Added 8GB RAM to current computer, but windows/programs are slower to respond

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blueflamedazn

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Mar 30, 2006
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Hi, I built a computer 5 years ago with a M4A785TD-M EVO mobo and 2x2GB of GSKILLs RAM:
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Couple days ago I decided to add 8GB more membory and installed these guys:
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

The machine runs on Windows 7 Professrional 64bit, POSTed, and recognized 12 GB of RAM. I checked in CPUz and it also appeared to recognize it.

However, disappointedly and surprisingly after this install, whenever I'd click on a program to open or hit my keyboard, the programs respond really slow to open, close, etc. Even Firefox has slowed down to open and close at least 10 times. Windows also takes so much longer to start up once I log in.

I did some preliminary homework and correct me if I'm wrong, but does it have something to do with the RAM latency and frequency? The slower pair that I have installed are "slowing down" the faster pair?

Short of returning the new pair that I bought, is there any way I can resolve this such that the computer responds much faster?

Slots 1 and 2 have the 2GB modules and this is what the CPUz looks like:
https://drive.google.com/open?id=0B-rt0rbo21DpdnpNOUxWelh2WTQ&authuser=0

Slots 3 and 4 have the 4GB modules and this is what the CPUz looks like:
https://drive.google.com/open?id=0B-rt0rbo21DpeDlRbkJVZ2hwbVk&authuser=0

I did try and open up my BIOS to see what options I can change, but this is where I was into uncharted territory.

Question1:
Should my DRAM Timing Mode be set to DCT 0 or DCT 1 or both?

Question 2:
What should I leave as Auto and what should I change manually? When I first opened up the screen, Memory Clock Mode was Auto, DRAM Timing Mode was Auto, and Memory OverVoltage was Auto.

Question 2A
This is what the BIOS screens looks like of the possible parameters I can chage:
https://drive.google.com/open?id=0B-rt0rbo21DpSFZXX1p0Z1dLUUU&authuser=0
https://drive.google.com/open?id=0B-rt0rbo21DpS1JINUVqRUkwSWs&authuser=0
https://drive.google.com/open?id=0B-rt0rbo21DpakZubjN5aUhoNTQ&authuser=0

I'm unsure based on my 4 sticks that I have, what the DCTs I should have enabled (I'm guessing both? and what the TCL, TRCD, TRP, etc I should manually enter in and which ones I should leave as auto?

I tried the following: TCL 9, TRCD 10, TRP 9, tRTP auto, and TRAS 28 for both DCTs, with overvoltage set at 1.5V, and Memclock value at 667mHZ and is seems to improve a little, but still slower than before I installed the 2 4GB sticks. Could you guys please help confirm that I'm not using the wrong settings?

Please ignore the screenshot in the BIOS numbers as when I took the pictures, I was messing around with the values, these are not the values I have now, I've defaulted them all back to AUTO, afraid I would fry my RAM or something.

Thanks all in advance. I've tried to do a little research, so hopefully what I'm saying makes sense.


*UPDATE*
This is what I found from the mobo manual:
https://drive.google.com/open?id=0B-rt0rbo21DpNXR0dWxDT3RVM2c&authuser=0
https://drive.google.com/open?id=0B-rt0rbo21DpUUJrLWxTQzNMNDQ&authuser=0

With my 2x2GB setup I had my sticks in the A2 and B2 positions (next to each other). When I added my new sticks they are stuck in A1 and B1.
Do you think that my 2GB modules should be A2 and A1, and my new 4GB modules be in B2 and B1?

Then default my settings back to auto and see if I can get away w/o having to tweak the RAM manually?
 
Last edited:
'Do you think that my 2GB modules should be A2 and A1, and my new 4GB modules be in B2 and B1?'

That's what you want, try that and report back.
 
troisanh said:
'Do you think that my 2GB modules should be A2 and A1, and my new 4GB modules be in B2 and B1?'

That's what you want, try that and report back.
Click to expand...

OK so I ended up putting my new 4GB sticks in A1,B1 slots (1st and 3rd slot away from the CPU) and my old 2GB sticks in the A2,B2 slots, defaulted my BIOS settings to auto and it booted up like a dream. now it's back to its old self again, and in fact the extra 8GB def helped to even speed things up.

I guess when I first built it 5 years ago, I never really thought anything about having the 2GBs in A1,B1 since it booted and all this time I've been using them w/o any issues. But I guess when I installed the new 4GB modules, it does make it difference having the old sticks on one channel and the new one on another channel. In retrospect I read about this when I first built my computer, but didn't really think anything of it when I had it set up the way I did b/c it wasn't broke and there was no point fixing it.

Anyway it's night and day now running CoD Advanced Warfare, before with 4GB maps would barely load and stutter like crazy. Now smoother than a baby's butt.

Thanks guys for all your suggestions and help, you can close this thread now. Hopefully my troubles will help some poor soul if they make the same mistake I did.
 
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