TWINX1024-4400C25 not reaching stated SPD ratings

[NINaudio]

I recently purchased this ram based on the at review of it, since it was used in a very similar setup to mine.

I was having trouble getting my ballistix ram to work at it's stated spd settings in dual channel mode, even when underclocked, so I returned it and bought the corsair in it's place.

The ram is rated at 2.5-4-4-8 at ddr550. I can't get it to run 2.5 at anything over ddr520. I can get it to run at ddr550 with 3-3-3-10 timings. 2.5 always fails memtest though, even with voltage increased to 2.85. Any ideas or suggestions would be greatly appreciated.....

 

[Sentential]

Originally posted by: NINaudio
I recently purchased this ram based on the at review of it, since it was used in a very similar setup to mine.

I was having trouble getting my ballistix ram to work at it's stated spd settings in dual channel mode, even when underclocked, so I returned it and bought the corsair in it's place.

The ram is rated at 2.5-4-4-8 at ddr550. I can't get it to run 2.5 at anything over ddr520. I can get it to run at ddr550 with 3-3-3-10 timings. 2.5 always fails memtest though, even with voltage increased to 2.85. Any ideas or suggestions would be greatly appreciated.....

Whats your LDT set to?

 

[NINaudio]

ldt: x3
httx 275

 

[PClark99]

I am running the same ram in my shuttle SB75G2 at its rated speed of 275 2.5-4-4-8 at 2.7V.

I think your chip is holding you back. try dropping the multiplier on the processor.

 

[NINaudio]

hmmm... the intrigue deepens. I can run memtest at both ddr490 and ddr544 with no errors. I run prime95 at 245 x 10 with no errors. But, if I run prime95 at 272 x 9 (2448), I get an error after about 4-6 minutes. I dropped my LDT to x2, but it didn't make a difference in Prime95 testing.....

 

[NINaudio]

ok, ran through the whole isolation technique, except for the ram. max cpu seems to be 2480. max fsb is 280. I tried running 275 x7 with the ram at full speed in prime 95, got an error. dropped the ram to a 2:1 divider and it passed fine. Now I guess I'm going to see what I can get with the ram at 275x7 in prime 95. I figure this will take out the fsb and the processor from the equation and allow me to focus on the ram itself.... am I right in thinking that?

 

[ssvegeta1010]

Yes, and if the RAM will not run at 2.5-4-4-8 at DDR550, then you should give Corsair a call and see about an RMA.
Just make sure that you have isolated the RAM to the best of your ability, which I think you are doing a very good job of. An RMA should only be used when necessary.

 

[NINaudio]

I'm out of ideas. I've tried everything I can think of and it won't run at 2.5-44-8 at ddr550. I can't even run ddr490 at 2.5-4-4-8 without errors in Prime 95.....

 

[PClark99]

the more I think about it.

I did try my corsairxms44002.5 in my K8N Neo2 Platinum. At the time I did have problems running it above 250 FSB.

Personally it sounds more to me like a memory controller issue than a RAM issue.

Did you run 275 fsb 1:1 in that board with other RAM?

As a corollary to that if that Winchester is CBBID I would put money on it being the processor.

 

[arnosmith]

I have the same problem, I used to have just one chip though, and a week ago, I bought another one. But if I run them at the same time, I get all the syptoms and problems you describe, even though I can run each of the RAM chips on ddr 600 with 2,5-3-3-5 timings, I can't run them together at anything over ddr500

I can't complain though, as both of my RAM chips works fine alone. And that is how I bought them. I'm hoping they perfom better on my buddys mobo, so that he can take them off my hands...

 

[NINaudio]

I've run 272 @ 1:1 before with a single stick of ballistix, but it wouldn't run anything in dualchannel mode without errors in memtest unless I put it to 2t command rate. THat's why I got rid of that.....

 

[NINaudio]

Well....seems as though I can get up to 272 with this ram as well in single channel mode using one stick. What does that mean if I can't run dual channel without errors and having it be rather unstable? Is it the cpu then?

 

[McArra]

It looks like the memory controller to me. What is the Stepping of that CPU? It may help, if it is a CBBID it's almost sure a problem of the CPU.

 

[NINaudio]

Honestly I don't know. I assume I'd have to take the water block off to find out, right? Looks like I'll have to check that tonight when I get home. At first I thought it was the ballistix ram, but now that it's happenning with the corsair as well, it makes me wonder.

 

[PClark99]

without a doubt its the CPU.

 

[NINaudio]

oh well, looks like I'm gonna replace it and see if anyone who doesn't plan on any large oc's wants to buy it. I can run 272 x 9 with one stick of ram, so I guess that's what I'm gonna do until the venice cores come out, then I'll pick me up one of them.

I even tried one more time with dual channle at 235 x 10, only ran prime for 20 and would freeze up and stutter in 3dm05....got a score of 3600, took one stick out and reran the test: smooth and anything and got 5700 3dmarks....

 

[arnosmith]

I don't think it's my CPU, I mean, I can underclock it to 1500MHz and still not be stable at standard ratings...

 

[Leper Messiah]

its the CPU controller. Makes me sad that I have a CBBID also, but my KVR can't do anything near that....

 

[NINaudio]

I'm also not stable at standard ratings no matter where I put my cpu at. And I've tried with a pair of ballistix sticks and a pair of corsair sticks. Even went as far as placing an 80mm fan to blow cool air right at the sticks in case they were getting too hot....no luck.

Are all the CBBID's problematic when running dual channel? If I were to replace it with one from 0505, you think it'd do any better? I sorta want to get it all working now, but I'm also thinking I'll just run with single channel for now, buy a venice in a month or two, and then run it in dual channel (and hope it's not the mobo!).

 

[PClark99]

I have a CBBID 3200 that ran just fine at 250x10 with the memory at 1:1 in my MSI K8N Neo2 Platinum.

I won't run 250 fsb with the memory 1:1 in my K8N Neo4 SLI though.

 

[NINaudio]

hmmm....so would you think it's the board or the chip then?

 

[NINaudio]

well, have some progress here. Got a new bios from MSI 1.62, and now I can run dual channel at 261 x 9 and am primestable for a whole 46 minutes!!!! lol it is I guesss a step in the right direction. I'm going to go play some more though and see what I can do, might just break down and use a divider now that the dual channel seems to be working better. It ran 3dM05 perfectly, passed memtest, everything except Prime.....

 

its not your ram i just joined your forum to tell you its all the Neo2 platform of the board, there is actual a fix for it , you have to change the setting to change in the
boot.ini area . i tell ya exactly next

 

[exar333]

BTW, "NINaudio" great name!

anyway, try giving it a tad more voltage....what are your running at right now? 2.8 or whereabouts? feed it .1 or .2 more, see if that helps (just watch the temps, if it feels more than just comfortably warm, thats too much, or active cooling will be needed)

 

[NINaudio]

Actually I dropped the voltage and it became more stable. I had read of a few cases where TCCD functioned better with lower voltages, so I gave it a shot. It works now. Damn art aspect of OC'ing.....lol