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TWIN2X2048-8500C5 @ 400Mhz


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Hi, RamGuy.


I bought my TWIN2X2048-8500C5 back in OCT 2006. After much effort and then some research, I found that my P5W DH Deluxe wasn't able to run the ram at its full DDR2-1066 potential. So, I set everything to Auto SPD settings in the BIOS @ DDR2-800 with my Intel E6400 OC'ed @ 400 FSB (3.2Ghz).


Recently, I read a few reviews from some of my trusted sites. In particular:



I don't know what program they used to access the Enhanced Performance Profile settings for this RAM, but from their review, it shows this RAM should be able to handle 4-4-4-12 @ DDR2-800.


However, the RAM encounters errors when I run the Orthos RAM Stress Test. I will follow this post up with a Memtest86+ running overnight.


Another oddity is from the CPU-Z utility, it shows the model # to be CM2X1024-8500C5 with its Timings Table showing 0-5-5-15 @ 533Mhz (screen cap attached). Strange?


I know the official datasheet for this RAM states the SPD is programmed at JEDEC Standard of 5-5-5-18 @ 800Mhz, but the EPP profile states it should handle faster timings.


Can you clear up my confusion on the exact capabilities for this RAM? I can't help but feel a bit remorseful after shelling out $370 for this pair of RAM that can't seem to perform such lax timings.


Thanks for your help.




PS- I'll post my Memtest86+ results tomorrow.


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After researching the forums for others with the same RAM and same issue, I downloaded and applied the 8500c5fix.


The timings table issue is fixed now, as seen in the attached, but I'm still concerned that these modules can't handle 4-4-4-12 @ DDR2-800.


If I had known about this, I would have spent half the money and bought the ram that's spec'ed specifically for running at 800Mhz.


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I would recommend setting the memory voltage to 2.2 volts which is what they are tested at. We can only guarantee that the memory will run at 5-5-5-15 at 1066MHz, although it is quite possible that at 800MHz you will be able to run the memory at 4-4-4-12.
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