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After adding 8GB of RAM (to make 16GB) experiencing significant FPS drops

post #1 of 13
Thread Starter 
I have put 2 additional sticks of Samsung 16GB RAM from my main computer to my family member's computer, after swapping to 16GB myself. He now has 4 sticks of identical Samsung 30nm RAM.

His computer was running fine with 8GB until this morning, when I added my sticks. I know all 4 work well, as I have tested them with MemTest, Prime95, etc., made sure to try them at stock settings and such too.

Problem is that in some games, all of a sudden FPS drops to 10 or lower in some areas, which never happened before. The games I have noticed it in so far were WoW and Guild Wars 2. It does not happen everywhere, but in main cities, FPS can go down to 10-15 in WoW, where it used to be 40-50fps+. It still does go to 150fps depending on perspective and location (even in the same rooms), but the dips in FPS are very noticeable. Flying to another zone at 9-10fps is irritating.

I have been helping him troubleshoot this issue, but have so far come up with nothing. At first I thought it was an issue limited to WoW, but then I went through a bunch of other games installed on that computer, and Guild Wars 2 has that problem as well: 8-12fps where it used to be 50fps+.

Any ideas on how I can effectively troubleshoot what happened? I tried going back to 8GB of RAM, but the issue seems to be stuck now, so back up to 16GB at the moment. It's at basic 1600MHz 9-9-9-26-2T at 1.5V now, which is a very safe range for the Samsung sticks (I normally ran them at 2000-2133MHz at low voltage until this).

Other details: WoW is installed on an SSD, but GW2 is not - so it's not a drive issue. But I do have my disk cache in RAM, not on the SSD.
Edited by ElevenEleven - 11/25/12 at 6:21pm
   
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post #2 of 13
Thread Starter 
Well, it was kind of a nightmarish experience, but I had to go back to the original 2 sticks of RAM. This motherboard (a Gigabyte Z68) just does not like playing with 4 sticks of RAM, even if they are the same kind... Multiple CMOS resets (which meant taking out the graphics card to get to the CMOS battery it blocked), multiple combinations of sticks, all kinds of bad errors and boot failures... Never a Gigabyte board again, that's all I'm gonna say =/ It's always a bit of a black box with the two Gigabyte motherboards I've owned so far.

Back to a working state for now, and my two extra RAM sticks will just have to collect some dust in storage.
   
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post #3 of 13
Did you try manually setting your timings / speeds? Or did you just set XMP and run it?

Owned quit a few Gigabyte boards and never had a single issue, maybe it's the IMC on the chip? Try using the 8GB in different slots to rule out it being the motherboard.
 
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post #4 of 13
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No XMP - that RAM's not even compatible with XMP. I did everything manually and also ran at complete stock values, as mentioned above.

Also tried different DIMMs in different slots, as mentioned above.
   
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post #5 of 13
Quote:
Originally Posted by ElevenEleven View Post

No XMP - that RAM's not even compatible with XMP. I did everything manually and also ran at complete stock values, as mentioned above.
Also tried different DIMMs in different slots, as mentioned above.

Not sure I would blame gigabyte.
My money is on the IMC getting freaked out.
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post #6 of 13
Quote:
Originally Posted by PhilWrir View Post

Not sure I would blame gigabyte.
My money is on the IMC getting freaked out.

Yeah, that's what I was thinking too. He can also try updating the BIOs as well to see if that helps, even if they're at the latest you could always try a reflash.
 
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post #7 of 13
Thread Starter 
Hrm, ok. So basically 8GB is okay, but 16GB is too much? I know the RAM is good, because all 4 sticks have been extensively in use for a long time... Just something about putting all 4 onto the same motherboard, even without any overclocking whatsoever.

I did update the BIOS a while ago, and it's been running fine.

As for Gigabyte, I'm blaming it more for the way their BIOS and POST work in general. Vs. some other motherboards I've tried, it's less straightforward to troubleshoot, less stable with overclocks, and gives problems with RAM sticks in certain slots. It's been the case with 2 motherboards so far--an AMD socket AM3 and this Z68. As an example, I can easily run this Samsung RAM at significantly higher clocks at low voltage on ASRock Z77 Extreme4 and Z77 ITX (both with an Ivy bridge processor and my old Sandy i7), but on the Gigabyte board, I can't go above 1866MHz for these sticks. I have many more examples. Could well just be generally unlucky with a small sample of 2 boards, but the BIOS and how it is executed are still annoying.
   
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post #8 of 13
Quote:
Originally Posted by ElevenEleven View Post

Hrm, ok. So basically 8GB is okay, but 16GB is too much? I know the RAM is good, because all 4 sticks have been extensively in use for a long time... Just something about putting all 4 onto the same motherboard, even without any overclocking whatsoever.
I did update the BIOS a while ago, and it's been running fine.
As for Gigabyte, I'm blaming it more for the way their BIOS and POST work in general. Vs. some other motherboards I've tried, it's less straightforward to troubleshoot, less stable with overclocks, and gives problems with RAM sticks in certain slots. It's been the case with 2 motherboards so far--an AMD socket AM3 and this Z68. As an example, I can easily run this Samsung RAM at significantly higher clocks at low voltage on ASRock Z77 Extreme4 and Z77 ITX (both with an Ivy bridge processor and my old Sandy i7), but on the Gigabyte board, I can't go above 1866MHz for these sticks. I have many more examples. Could well just be generally unlucky with a small sample of 2 boards, but the BIOS and how it is executed are still annoying.

