TWIN2X2048-8500C5 @ 400Mhz

[Sidian]

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:

http://www.xbitlabs.com/articles/memory/print/ddr2-1000.html

 

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.

 

-Sid

 

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

[Sidian]

Well, the RAM, set to 4-4-4-12 @ DDR2-800, 2.0v passed a full Memtest86+ test cycle without errors.

 

However, when I run Orthos to stress test the RAM, it fails. Please see attached.

 

What do you think?

[Sidian]

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.

[RAM GUY]

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.