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My motherboard has 2 ram slots . Why does CPU-Z and Speccy show that I have 4 slots ?

Gigabyte GA G41 MT S2P

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up vote 15 down vote accepted

According to CPU-Z's documentation, the information it gathers from the motherboard is the following:

  • Vendor, model and revision.
  • BIOS model and date.
  • Chipset (northbridge and southbridge) and sensor.
  • Graphic interface.

CPU-Z shows 4 RAM slots since your motherboard's northbridge (Intel G41 Express Chipset) can handle up to 4 RAM modules.

The fact that Gigabyte decided to install only 2 RAM slots on this specific motherboard is simply not taken into account.

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That's strange indeed, but the answers in this forum thread sound reasonable:

The chipset can probably handle four sticks, but the board only physically has two.

and

A lot of the inexpensive manufacturers will omit parts on the PCB itself to cut costs.

So, basically, CPU-Z and Speccy show to you what would be possible (using the information about/from the chipset), but the actual configuration the manufacturer chose can be different.

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1  
This isn't as uncommon as you think. Market segmentation is like Marketing -101. – surfasb Dec 21 '11 at 15:31

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