first dual-core mobile (low-power) processor. Its dual-core closely resembled two interconnected Pentium M branded CPUs packaged as a single die (piece) silicon chip (IC). Hence, the 32-bit microarchitecture of Core branded CPUs - contrary to its name - had more in common with Pentium M branded CPUs than with the following 64-bit Core microarchitecture of Core 2 branded CPUs. Despite a major rebranding effort by Intel starting January 2006, some computers with the Yonah core continued to be marked as Pentium M.

In 2007, Intel began branding the Yonah core CPUs as Pentium Dual-Core intended for lower-end mobile only computers, unlike the 64-bit Core microarchitecture CPUs branded as Intel Core 2 Duo (for higher-end computers) and also as Pentium Dual-Core (for lower-end desktops only). In short, the Core brand refers to processors with the "mobile" derivative of 32-bit Intel P6 microarchitecture (preceding the Core microarchitecture), whereas the Intel Core 2 Duo brand refers to CPUs with the 64-bit Core microarchitecture.

September 2006 and January 4, 2008 mark a discontinuation of many Core branded CPUs
The Core 2 brand refers to a range of Intel's consumer 64-bit dual-core and MCM quad-core CPUs with the x86-64 instruction set, and based on the Intel Core microarchitecture, which derived from the 32-bit dual-core Yonah laptop processor. (Note: The Yonah had two interconnected cores, similar to those branded as Pentium M, but comprising a single silicon chip or die.) The 2x2 MCM dual-die quad-core[1] CPU had two separate dual-core dies (CPUs) - next to each other - in one quad-core MCM package. The Core 2 relegated the Pentium brand to a lower-end market, and reunified the laptop and desktop CPU lines divided into the Pentium 4, D, and M brands.

The Core microarchitecture returned to lower clock speeds and improved processors' usage of both available clock cycles and power compared with preceding NetBurst of the Pentium 4/D branded CPUs[2]. It translated into more efficient decoding stages, execution units, caches, and buses, etc, reducing the power consumption of Core 2 branded CPUs, while enhancing their processing capacity.

The Core 2 brand was introduced on July 27, 2006comprising of the Solo (single-core), Duo (dual-core), Quad (quad-core), and Extreme (dual- or quad-core CPUs for enthusiasts) branches, as of 2007
The Core 2 branded CPUs include: "Conroe" and "Allendale" (dual-core for higher- and lower-end desktops), "Merom" (dual-core for laptops), "Kentsfield" (quad-core for desktops), and their variants named "Penryn" (dual-core for laptops), "Wolfdale" (dual-core for desktops) and "Yorkfield" (quad-core for desktops). (Note: For the server and workstation "Woodcrest", "Clovertown", and "Tigerton" CPUs see the Xeon brand
The Core 2 branded processors featured the Virtualization Technology (except T52x0, T5300, T54x0, T5500 with stepping "B2", E2xx0 and E4x00 models), Execute Disable Bit, and SSE3. Their Core microarchitecture introduced also SSSE3, Trusted Execution Technology, Enhanced SpeedStep, and Active Management Technology (iAMT2). With a Thermal Design Power (TDP) of up to only 65 W, the Core 2 dual-core Conroe consumed only half the power of less capable, but also dual-core Pentium D-branded desktop chips[6] with a TDP of up to 130 W[7] (a high TDP requires additional cooling that can be noisy or expensive).

Typically for CPUs, the Core 2 Duo E4000/E6000, Core 2 Quad Q6600, Core 2 Extreme dual-core X6800, and quad-core QX6700 and QX6800 CPUs were affected by minor bugs