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Does both pairs of ddr2 memory have to be the same brand in 4 slots???

Last response: in Memory
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October 7, 2009 10:57:17 PM

have pair of DDR2 memory already installed but want to install another pair of DDR2 memory of the same specs but of a different brand because of clearance issues with my current memory size and my cpu fan. 2 slots are of 1 color and 2 slots are of another color. my asrock a780gxe/128m motherboard manual says "this motherboard also allows you to install four ddr2 dimms for dual channel configuration, and please install identical ddr2 dimms in all four slots"
October 7, 2009 11:14:44 PM

They may be different as, but try to match the speed.
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October 8, 2009 8:02:24 PM

I currently have the "OCZ Reaper HPC 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 1066", and want to add the "OCZ Platinum 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 1066 (PC2 8500)". THe specs look identical only difference I see is the reaper's voltage is 2.1-2.2v and the platinum is just 2.2v wich I can just set them to match in the bios?? Heres a link to newegg with a side by side spec comparison........



http://www.newegg.com/Product/Productcompare.aspx?Submi...
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a b } Memory
a c 156 V Motherboard
October 8, 2009 9:11:49 PM

The four DIMM's should be identical for best performance. Otherwise, you may need to relax the memory timing and/or boost the memory voltage a little. In fact, with 4 identical modules, you may need to boost the voltage .1 or .2 volts anyway.
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October 8, 2009 9:23:04 PM

jsc said:
The four DIMM's should be identical for best performance. Otherwise, you may need to relax the memory timing and/or boost the memory voltage a little. In fact, with 4 identical modules, you may need to boost the voltage .1 or .2 volts anyway.


so will the ocz platinum work good with the ocz reaper?? same specs, brand, everything but the way the heatsinks are designed.
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a b } Memory
a b V Motherboard
October 9, 2009 12:43:10 AM

I think you'll be fine. Manually set the DRAM voltage to 2.2V and test it. If it shows as 1066 and running as dual channel, you're in good shape. If it shows as 800, try voltage to 2.3. If that doesn't do it, manually set it to 1066 speed.

You may later want to play around with the latency timings to see if you can get all 4 running a little faster, but it's up to you.
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October 9, 2009 2:50:06 PM

thanks for the info!!!!
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