Well, Z68 wasn't really a good thing for Gigabyte. But then again it was. I held a 2500K / 2600K both at 5Ghz, and at about 5.3 for benching for over 7 months. I had the Z68XP-UD3P board.

I'm still leaning towards the IMC on that chip, assuming we're talking about the second rig in your sig. Maybe try swapping out the CPU's and rule out the IMC on that chip. But either way, good luck and let us know how it goes!
 
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post #9 of 13
With 16GB RAM and utilizing all available slots you sometimes need to up voltages to the IMC or the DIMM slots or both..........

For me, I can run 8GB of this on an AMD X6 with (CPU-NB) 1.2v all day ..... but to do it with 16GB I need 1.3v.

Check your voltages.

(Same exact Samsung RAM btw)
    
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post #10 of 13
Thread Starter 
Quote:
Originally Posted by GanjaSMK View Post

With 16GB RAM and utilizing all available slots you sometimes need to up voltages to the IMC or the DIMM slots or both..........
For me, I can run 8GB of this on an AMD X6 with (CPU-NB) 1.2v all day ..... but to do it with 16GB I need 1.3v.
Check your voltages.
(Same exact Samsung RAM btw)

Yeah, this RAM can run at 2133MHz 11-11-11-31-1T at 1.45V and 2000MHz 9-10-10-28-1T at 1.475V (on another motherboard), 1866MHz 9-9-9-24-1T at 1.45V on all motherboards... so it should most definitely be able to run at stock 1600MHz 11-11-11-31-1T at 1.5V with 4 sticks.
Quote:
Originally Posted by Dustin1 View Post

Well, Z68 wasn't really a good thing for Gigabyte. But then again it was. I held a 2500K / 2600K both at 5Ghz, and at about 5.3 for benching for over 7 months. I had the Z68XP-UD3P board.
I'm still leaning towards the IMC on that chip, assuming we're talking about the second rig in your sig. Maybe try swapping out the CPU's and rule out the IMC on that chip. But either way, good luck and let us know how it goes!

Thank you. To be honest, I have spent too much time today troubleshooting this issue and its consequences, and I'm not inspired to try more hardware swaps at this point, given how easily things can get out of hand. I always forget the "if it ain't broke, don't fix it" motto, but this might be a good case to exercise it.
Edited by ElevenEleven - 11/25/12 at 8:59pm
   
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CPUMotherboardGraphicsRAM
i7 3770 @ 4.3 GHz ASRock Z77E-ITX GTX 660 Ti + Accelero Mono Plus, 1.875V G.Skill Ripjaws X 16GB at 2133MHz 9-10-11-28-1T... 
Hard DriveHard DriveHard DriveCooling
Crucial m4 Hitachi TravelStar 2.5" SATA III Intel 330  BitFenix Recon fan controller 
CoolingCoolingCoolingCooling
Corsair H100i Scythe Gentle Typhoon AP-14 x 4 (radiator front... Phanteks 140mm fan (exhaust) Fractal Design R2 Silent 140mm fan (bottom intake) 
OSOSOSMonitor
Windows 7 Professional 64-bit Windows 8 Professional 64-bit (trying it out) Linux Mint Achieva ShiMian 27" IPSB (tempered glass) 
MonitorKeyboardPowerCase
Dell U2412M 24" LZ-GH aluminum/steel TKL keyboard Seasonic G-550 80+ Gold Fractal Design Define R4 
MouseMouse PadOtherOther
Logitech MX518 Monoprice dual-surface aluminum IKEA Dioder light-changing LED strip on the roof Monoprice 10 x 6.25" drawing tablet 
CPUMotherboardGraphicsRAM
Intel i5 2400 3.8GHz turbo boost Gigabyte z68x-ud3h-b3 Sapphire Dual-X 7970 OC Samsung 30nm ULP  
Hard DriveOptical DriveCoolingCooling
Corsair Force 3 LG DVD-RW Zalman CNPS9900MAX-B Noctua NF-S12B ULN 
CoolingCoolingCoolingOS
Scythe Gentle Typhoon AP-14 Fractal Design R2 Silent 140mm fan Bitfenix Spectre 200mm fan Windows 7 Professional 64-bit 
MonitorKeyboardPowerCase
Achieva ShiMian 27" IPSB (tempered glass) Ducky Shine II MX Clears Corsair AX750 BitFenix Survivor in White 
MouseMouse PadOtherOther
Logitech MX518 Ikea circle! NZXT Hue Lamptron FC-9 
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