Overclock.net › Forums › Components › Memory › Noobi need help with memory
New Posts  All Forums:Forum Nav:

Noobi need help with memory

post #1 of 4
Thread Starter 
Hello everybody,

I have recently bought a new computer that i wanted to learn a little how to overclock with... to begin with I really only wanted to OC the CPU however I have just had new memory installed and i think i have a problem.

Yesterday I added 8GB of memory to my machine, making a total of 16GB 4 x KingstonKHX1600C9D3K2 and since then i have had 3 bsod, when the PC wakes from sleep. As my memory frequency was reset to a 13.33x I went back into the bios to change it to 16x... I was worried that maybe the voltages were wrong so I ran cpu-z after to see what was going on and was kinda shocked by the results.

In this image below you can see pics of CPUZ on the CPU tab, the Memory tab and the SPD tab (showing each of the 4 memory slots). My question please is what on earth is going on with SLot3?... i dont understand any of this... frown.gif

Windows is showing 16GB of memory... so i guess its working, but i dont know. Can anyone please, please help, tell me whats going on and how to fix it?

Thank you.

Kart

700
post #2 of 4
Normally it's a bad idea to load your system down with fully populated DIMMs. The odds are that this is a corruption due to under-voltage for a given frequency (stock SPD will need more voltage when run in 4s instead of pairs).

The other alternative is to reduce the memory clock and leave the voltage stock. That's most likely what you have going on there.

You can get away with as much as 1.55V on a Sandy Bridge and I know that some people have pushed them up to 1.60 V on the DIMMs but it's really not healthy.


What I'd like to know, is if you have your page-file disabled, what is your maximum memory use for your system when you it is fulfilling its role?

Do you even need 16 GB?

Your PC will almost certainly run faster (and be more stable) with only 8 GB of RAM installed and unless you are doing some heavy AutoDesk/SolidWorks/Maya/3D Studio, or 400 GB satellite image manipulation, I simply don't see where you will need 16 GB of RAM.

RAM is not one of those things where more is better. RAM is one of those things where it's best if you have just enough that if you heavily load it that you will never use more than 80% of it...
B2
(8 items)
 
  
CPUMotherboardGraphicsGraphics
Intel Core i7-5930K Haswell-E 6-Core 3.5GHz LGA... EVGA X99 Classified (151-HE-E999-KR) LGA 2011-v... EVGA 04G-P4-3975-KR GeForce GTX 970 SSC ACX 2.0... EVGA 04G-P4-3975-KR GeForce GTX 970 SSC ACX 2.0... 
RAMHard DriveCoolingCase
G.SKILL Ripjaws 4 series 16GB (4 x 4GB) 288-Pin... SAMSUNG 850 EVO MZ-75E1T0B/AM 2.5" 1TB SATA III... CORSAIR Hydro Series H100i Extreme Performance ... Phanteks Enthoo Luxe Series PH-ES614L_BK Black ... 
  hide details  
Reply
B2
(8 items)
 
  
CPUMotherboardGraphicsGraphics
Intel Core i7-5930K Haswell-E 6-Core 3.5GHz LGA... EVGA X99 Classified (151-HE-E999-KR) LGA 2011-v... EVGA 04G-P4-3975-KR GeForce GTX 970 SSC ACX 2.0... EVGA 04G-P4-3975-KR GeForce GTX 970 SSC ACX 2.0... 
RAMHard DriveCoolingCase
G.SKILL Ripjaws 4 series 16GB (4 x 4GB) 288-Pin... SAMSUNG 850 EVO MZ-75E1T0B/AM 2.5" 1TB SATA III... CORSAIR Hydro Series H100i Extreme Performance ... Phanteks Enthoo Luxe Series PH-ES614L_BK Black ... 
  hide details  
Reply
post #3 of 4
Thread Starter 
Hey man,

Thank you for the reply. To clear up a couple of point to begin with... pagefile isnt disabled on my system, I moved the pagefile.sys to my D (HDD) drive because my C: drive is an SSD drive and and only 128GB and I was running out of space. I just got a second SSD drive in my computer now, which has become the F: drive. For the moment there should be 16GB of pagefile, just because windows always seems to put the default pagefile to equal whatever the active RAM is. I was thinking of reducing the pagefile to 8GB and running if off the F: drive. I read in another forum somewhere that it was better to put the pagefile onto a drive that wasnt the main drive (C:) normally (i dont know if this is true-I just read it). To answer your other question, the main reason I got the extra 8GB of RAM (appart from the reason the it costs next to nothing now) is that I have just starting using 3dsMax for modeling and mapping. I am also hoping to get mudbox and zbrush soon to start learning that as well... the point is everyone says that for this, the more RAM the better.

