Jump to content


 


Register a free account to unlock additional features at BleepingComputer.com
Welcome to BleepingComputer, a free community where people like yourself come together to discuss and learn how to use their computers. Using the site is easy and fun. As a guest, you can browse and view the various discussions in the forums, but can not create a new topic or reply to an existing one unless you are logged in. Other benefits of registering an account are subscribing to topics and forums, creating a blog, and having no ads shown anywhere on the site.


Click here to Register a free account now! or read our Welcome Guide to learn how to use this site.

Photo

Due to a mistake, I am using 6 GB RAM and not 8, am I STILL okay???


  • Please log in to reply
4 replies to this topic

#1 montecarlo1987

montecarlo1987

  • Members
  • 29 posts
  • OFFLINE
  •  
  • Gender:Male
  • Location:NY State
  • Local time:10:55 PM

Posted 17 May 2011 - 02:29 PM

Hello. I need your honest opinion. This is very interesting and COULD BE detrimental to my computer regarding RAM...

For a couple of years now since I built my own ASUS P5Q system, I have been using a total of 4GB of RAM (Corsair XMS2 4GB 2x2GB modules; TWIN2X4096-6400C5) since I was using Windows XP 32-bit at the time. As you know, that is the max. amount of RAM that XP can use for 32-bit (Technically, just over 3 GB.). Several months ago, I upgraded to Windows 7 Professional with 64-bit. Since then, I even purchased more memory, exactly the same type and design I am currently using. The only difference is that the new twin RAM kit is labeled version 6.1 and my original twin RAM kit is labeled version 3.1. Both new and original RAM kits ahve the same 1.80 V ratings labeled on each module. I know my ASUS P5Q can handle up to a max. of 16 GB, so I figured I would take it to 8 GB having 2 sets of 2 kits of the TWIN2X4096-6400C5 modules. So I installed them. For the few months I had 8GB of RAM, the system ran fairly okay most of the time (say 95% good) except for playing longer online videos (like from YouTube) where the system would BSOD and/or the system would freeze during playback (later in the playback). Other than that it ran great. The system seemed more perky than 4 GB! I never modified the BIOS and left everything on "Auto" configuration (like timings and voltages) even after installing the added 4 GB of RAM. However, I never had this random freezing and BSOD happen before since I installed the additional RAM. It always ran great with only 4GB. I have been putting up with this issue for months. Then I decided to get to the bottom of it. I ran Prime95 Torture Test and other software tests to see what the issue was. The system froze exactly 6 minutes into the Prime95 test each time. I decided to take out the added 4 GB of RAM (left with 4 GB) and ran Prime95 and the tests ran smoothly. I played longer online videos with only 4GB of RAM. The videos played smoothly too.

One of things I did is that I looked into ASUS User Guide and RE-CHECKED the QVL (Qualified Vendors Lists) for compatible RAM. I realized I misread the module type in the QVL list before I purchased the same RAM kit thinking just adding another 4 GB to my system would be fine since I know my motherboard can handle up to 16 GB. According to the QVL list, for my type of modules I ALREADY HAD, I CAN NOT add anymore modules. For DIMM socket support per QVL list, these modules do NOT support FOUR modules inserted into both the yellow and black slots as two pairs of dual-channel memory configuration. *ONE* RAM kit only supports *ONE* pair (TWO modules) dual-channel memory configuration per QVL list. WELL, THAT MIGHT EXPLAIN THE ISSUES!!!

Well. I cannot get a refund now and I am stuck with the modules. I wanted and needed more memory too. At 4 GB of RAM, running Prime95 uses ALL the 4 GB of RAM. Also, I do video editing and needed a little more RAM anyways. So I got curious! What if I just install ONE of the TWO modules in the RAM kit (or only add 2 GB) to the already installed 4 GB of RAM for a total of 6 GB of RAM? I would have more RAM (greater than 4 GB)! Would that be okay? BUT WOULD MY SYSTEM BE STABLE??? I knew that my system was "fairly" stable at 8 GB most of the time. Lowering to 6 GB, but more than 4GB MIGHT be a good choice.

I added ONE 2 GB RAM module to the second DIMM slot between the other pair. I ran Prime95 at 6 GB of RAM since Prime95 always seemed to catch issues. RESULT: NO ISSUES!!! Prime 95 ran smoothly. I notice that using 6 GB of RAM, I was left with at least 50% free unused RAM even using labor intensive Prime95. I figure I should be fine for video editing now. I have ran several long You Tube videos for testing purposes. NO SYSTEM FREEZES EITHER!!! I figure my system is stable at 6 GB of RAM FOR A SHORT TIME NOW. My system seems more perky now than with just 4 GB of RAM. I did not make any modifications to my BIOS either.

What is your honest overall opinion of this scenario??? Do you think I am okay or not with 6 GB of RAM???

Please reply!


Thank you!

