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4 x TWIN2X1024-8000UL vs 2 x TWIN2X4096-6400


PeterV

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Hi Ram Guy.

Please refer my profile for system specs.

 

I have 2 x TWIN2X1024-8000UL (4 x 512MB = 2GB) running quite fine at 800MHz 5-4-4-9 (2.2v), but for running XP x64 and Vista x64 I thought I would upgrade to 4GB.

 

I installed 2 x TWIN2X2048-6400C4DHX (4 x 1024MB = 4GB), and got severe memory errors @ 800MHz with CAS set by SPD and 2.1v (SPD = 4-4-4-12).

After reading some of your FAQs, I then ran it again, but at 533MHz with CAS set by SPD and 2.1v (SPD = 4-4-4-12) - with no RAM errors at all.

 

The RAM passes MEMTEST+86 quite fine, also, so I think the problem is that the memory controller can't handle the 4 x 1GB, but is OK with the 4 x 512MB.

 

I was contemplating putting in 1 x TWIN2X4096-6400C5 (2 x 2GB = 4GB) to get the 4GB and hopefully be able to run this at 800MHz 5-5-5-15 2.1v.

 

Will I be better off, performance wise in XP x64 and Vista x64, with the smaller amount of faster RAM (2 x TWIN2X1024-8000UL = 2GB) @800MHz or with the larger amount of slower RAM (TWIN2X4096-6400C5 = 4GB) @800MHz. I mostly use Office apps, Internet, DVD Rips, Video editing (NLE using Adobe Premier, DV to MPEG2).

Thanks for any advice or opinions.

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If you want RAM GUY to answer you, you need to post this question in the Compatibility Section.

 

I am not RAM GUY but I think I can answer your question.

 

You need to set the DRAM speed from 6400 (800Mhz) to 5300 (667Mhz) and set your Northbridge/MCH voltage up a bit by +.05v to hopefully achieve stability with 4 X 1024. It is achievable. Test with Memtest. Some boards will not work at 667Mhz, but many will.

 

Yes, you would be far better with 2 X 2048 in both DRAM speed and system stability. I agree that 4 X 512 puts far less access and load on the memory controller as opposed to 4 X 1024.

 

I would personally move to 2 X 2048 and by doing so, forestall any possible future issues.

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I would agree with DerekT go with one Twin2x4096-6400C5DHX for best performance.

 

Thanks,

Could you please recommend the optimum timings and settings related to RAM (or others) that you recommend for Twin2x4096-6400C5DHX running with the AW8-MAX and Pentium 940 EE 3.73Mhz?

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