I didnt think voltage would be too much of a problem, as i have a pretty good power supply (corsair 850W). And I to be fair to my system.. I ran some load and memory tests after and the slot 3 started reading normally in CPUZ... so Im not sure what these results were for.

But I have to admit I am completely confused about the RAM voltage question. In the bios the voltage is set to 1.5V and the memory frequencey is set to 16x (1600) but it says (in CPUZ and in the kingston info) that at x16 frequencey the voltage should be at 1.65V... so where is the 1.65V "setting" coming from if in the bios it says 1.5V? Maybe I explain this badly but I am confused.

I guess my last qusetion is this - is it possible for me to easily create different profiles for my PC? I mean can I literally turn off 2 of the RAM slots so that when I am not using 3dsMax and such I can only function on 8GB.

Its true that I havent had any problems since yesterday - so maybe it was just some weird glitch - but I really would like to try to understand the volatge vs. frequencey thing and determine the setting I should be using in the bios.

You said I could probably put it up to 1.55V with no problem... if i do this could it make things more stable?

Thank you for taking the time to reply.
post #4 of 4
You're welcome.

The reason for the confusion about DIMM voltages on Sandy Bridge is that Sandy Bridge and most Rev 3.0 motherboards prefer 1.500V DIMM. There are 1.65V DDR3 DIMM but they're not preferred for the new Sandy Bridgemotherboards. So the RAM manufacturer may say "1.65V" and the motherboard manufacturer may say "1.5V".

Some people are running 1.65V DIMMs on their 1.5V motherboards without issues. Other people will tell you that it's a horrible idea and that you can cause problems with your system by doing so. If the DIMM that you bought are 1.65V DIMM and you are only putting 1.5V to them and they're working error-free, then you're fine. If they require 1.65V to work without errors then you're in the "not recommended" area. Again, some users don't mind that and others do. I think that's a call only you can make for yourself. (I personally would make sure that I bought 1.50V DIMM and stick to what the motherboard manufacturers recommend.)

That being said, when you fully populate the DIMM slots on your motherboard, you may need to increase your voltage slightly above what the DIMM are rated at from their manufacturer in order to make them stable. (So that's where things get really dicey, if you're using 1.65V DIMM and they need 1.66V to get stable because of how many you have, but your motherboard recommends only 1.50V you're pushing the limits even harder here.)

The issue of a fully populated set of DIMM slots on your motherboard is completely independent from the issue of 1.50V vs 1.65V DIMM.

I hope that makes a bit more sense now.

Moving along, it sounds like with 3DS Max and Mudbox and Zbrush that you may indeed have a need for 16GB of RAM and may even have a need for a page file beyond that.

Page file size is not something I would let Windows allocate dynamically allocate in most situations because this leads to fragmentation issues and a fragmented page file sucks on a standard HDD. What I would do, is run a clean-sweep of my drive (CCleaner is great) and disable the page file. Then I restart my PC and I defragment my HDD. (I like Defraggler, from the same company that makes CCleaner.) Once I have my HDD completely defragged (NOT on SSD, I'm talking traditional HDD here) then I will enable a page file and make the maximum and minimum size identical, not allowing Windows to determine the size. Doing this forces the page file to be contiguous and prevents it from ever becoming fragmented and this improves performance dramatically.

Again, I do not know enough about SSD to know whether or not its best to have a page file on a SSD or on a HDD. Ask the SSD experts here about that. smile.gif A page file on a SSD would certainly perform better than on a HDD but I suspect that a page file on a SSD may wear it out quickly due to the many read/write operations inherent with a page file.

