Memory failure issue

[radurock]

First of all, hello, i'm a new user here and i have some problems with memory failure if you guys could help me with, i'd be grateful.

I have a laptop Asus g53sx (ROG) which came originally with 2x4gb ram
From cpu-z, in slot 1 and 3 i have the original ram : Hyundai PC3-10700(667mhz) HMT351S6BFR8C-H9
and in slot 2 and 4 i've installed few months ago (@ november) 2x4gb corsair memories which are these ones : http://www.corsair.com/cmso8gx3m2a1333c9.html

Around one month ago i started getting blue screen with memory management failure, and like a fool i ignored it. After reinstalling windows 7 x64 sp1 i came across the same problems i had plus my utorrent kept downloading corrupt zip volumes (which normally aren't corrupt) all the time. So i started google-ing around and found out that this might be caused by memory failure. And i saw on this forum that i should run memtest86 and prime95.. I ran memtest86 for 9 hours and got lots of errors ( i can't remember which tests gave what number of errors, but it was a full test; after 9 hours it was @250.000errors). Now i've ran Prime 95 for about 2.5-3 hours and got a number of fatal error, hardware failure detected like:
- 9000 lucas-lehmer...length 672k, pass1=448, pass 2=1536...rounding was 0.4921875, expected less than 0.4
and a bunch of other errors on worker 1,2,5 and 8.
Do you guys have any suggestions? Again, i didn't have any problems for quite a while so I don't really know what to do know, if the memory that i put in is getting bad or why, if the original memory got bad etc

Thank you very much

 

[ikachu]

Definitely sounds like you have a bad DIMM in there. Your best bet is to test 1 DIMM at a time (pull all of the other DIMMs except one, run memtest86, if you get any errors the DIMM is bad).

If none of the DIMMs fail memtest86 on their own, then it's possible that the default timings are too aggressive with all DIMM slots populated, so if the BIOS gives you the option you can try to mess with the CAS latency and other settings until you find one that works.

If one or more of the DIMMs fail memtest, you could try making the timings less aggressive as well, but at that point I'd probably just toss the DIMM since I'd never really trust it. I doubt you did anything to hurt the DIMM(s), they were either bad from the beginning and you just started noticing it, or they were marginal and voltage fluctuations or something like that pushed it over the edge into the fail zone. I've noticed with older DIMMs that sometimes they don't like being in Suspend-to-RAM (S3) mode for long periods of time so I guess that could play a role.

 

[tweakboy]

I smell RMA! immediately.

 

[corkyg]

Laptops have SODIMMs, not DIMMs. Have you tried returning to the original memory config?

 

[tweakboy]

Hey Corkyg he failed his memtest86 I would send both back and get a brand new kit.

 

[tweakboy]

Cuz you dont know the other piece of RAM might get corrupt.. So just take out all RAM and buy a 8GB or 16GB kit. viola

 

[radurock]

i've removed the corsair's and now i only have the 2x4gb ones and running a prime95 atm then i'll leave it over the night with memtest...I think the corsair and the original hyundai memory might not be compatible...which is bleah T_T...considering i bought them in november for 24pounds and now the prices for ram more than doubled

edit: the really annoying thing i haven't yet found where is the "hidden" 4th sodimm slot because under the keyboard there is only one and on the back is the other 2...apparently i have to take the whole laptop apart to get to the 4th one...and i don't know how easy that is T_T
edit2: found the specs for original installed sodimm :http://www.memory4less.com/m4l_itemdetail.aspx?itemid=1445703364

 

[bryanl]

The Corsair is likely the problem since it's made from untested chips.

 

[radurock]

i've tested the default sodimms i had and they have no fault

on corsair: should i try to send them back since they have lifetime guarantee? or should i sell them(if they are not bad)and try to get same ram as i have now?