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Overclock drop after adding additional 4 GB of RAM

post #1 of 5
Thread Starter 
Hi guys, a couple weeks ago, I purchased G.Skill Sniper 2x4 GB RAM modules, upgrading my system from 4 GB to 8 GB. However, I noticed that I can't overclock as high as I could with the 4 GB. With 4 GB, I could get 4.0-4.2 gHZ easily, adjusting depending on the environment that the computer was in. However, with 8 GB, I can't overclock more than 3.3 gHZ. 3.4 gHZ would give me a memory management BSOD, and 3.6 gHZ would give me a watchdog error.

Being unable to overclock high enough would not be a problem if it wasn't for the weird sporadic FPS drops I've been having in games, specifically BF3 and Skyrim. In other words, frame rates would be stable at around 60 FPS, and then, suddenly, FPS would drop to maybe 15-20 FPS before jumping up again to 60 FPS. And this would continue several times when I was playing the game. I'm thinking that this has to do with the low overclocks, but I'm not really sure. I was led to believe that the memory problem/low overclock was the root cause because before, with 4 GB and a high overclock, I never had this kind of problem.

Thoughts on what I should do? Is this problem of mine an actual memory problem, or could the problem be other factors as well (i.e. processor and/or GPU)?
post #2 of 5
When you either have high capacity RAM, have multiple sticks of RAM or have RAM running at very high frequency it puts extra load on the Memory Controller which in your case is on the CPU. This will in turn affect how well you can overclock. Try looking through the advanced section voltage in BIOS and up the voltage for the IMC. Terms might be different but google is your friend.

As for why your getting drops in FPS I can't say for sure but it could be your drop in OC'.
Aigo
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Aigo
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core i7 920 C0 Oc @ 4GHz 1.32 Load Voltage Gigabyte EX58-Extreme GTX 285 SLi + 9800GT Physx 6GB Tri Channel Kingston @ 1200MHZ 
Hard DriveOptical DriveMonitorPower
5*1TB Hitachi + Raid 0 32GB A-Data SSD Samsung DVD-RW Hanns.G 28" 1980x1200 Great Wall 800 Watt Power Supply 
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Silverstone FT-02 
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post #3 of 5
Thread Starter 
Quote:
Originally Posted by Enthusiast View Post

When you either have high capacity RAM, have multiple sticks of RAM or have RAM running at very high frequency it puts extra load on the Memory Controller which in your case is on the CPU. This will in turn affect how well you can overclock. Try looking through the advanced section voltage in BIOS and up the voltage for the IMC. Terms might be different but google is your friend.
As for why your getting drops in FPS I can't say for sure but it could be your drop in OC'.

Thanks. I realized that adding additional RAM would put a load on the CPU, but I did not think it would have been this drastic of a drop.

I am running MemTest on each stick to ensure that it's not an actual problem with the memory.
post #4 of 5
Thread Starter 
Update: It looks like both RAM sticks are fine. The two sticks passed 7 passes of MemTest with no errors.

I'm still having the problems though. I've tried uninstalling and installing new drivers to no avail. Could it really be my downclock? I'm starting to think that my GPU is bottle-necking my CPU now.
post #5 of 5
Quote:
Originally Posted by Admiral Mudkipz View Post

Update: It looks like both RAM sticks are fine. The two sticks passed 7 passes of MemTest with no errors.
I'm still having the problems though. I've tried uninstalling and installing new drivers to no avail. Could it really be my downclock? I'm starting to think that my GPU is bottle-necking my CPU now.

Simple test to tell you. Plug in your old RAM but keep the same downclocked speeds on your CPU and run your game. If you experience what your describing then you have your answer. If you don't then it is either an incompatibility issue of a sort that I can't explain or your new RAM really does put that much extra load on the IMC to slow other things down which is unlikely.
Aigo
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core i7 920 C0 Oc @ 4GHz 1.32 Load Voltage Gigabyte EX58-Extreme GTX 285 SLi + 9800GT Physx 6GB Tri Channel Kingston @ 1200MHZ 
Hard DriveOptical DriveMonitorPower
5*1TB Hitachi + Raid 0 32GB A-Data SSD Samsung DVD-RW Hanns.G 28" 1980x1200 Great Wall 800 Watt Power Supply 
Case
Silverstone FT-02 
  hide details  
Reply
Aigo
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core i7 920 C0 Oc @ 4GHz 1.32 Load Voltage Gigabyte EX58-Extreme GTX 285 SLi + 9800GT Physx 6GB Tri Channel Kingston @ 1200MHZ 
Hard DriveOptical DriveMonitorPower
5*1TB Hitachi + Raid 0 32GB A-Data SSD Samsung DVD-RW Hanns.G 28" 1980x1200 Great Wall 800 Watt Power Supply 
Case
Silverstone FT-02 
  hide details  
Reply
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