As far as what size to make the page file, if I need one, what I do is monitor my RAM use with the page file disabled and run the most memory intensive programs that I have and see what sort of memory warnings come up. (Most programs will tell you how much more they need.) I like to make my system have about 80% of the memory used in a maximum memory load scenario, which allows ample reserves for regular operations like opening and closing windows, saving files, etc.

If you encounter an issue where Windows is running out of memory you can always increase the size of your page file. Note that if you've written more to your HDD that you'll likely cause your page file to become fragmented, so it's a good idea to go back and disable the page file, reboot, sweep the system clean, defragment completely, then set the new pagefile size and verify that it's contiguous.

The pagefile fragmentation issues are one reason that many people recommend that you have your page file somewhere other than the C partition. Another reason folks recommend having it on other drives is that file access is typically faster at the beginning of the disk, so if you have two physical HDD and your OS is on hda then you can put your page file on a clean fdb and it will be not only contiguous, but also at the very beginning of the disk which makes it perform ever so slightly better than if it were at the end of the disk. (The larger the platter size of disk is, the more marked that performance difference will be.)

If you have only one physical HDD with multiple partitions (primary or logical) then ideally, the page file should be at the beginning of the disk. Note that when I say "beginning" of the disk, that means beginning from what the OS sees and it's actually the outer edges of the disk where the angular velocity is highest. The inner areas of the disk are the "end" of the disk and the file performance is slowest there. Since you are using SSD and if you are going to use your HDD as a page file then It would definitely be best to have the HDD formatted into two partitions and have the "first" partition be dedicated to the page file and nothing else. (You can then allow Windows to dynamically allocate page file with the confidence that it will never become fragmented if you do not use it for any other purpose and do not store other files there.)

Unfortunately, I do not know of a way to create profiles that will disable the DIMM slots on your motherboard from within the OS. Physically placing a DIMM into the slot will cause it to draw electrical power and affect the RAM timings and voltage / current draw.

However, as I mentioned above, if you use a dedicated HDD (or partition) for your page file, you can allow Windows to dynamically manage your page file. You may never even use the page file with 16 GB of RAM, even with the 3DS Max. Then again, if you're running large numbers of polygons and using xrefs (external references) you might be using huge amounts of RAM and need far more than the 16 GB your system has. Often, 3DS Max recommends that you have a page file 2x the size of your physical RAM amount.

Fortunately, Windows is fairly good about trying to use physical RAM before it uses virtual RAM so if you are using 16 GB of RAM and a large page file, Windows shouldn't slow you down in gaming, for example.
B2
(8 items)
 
  
CPUMotherboardGraphicsGraphics
Intel Core i7-5930K Haswell-E 6-Core 3.5GHz LGA... EVGA X99 Classified (151-HE-E999-KR) LGA 2011-v... EVGA 04G-P4-3975-KR GeForce GTX 970 SSC ACX 2.0... EVGA 04G-P4-3975-KR GeForce GTX 970 SSC ACX 2.0... 
RAMHard DriveCoolingCase
G.SKILL Ripjaws 4 series 16GB (4 x 4GB) 288-Pin... SAMSUNG 850 EVO MZ-75E1T0B/AM 2.5" 1TB SATA III... CORSAIR Hydro Series H100i Extreme Performance ... Phanteks Enthoo Luxe Series PH-ES614L_BK Black ... 
  hide details  
Reply
B2
(8 items)
 
  
CPUMotherboardGraphicsGraphics
Intel Core i7-5930K Haswell-E 6-Core 3.5GHz LGA... EVGA X99 Classified (151-HE-E999-KR) LGA 2011-v... EVGA 04G-P4-3975-KR GeForce GTX 970 SSC ACX 2.0... EVGA 04G-P4-3975-KR GeForce GTX 970 SSC ACX 2.0... 
RAMHard DriveCoolingCase
G.SKILL Ripjaws 4 series 16GB (4 x 4GB) 288-Pin... SAMSUNG 850 EVO MZ-75E1T0B/AM 2.5" 1TB SATA III... CORSAIR Hydro Series H100i Extreme Performance ... Phanteks Enthoo Luxe Series PH-ES614L_BK Black ... 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Memory
Overclock.net › Forums › Components › Memory › Noobi need help with memory