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Mimatched RAM

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March 17, 2010 11:50:08 AM

Hello everybody,
I've bought a GEIL dual channel 1066 (2x2GB) 6-6-6-18 (2.0 v) and I want to match it with OCZ dual channel 1066 (2x1GB) 5-5-5-15 (2.1 v). Which Memory Timing and Multiplier should I choose to match them?
you know, my system restarts when I use them together!

Also, My system recognize the GEIL as a 800 Mhz 5-5-5-15! What should I do?

More about : mimatched ram

a b } Memory
March 17, 2010 1:26:52 PM

Try first 800Mhz CL5,5,5,15 @2.0V
If it works, you can try 1066Mhz CL6,6,6,18 @2.0V

Anyway, you can use the "cpu-z" which says you the default timings for each speed (533,667,800,1066) and for each module.
a c 163 } Memory
March 17, 2010 6:53:15 PM

Hi newcomer and welcome to the Tom's hardware forum.

What mobo do you have?
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March 18, 2010 3:40:56 AM

Dear All,
M.B : GA EP45-UD3R
FSB : 333
March 18, 2010 3:57:14 AM

Henry Chinaski said:
Try first 800Mhz CL5,5,5,15 @2.0V
If it works, you can try 1066Mhz CL6,6,6,18 @2.0V

Anyway, you can use the "cpu-z" which says you the default timings for each speed (533,667,800,1066) and for each module.


I've tried 800Mhz CL5,5,5,15 and 1066Mhz CL6,6,6,18 @ 1.8V, you think 2.0V would differ the result?
a c 163 } Memory
March 18, 2010 4:16:30 AM

Ok, your mobo support 1066, so, you need set all the specifications manually in the BIOS. configure the RAM at 2.0V and the timings at the low CL.
March 18, 2010 5:41:50 AM

saint19 said:
Ok, your mobo support 1066, so, you need set all the specifications manually in the BIOS. configure the RAM at 2.0V and the timings at the low CL.


GEIL didn't work at 1066, CL 5-5-5-15, 2V
so, I must use 1066, CL 6-6-6-18, 2V or 1.8V.
The RAMs didn't Work together!http://img.tomshardware.com/forum/uk/icones/smilies/fou...
Will be any differences if I set DRAM @2.0V instead of @1.8V?
a b } Memory
March 18, 2010 7:36:03 AM

Yes, you have set them @2.0v (although sometimes a bit lower voltage is enough, but 1.8v is too low)
a b } Memory
March 18, 2010 7:43:51 AM

Your Ocz modules need 2.1v (specification), so at least set 2.0v, and if it doesn´t work, try 2.05v (0.05v more than specification is not a problem for the Geil modules)
March 18, 2010 10:52:49 AM

Henry Chinaski said:
Your Ocz modules need 2.1v (specification), so at least set 2.0v, and if it doesn´t work, try 2.05v (0.05v more than specification is not a problem for the Geil modules)

Thanks Henry, But didn't work!
Maybe there is a problem in GEIL module (GX24GB8500C6UDC) because it is automatically recognized as PC2 6400 (CL 5-5-5-15) in cpuz and Timing Table doesn't have 6-6-6-18 @ 533 Mhz!
a c 163 } Memory
March 18, 2010 1:25:39 PM

Please give me the links for your GEIL RAM and OCZ RAM, like I see the problem is your GEIL RAM that don't support the OC until 1066 with the default settings of your OCZ RAM.

Also, the voltage of the OCZ RAM could be a problem, the recommended for DDR2 is 1.8V, and you have a DDR2 with 2.0V to 2.1V that could be hard to set for your mobo.
March 18, 2010 11:49:06 PM

saint19 said:
Please give me the links for your GEIL RAM and OCZ RAM, like I see the problem is your GEIL RAM that don't support the OC until 1066 with the default settings of your OCZ RAM.

Also, the voltage of the OCZ RAM could be a problem, the recommended for DDR2 is 1.8V, and you have a DDR2 with 2.0V to 2.1V that could be hard to set for your mobo.


Thanks saint19,

OCZ:

GEIL:
a c 163 } Memory
March 19, 2010 4:04:52 AM

Trywith 6-6-6-18 and 2.0V for both RAMs
March 19, 2010 11:48:02 AM

saint19 said:
Trywith 6-6-6-18 and 2.0V for both RAMs


Thanks saint19,
But didn't work!
a c 163 } Memory
March 19, 2010 12:31:39 PM

Well, in that case is a conpatibility problem between you GEIL and OCZ RAM.
March 19, 2010 1:43:52 PM

saint19 said:
Well, in that case is a conpatibility problem between you GEIL and OCZ RAM.

:cry: 
!