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TWIN2x2048-6400C3DF Issue with asus


Zee33

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Hi there , Newbie here .

 

Here goes I have TWIN2x2048-6400C3DF memory installed on my asus P5W DH Deluxe board and am trying to utilize the full timings of the memory . Now my problem is that the memory voltage is 3.1v and the board only goes as high as 2.4v . The stock timings for the memory are 3-4-3-9-3 but that is at 3.1v .

 

What should my timings be when my voltage is capping out at the 2.4v on the MB ?

 

I also have another question . Recently I bought TWIN2x2048-6400C4D ram thinking that that was what I already Had . The stock timings on it are 4-4-4-12-4 @ 2.1v Is it possible to use this ram with my already installed ram if I configure the already installed ram to the same timings manually ?

 

Your help will greatly be appreciated , Thanks Zee33

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Hi there , Newbie here .

 

Here goes I have TWIN2x2048-6400C3DF memory installed on my asus P5W DH Deluxe board and am trying to utilize the full timings of the memory . Now my problem is that the memory voltage is 3.1v and the board only goes as high as 2.4v . The stock timings for the memory are 3-4-3-9-3 but that is at 3.1v .

 

What should my timings be when my voltage is capping out at the 2.4v on the MB ?

 

I also have another question . Recently I bought TWIN2x2048-6400C4D ram thinking that that was what I already Had . The stock timings on it are 4-4-4-12-4 @ 2.1v Is it possible to use this ram with my already installed ram if I configure the already installed ram to the same timings manually ?

 

Your help will greatly be appreciated , Thanks Zee33

 

Your memory voltage is 2.2v @ (3-4-3-9) for those modules.

 

http://www.legitreviews.com/article/364/1/

 

http://www.corsair.com/corsair/products/specs/TWIN2X2048-6400C3.pdf

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Dominators are a different formfactor but the DRAM is the same.

 

I also have another question . Recently I bought TWIN2x2048-6400C4D ram thinking that that was what I already Had . The stock timings on it are 4-4-4-12-4 @ 2.1v Is it possible to use this ram with my already installed ram if I configure the already installed ram to the same timings manually

 

You will not be likely to run them together. The 6400C3's are Micron D9 ICs, require more voltage and do not play nicely with other ICs. If you want to try, then you would be advised to drop the bandwidth from 800Mhz (6400) to 667Mhz (5300) and the timings to 4-4-4-12 2T with 2.1v as well as an increase of your MCH voltage +.2v.

Download Memtest86+ V2.01 from--->

and extract the ISO image. Burn the ISO image to an CD-ROM disk. Insert a single stick of the 6400C4 modules in the slot closest to the CPU. Enter the BIOS. Set the DRAM speed to 667Mhz and the timings to 4-4-4-12 and a 2T Command Rate. Increase the Northbridge/MCH voltage +.2v and the DRAM voltage to 2.1v. Shut the system down. Remove the 6400C4 and insert a single stick of 6400C3 in the same slot. Restart. If you gain boot, then shut down and insert a second 6400C3 in slot 3. Restart. If you gain boot, shut down, insert a single stick of 6400C4 in slot 2 and restart. If you gain boot, then insert the final stick in slot 4. Restart and run Memtest for two full passes.

 

If this doesn't work, change the order of the DRAM. Same procedure. One stick of 6400C4 in slot 1, then another in slot 3. 6400C3 in slot 2 and finally the last one in slot 4. Restart and run Memtest for two full passes.

 

If this doesn't work, then you are out of luck.

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Ok just to let you know , The Dominator rams TWINX1024 (6300)3C and 4C's are running well but at (5200) with the timings 4-4-4-12-2 @ 2.1v with the MCH upped by .2v . Didn't run the memory test you listed but have run Orthos for 5 1/2 hours with out a failure . I also have the E6600 cpu running at 2.97ghz.

 

Orthos info :

Test 9, 4000 Lucas-Lehmer iterations of M18274369 using 1024K FFT length.

Self-test 1024K passed!

Test 10, 800000 Lucas-Lehmer iterations of M135169 using 8K FFT length.

Self-test 8K passed!

Test 10, 560000 Lucas-Lehmer iterations of M184319 using 10K FFT length.

Self-test 10K passed!

Test 9, 5300 Lucas-Lehmer iterations of M13069345 using 768K FFT length.

Self-test 768K passed!

 

Not sure what all these Orthos numbers mean but am seeing a respective passing rate . Another question I have is , which I think I already know the answer to is , Am I better off with the higher timings of 4-4-4-12-2 with 4g. of memory ? or lower timings of 3-4-3-9-4 with 2g. ?

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Well after running the ram test it turns out that one of my Dominator 6400C3D is bad . So applied for a RMA . The test showed over 500 errors on the one stick all others were ok . Since I got the 2 Dominator 6400C4D rams for $24.00 after rebate from newegg , I am deciding to use them till I get the replacement rams . Then will order the 6400C3D's to match . Thanks for the help though . But for information purposes you can run the 3D and 4D rams together with some work .
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