Some basic general stats of my system:
- Windows 7 Pro 64-Bit.
- Intel Core 2 Quad Q9550 -- Yorkfield 2.83 GHz 1333 MHz processor.
- ASUS P5Q desktop motherboard.
- 6 GB of Corsair XMS2 3x2 GB DDR2 RAM.
- XFX Radeon HD5670 GDDR5 1GB RAM Graphics Card.

BC AdBot (Login to Remove)

 


#2 dpunisher

dpunisher

  • BC Advisor
  • 2,234 posts
  • OFFLINE
  •  
  • Gender:Male
  • Location:South TX
  • Local time:09:55 PM

Posted 17 May 2011 - 03:03 PM

General musings:

Memory isn't always guaranteed to run with all the slots occupied (just ask anyone with an X58 board) (Just read above again, and you figured that out). It is very likely you will have to boost the voltage a tad to get everything stable. Try 1.9V first, then 2.0V as that is generally the "safe" range for DDR2. Some DDR2 is specced up to 2.2V. It might be very well possible to run 1.85V and have a completely stable system. If boosting the voltage a tad doesn't fix it, swap out the RAM one stick at a time till you find the weak link.

It goes without saying, verify your memory timings before you start to diagnose anything(should be 5-5-5-18 or looser).

Good luck with it sir.

I am a retired Ford tech. Next to Fords, any computer is a piece of cake. (The cake, its not a lie)

3770K @4.5, Corsair H100, GTX780, 16gig Samsung, Obsidian 700 (yes there is a 700)


#3 montecarlo1987

montecarlo1987
  • Topic Starter

  • Members
  • 29 posts
  • OFFLINE
  •  
  • Gender:Male
  • Location:NY State
  • Local time:10:55 PM

Posted 20 May 2011 - 11:19 PM

It goes without saying, verify your memory timings before you start to diagnose anything(should be 5-5-5-18 or looser).

Good luck with it sir.


Hello. Sorry for the late response. Thanks for your reply. May I ask what you would recommend for the timings? The recommended timings are indeed those (5-5-5-18). What would be "looser" than that you suggest?

Please reply.

Thank you!

#4 dpunisher

dpunisher

  • BC Advisor
  • 2,234 posts
  • OFFLINE
  •  
  • Gender:Male
  • Location:South TX
  • Local time:09:55 PM

Posted 21 May 2011 - 03:16 AM

I would not change my timings at this point. If they are running at 5-5-5-18, then that is what they are specced for. Sometimes you can back off the timings to something like 6-6-6-18, or 6-6-6-20 and see if that helps. I usually go the voltage route first as I don't like to sacrifice speed if I don't have to. Try 1.9V first at your current timings and see if that fixes the problem.

I am a retired Ford tech. Next to Fords, any computer is a piece of cake. (The cake, its not a lie)

3770K @4.5, Corsair H100, GTX780, 16gig Samsung, Obsidian 700 (yes there is a 700)


#5 montecarlo1987

montecarlo1987
  • Topic Starter

  • Members
  • 29 posts
  • OFFLINE
  •  
  • Gender:Male
  • Location:NY State
  • Local time:10:55 PM

Posted 21 May 2011 - 02:07 PM

@ dpunisher:

Thanks for your advice! :)

I want to mention this...

First, let me throw out a tidbit and be MORE SPECIFIC (I'm sorry I should of been more specific to begin with. Maybe it will make a difference?!?) about the memory I HAVE and the similar Corsair RAM that is recommend for all 4 slots or 8 GB:

A. What I am using (I HAVE) that is NOT recommended for ALL 4 slots in my mobo, only max. to 2 slots:
Corsair XMS2 4 GB 2 x 2 GB Modules DDR2 TWIN2X4096-6400C5

B. What is recommended to use with my mobo for ALL 4 slots for 8 GB:
Please see the attached QVL RAM Mobo chart for your help. [SOURCE: ASUS P5Q Motherboard User Guide E3790]
Take note of the 4 Corsair modules in the chart. The two sets of kits I have I have is highlighted in yellow. Like I said in my initial post, I misread the QVL chart before I purchased the second RAM kit and realized the mistake no too long ago.

Also...
*let me add some information to the charts so you can interpret A, B, and C for "DIMM Socket Support" mean:

A = Supports one module inserted into either slot as a single-channel memory configuration.

B = Supports one pair of modules inserted into either the yellow slots or the black slots as one pair of dual-channel memory configuration.

C = Supports four modules inserted into both the yellow and black slots as two pairs of dual-channel memory configuration.

My highlighted memory is missing the "C" potential. That is what I am trying to do. I already have "B". I mean... ...and the real question is this... ...CAN I STILL TRY TO GET IT WORK FOR ALL 4 SLOTS (BOTH KITS) IF IT IS NOT RECOMMENDED OR CAN'T I?!?!? Key words are: not *recommended*???


Please reply.

I hope this helps you.

Attached Files






0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users