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Advice needed on adding DDR2 memory to P35 motherboard

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March 1, 2011 1:55:31 AM

I have a Gigabyte GA P35DQ6 motherboard running with 2 x 2 GB of OCZ Reaper OCZ2RPR800C44GK, which is 800 Mhz, 2.1 V, timings at 4-4-4-15.

I would like to add another 2 2 GB DIMMS to the other pair of memory channels. Unfortunately, it looks like the exact same memory is no longer available. OCZ makes a version which is very similar but is 1.8 V and timings of 5-5-5-18.

Of course there are many other choices for 800 Mhz DDR2 memory available as well, most are cheaper.

The question is, do I need to find memory with the exact same timings and voltage, or can I run something different and still get good results?

Any advice about which memory to upgrade the system is greatly appreciated.
a c 150 } Memory
a c 195 V Motherboard
March 1, 2011 3:03:04 AM

Standard DDR2 800 is timed 5-5-5-15 at 1.8v so your first kit is factory overclocked. If you add the other kit timings will default to the slowest installed modules but you can probably overclock the new stuff to the same tighter timings as your old RAM. If not you will never notice in daily use anyway.
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March 1, 2011 1:45:30 PM

anort3 said:
Standard DDR2 800 is timed 5-5-5-15 at 1.8v so your first kit is factory overclocked. If you add the other kit timings will default to the slowest installed modules but you can probably overclock the new stuff to the same tighter timings as your old RAM. If not you will never notice in daily use anyway.


Any not reason to use this memory for my second pair of DIMMs?

G.SKILL F2-6400CL5D-4GBPQ

1.8-1.9 V, 5-5-5-15 timings. Cheaper.

For $20 more, G Skill also has a 2 x 2 Gb pair at 2.0-2.1 V, this one at 4-4-4-12.

I understand about the timings, but am still confused about the voltage. Is there any problem with running 2 sets of DIMMs with different voltage settings? Would both sets again default to the same, lower number?

Also, I assume the faster, lower latency memory would allow the existing RAM to run at its factory overclocked speeds. How much effect would this have on system performance? (I am running Win7 64 with a Q6600 CPU).

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a c 150 } Memory
a c 195 V Motherboard
March 1, 2011 3:53:09 PM

I would get the 2.1v with the same cas just to make things easy. Why are you needing 8GB on that older platform anyway? You use photo/video editing software? Because for gaming 4GB is still fine.
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March 1, 2011 8:57:28 PM

Yes, my main application is photoediting, and some videoediting and CAD. When I have large files open the memory resource allocation gets over 90% at times and things get really slow.

I will build a new system in about a year, maybe a little less, when the new 2011 socket motherboards and CPUs come out. Until then, I hope more memory will let my system run a little faster when handling large files.
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a c 150 } Memory
a c 195 V Motherboard
March 1, 2011 11:12:37 PM

It should help. The only downside is DDR3 is cheaper than DDR2 now!
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March 2, 2011 12:41:20 AM

OK, the slightly more expensive, 4-4-4-12 2.1 V memory it is.

Thanks for your help!
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March 2, 2011 12:49:46 AM

Best answer selected by drose01.
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a b V Motherboard
February 23, 2012 7:26:51 PM

This topic has been closed by Mousemonkey
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