Will 1gb ddr2 800mhz ram support intel102ggc2

If you upreage the RAM to 2Gb by inserting a 2nd 1Gb memory module then the 2nd RAM maybe faulty or incompatible.
If you insert a 2gb memory module to replace the 1Gb memory module then it maybe faulty or incompatible.
Try using the same make and RAM speed as the original RAM module.

To determine if a 1Gb RAM module is faulty insert one RAM module in the motherboard at a time. If the both 1Gb RAM modules work then the RAM modules from different manufacturers are incompatible with each other. Try using RAM modules of the same make and speed.

Did you buy a 2GB ram stick or did you buy 1GB ram X2 so in your laptop you have only 1 stick of ram in there thats 2GB or do you have 2 sticks of ram in there which are 1GB if you have 2 sticks in there means one of them dead and is not registering it on your computer if you have only 1 stick in there thats 2GB but your system only reading it as 1GB then you will need to update your bios as it could be set only to read 1GB

The motherboard is not capable of supporting 1GB RAM....

Is the 1Gb RAM you purchase the same make and speed as the original? If not, they may not be compatible with each other or the new RAM module may be faulty.
Try removing the RAM from slot 1 and insert the new 1Gb RAM module in slot and boot up your laptop to test the new 1GB RAM module.
Installing a single 2Gb RAM module should work.
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The below is the contents of Intel published for your board
Intel Desktop Board D102GGC2 Technical Product Specification
System Memory The board has two 240-pin DIMM sockets and supports the following memory features: • 1.8 V (only) DDR2 SDRAM DIMMs with gold-plated contacts • Unbuffered, single-sided or double-sided DIMMs with the following restriction: Double-sided DIMMS with x16 organization are not supported. • 2 GB maximum total system memory. • Minimum total system memory: 128 MB • Non-ECC DIMMs • Serial Presence Detect • DDR2 533 or DDR2 400 MHz SDRAM DIMM
hope it helps, if so rate the solution

> has 1GB of the RAM stopped working?

Yes, or that 1GB stick of RAM is not "seated" properly into its slot.

Turn the computer off.
Disconnect the AC power cord.
Remove one stick of RAM.
Reconnect the AC power.
Start the computer, and see if reports "zero" RAM or "1GB" of RAM.

Repeat with the other stick of RAM.

> "new hardware detected"

That's a quite-different problem -- changing RAM does _NOT_ cause this message.

Cant find your motherboard on the support page, is the memory your trying to install the same speed?

u can use the 1gb ddr1 ram,if the sound is coming then may there is two problem

1.may be the ram is damage

2.your motherboard is not supporting 333mhz bus support

try to find 400mhz ram instead of 333mhz

the 1gb memory modules need to be low-density ie chips on both sides. the motherboard can only recognise 512mb on each side of the memory module.