4G ddr3 works while 8G DDR3 not work on Gigabyte GA-P35C-DS3R

[gepolv]

Hi, all,

My board is : Gigabyte GA-P35C-DS3R. (I know it is sort of old).

Recently, I bought "G.SKILL Ripjaws Series 8GB (2 x 4GB) 240-Pin DDR3 1333MHz DIMM PC3-10666 Desktop Memory Model F3-10666CL9D-8GBRL" and put them to DDR3 slots. Then I boot it up without any problem except that the booting becomes fairly slow. When I log into my win7 (64-bit), the CPU usage is always 100% and the whole system is just frozen there.

However, when I removed one 4G, everything works great. Then I put this back and removed the other one 4G, everything still works great. Now I am so confused.

I know this motherboard only supports 4G DDR3 from motherboard spec. But trust me, a lot of people has successfully installed 8G without any problem. That is because when this motherboard was manufactured, there is no DDR3 more than 2G.

Would some one please help?

Thanks.

Some motherboard spec:
--------------------------------------------------------------------------------
CPU

Supports Intel® Core™2 Extreme Quad-Core / Core™2 Duo / Intel® Pentium® Extreme/ Intel® Pentium® D processors
Supports1333/1066/800 MHz FSB

Chipset

Northbridge: Intel® P35 Express Chipset
Southbridge: Intel® ICH9R
Gigabit Lan Controller
8 Channels ALC889A Audio controller

Memory DDR3:

2 x 1.5V DDR3 DIMM sockets supporting up to 4 GB of system memory
Dual channel memory architecture
Support for DDR3 1333*/1066/800 MHz memory modules

DDR2:

4 x 1.8V DDR2 DIMM sockets supporting up to 8 GB of system memory
Dual channel memory architecture
Support for DDR2 1066*/800/667 MHz memory modules
--------------------------------------------------------------------------------

 

[rolli59]

From your post above;
"
2 x 1.5V DDR3 DIMM sockets supporting up to 4 GB of system memory
Dual channel memory architecture
Support for DDR3 1333*/1066/800 MHz memory modules "
Explains your problem to me! That is the 4GB bit!!!!!!

 

[gepolv]

I know this motherboard only supports 4G DDR3 from motherboard spec. But a lot of people have successfully installed 8G (2X4G) without any problem. I believe that is because when this motherboard was manufactured, there is no DDR3 more than 2G.

From your post above;
"
2 x 1.5V DDR3 DIMM sockets supporting up to 4 GB of system memory
Dual channel memory architecture
Support for DDR3 1333*/1066/800 MHz memory modules "
Explains your problem to me! That is the 4GB bit!!!!!!

 

[1tym]

try updating the bios to the most recent

 

[RetiredChief]

See: http://www.tomshardware.com/forum/285697-30-ep35-ds3r-accidentally-ordered-ddr3

From Specs (For Rev 2 MB)
DDR3: 0.2 x 1.5V DDR3 DIMM sockets supporting up to 4 GB of system memory
0.Dual channel memory architecture
0.Support for DDR3 1333*/1066/800 MHz memory modules
DDR2: 0.4 x 1.8V DDR2 DIMM sockets supporting up to 8 GB of system memory
0.Dual channel memory architecture
0.Support for DDR2 1066*/800/667 MHz memory modules

Based on that While you may get it to work, the MB does not officially support 8 gigs of DDR3. Erratic operation may occur

 

[gepolv]

Best answer selected by gepolv.

 

[gepolv]

After updating BIOS to the latest version, everything works like a charm. Thanks, 1tym.