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[SOLVED] Upgraded to i7 3770k PC wont post

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October 2, 2012 5:49:42 PM

Hello Everyone,
It looks like im having a RAM issue here.

I am running:
Mobo:GA-Z68X-UD3H-B3 BIOS Ver - F12
CPU: Intel i7 3770k (just upgraded from a i5 2500k
RAM: 2 Kits of KHX1600C9D3K2/8GX to make 16GB - Ram has 1.65v

So i upgraded from the i5 to the i7 last week.
PC wouldnt post, it boots for 3-5 seconds, shuts off then boot loops over and over.
I then upgraded the bios to the F12 version.
Still not posting.

I removed all but 1 stick of ram. PC boots fine.
Installed 2 sticks of ram and pc boots fine.
Install 3 sticks and it wont post.
Install 4 sticks and it wont post.

I have no idea what is wrong.
Any help would be great, im losing my hair on this one!

Thanks

PS- I upgraded the CPU to get better performance for livestreaming @ http://twitch.tv/epictankz

Also i have not set manual memory settings in the BIOS, was not sure if that was a wise thing to change or not ?
October 2, 2012 5:57:26 PM

Sounds like you have bad RAM or bad slots. Have you tried the 3rd and 4th sticks in the other slots?
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October 2, 2012 6:09:06 PM

majestic1805 said:
Sounds like you have bad RAM or bad slots. Have you tried the 3rd and 4th sticks in the other slots?


If i have the i5 installed with all 4 sticks of ram it boots fine.
I have alternated the sticks around with the i7 and it will only boot with 2 installed.
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October 2, 2012 6:26:49 PM

Your not supposed to use 1.65v ram with Sandy Bridge, or Ivy Bridge.

I would set the ram to 1.5v/1333/9-9-9-24 and see what happens. If that doesn't work try 1.6v/1600/9-9-9-27.

Your mobo is probably setting the memory to 1.5v and it won't run at 1600 undervolted.
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October 2, 2012 6:37:33 PM

geekapproved said:
Your not supposed to use 1.65v ram with Sandy Bridge, or Ivy Bridge.

I would set the ram to 1.5v/1333/9-9-9-24 and see what happens. If that doesn't work try 1.6v/1600/9-9-9-27.

Your mobo is probably setting the memory to 1.5v and it won't run at 1600 undervolted.


Thanks im gonna try those settings tonight.
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October 3, 2012 4:32:01 AM

tonight i upgraded to the latest bios UH1.

I tested 1.5v/1333/9-9-9-24 & 1.6v/1600/9-9-9-27 and no change, it will wont post with 4 sticks in.

Also reading the MOBO manual, it states the Dual Channel Memory Configuration is as follows:

Channel A: DDR3_2, DDR3_4
Channel B: DDR_1, DDR3_3

The system will ONLY post with the 2 ram sticks in Channel B: DDR3_1, DDR3_3
Any 2 sticks will work.

If i move them to the Channel A, it will not post.
If i put all 4 sticks in it will not post with the i7 3770k, but it WILL post with the i5 2500k.

Also not sure if its because of the RAM loss, i am now getting very low FPS in games. Compared to when i was running the i5.
Im really lost now, beginning to think buying the i7 was not a good idea!

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October 3, 2012 1:20:39 PM

So with all the issues ive been having and reading in multiple locations that the i7 3770k is not really meant to be used with 1.65v RAM, i think im going to just buy new ram. I need to get this issue resolved. And ive tweaked all the ram volt/timing settings that have been suggested.

Im looking at buying this ram.

http://www.newegg.ca/Product/Product.aspx?Item=N82E1682...

Any negatives?
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October 3, 2012 3:12:52 PM

Well the 2500K is not meant to be used with 1.65v ram either, so I don't see how that's relevant.

I don't understand why you upgraded the cpu to begin with, I mean I don't know what you do with the computer, but going from a 2500K to a 3770K is kinda like going from a 5hp lawnmower to a 5.1hp lawnmower, it just really makes no sense.

And why do you need 16GB of ram anyways??


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