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The Intel D101GGC motherboard has a Front Side Bus MAXIMUM frequency rate of 800MegaHertz. (FSB max rate is 800MHz)

Therefore, it depends on the PROCESSOR that is being used, as to what frequency rate of Ram Memory that can be used.

[ Excuse me. Frequency Rate = 'Speed'. The layman's term ]

Ram Memory typically operates at HALF of the frequency rate, of the FRONT SIDE BUS for the Processor.

Have a Processor that has a maximum FSB frequency rate of 800MHz?
You can use Ram Memory that operates at a frequency rate of 400MHz, or 333MHz. (Do recommend using PC3200, however)

Have a Processor that has a Maximum frequency rate of 533MHz?
You can use DDR Sdram at 333MHz. (PC2700)

The Intel D101GGC uses DDR Sdram ram memory.
DDR Sdram at 333MegaHertz = PC2700
DDR Sdram at 400MHz = PC3200

There are TWO ram memory expansion slots.
The MAXIMUM for EACH ram memory slot is 1GigaByte. (1GB)
The Maximum TOTAL Amount for the motherboard is 2GB.

ALWAYS make SURE you have a ram memory module ('Stick'), in Slot 1 (DIMM 1)
A Processor reads Slot 1 first. If there is no ram memory in Slot 1, the computer will not work.

How to know what the FSB is of the processor, you have currently installed?
I suggest using the free CPU-Z,

The above link shows the default screen for CPU-Z. The screen that automatically comes up when you open CPU-Z.

There are tabs across the top that you click on, to get other information. (Caches, Mainboard, Memory, SPD, Graphics, About)
More on this in a moment.

Let's look at the Processor example shown.

1) Name: Intel Core i7 860
It is an Intel Core i7 processor, and the model number is 860,

2) Code Name: Lynnfield
Based on the Lynnfield technology, and the 45nm architecture.
(nm stands for NanoMeter. One billionth of a Meter)

3) Package: Socket 1156 LGA
Uses an LGA1156 processor socket,

4) Technology: 45nm (Already stated by looking at the Wikipedia link)

5) Core Voltage: 1.216 V
Looking at the Wikipedia link, you can see this processor's voltage range is 0.65 to 1.4 Volts.
Or stated as 0.650 to 1.400 Volts. It is -> DC Voltage.

The 1.216 Voltage stated, is what that Processor is using now.
It is real time information.

6) Specification: Intel (Registered trademark) Core (TradeMark) i7 CPU.

CPU stands for Central Processing Unit. Another term used is Microprocessor, or simply -> Processor, for short.

8) 860 = Intel Model Number
@2.80GHz stands for 2.80GigaHertz. The MAXIMUM frequency rate that the processor is designed to operate at.

9) Family, Model, Stepping, Ext.Family, Ext.Model, and Revision, are Intel technology factors, for this processor.
What Family of Processors it was developed from, what Model design, what stepping it uses, what Revision of design, and etc.

10) Instruction: The Instruction Sets, or instruction set architecture, it uses.
The basic MMX, and SSE, and variations of the SSE instruction sets, and further development of Instruction Sets through the years.

11) Forget about the Cache column. What you are concerned with is under the Clocks (Core#0) subheading.

I just stated the above, so you might have a better understanding, of what you are looking at.
(Also it may spark something inside you, to join a Research and Development team, and design future computer technology. Who knows, right? )

12) Core Speed:
Again with the 'Speed'. It is Frequency Rate.
This is the maximum 'speed' that the Processor will operate at.
(Maximum frequency rate)

When you have CPU-Z going, you can watch this frequency rate, change. It is showing Real Time information. AS IT HAPPENS.

13) Multiplier: The multiplier times the internal clock 'speed', of the Processor.

Forget about the information shown. It is for an Intel Core i7 processor, and this processor operates on a much different technology, than the Intel processor in your computer.

What you are concerned with is shown in the box, to the right of -
Bus Speed.

A) If you have a Processor with a 533MHz FSB, the number shown will be 133.2
Because Intel processors are 'Quad Pumped'
133.2 times 4 = 532.8
This is rounded up to 533, or 533MHz.

If you have an Intel processor with a Front Side Bus of 800MHz, the number in the box will be 200.6
200MHz (Rounded down)

Processor with an 800MHz FSB? Use PC3200.
(DDR Sdram at 400MHz)

Processor with a 533MHz FSB? Use PC2700.
(DDR Sdram at 333MHz)

For additional questions please post in a Comment.

[ Need to know how to download, install, and use CPU-Z? Post in a Comment.
You can also just post what you see on CPU-Z, and I will tell you what you are looking at.

Clicking on the Caches tab, gives you information on the Processor cache.

Clicking on the Mainboard tab tells you about your Motherboard.

Clicking on the Memory tab, gives you basic information on your Ram Memory.

Clicking on the SPD tab, gives you detailed information about your Ram Memory, AND each ram memory module.

Clicking on the Graphics tab, gives you information on your graphics chipset. Integrated on the motherboard, or on a graphics card.

Clicking on the About tab, gives you information about CPU-Z.
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