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I Lost My RAM - Need troubleshooting help

Last response: in Motherboards
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November 14, 2010 11:39:28 AM

I needs some major trouble shooting help. I apologize if this is long but I will try to be thorough. Also I am not a computer guru so if you give me advice please be very specific. I know just enough to get into trouble (obviously :sarcastic:  or I wouldn't be having this problem)

New build
MB - Gigabyte X58A-UD3R v2 BIOS version FB
CPU - i7-930
RAM - OCZ PC3 12800 1600 6-8-6 1.65v (OCZ3P1600C6LV6GK) 2GB x 3
Win 7 Home Premium 64 bit
PSU - Corsair HX750
HSF - Corsair H50
60 GB SSD
1 TB HD

The problem is that I have 6 GB of RAM but windows only sees 2GB.

The History is that I built the machine, installed windows, no problems, it recognized 6GB, I started messing around and within about 15 minutes windows could only see 2GB in slot 3 (Gigabyte says triple channel mem goes in slot 1 ,3 and 5 - the white ones). CPU-Z sees 4 GB in slot 1 and 3. All 3 sticks work in slot 3 so I do not believe it is the memory.

I figured it was a bad motherboard. I RMA'ed the board and got a second one.

Installed everything again. Windows saw 6GB of Memory and I thought I was golden. I ran Speedfan 4.41 and got a Windows blue screen and a stop code 0x00000101. when I reboot I had the same problem - only 2 GB of the 6GB is recognized - only slot 3 is being seen by windows and CPU-Z sees 4GB in slot 1 and 3 nothing in slot 5.

I sent an email to Gigabyte support and they suggested disabling XMP. I see in the manual on page 44 how to disable XMP however my BIOS does not have this line in it!!!!!!!!!!! You would think Gigabyte would know what the BIOS looks like for this board.

My BIOS screen where that XMP should be shows:
System Memory Multiplier
Memory Freq
Performance Enhance
DRAM Timing
etc.
(and no line that says Exteme Memory Profile)

I feel that it is a BIOS problem but don't know how to fix it. I really need a good trouble shooter to point me in the right direction.

:cry: 
a c 717 V Motherboard
November 14, 2010 12:26:23 PM

Welcome to Tom's Forums! :) 

I would agree with XMP; NEVER use it --- ever. I am very familiar with the 'UD3R'.

You can 'try' to shutdown and clear CMOS, and ONLY make 1 change set the CPU fan to 100% {H50}.

Next, the clear winner seems to be incompatible DDR3. I did not see the {OCZ3P1600C6LV6GK} listed in either the QVL or OCZ supported memory lists.

Tested RAM OCZ - http://memoryselector.cnetchannel.com/ocztech/result.as...
Certified RAM - http://www.gigabyte.us/products/product-page.aspx?pid=3...

Exchange for {TR3X6G1600C8D} http://www.newegg.com/Product/Product.aspx?Item=N82E168...

OCZ OCZ3P1600C6LV6GK ; start a ticket - http://www.ocztechnology.com/contact/

Also, 'that' MOBO doesn't like SSD + HDD - http://www.tomshardware.com/forum/276715-30-x58a-ud3r-r...
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November 14, 2010 12:55:05 PM

Actually the reason I bought the RAM was that it is on their supported list, from their document on their website it shows this:
O16C1 2GB OCZ OCZ3P1600LV6GK DS
or it looks like it is to me

I will try the shutdown and clear CMOS, and will change CPU Smart Fan to disable to make it run at 100% per the manual, and report back

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a c 717 V Motherboard
November 14, 2010 1:05:34 PM

Interesting, I am looking at the QVL list myself now...

OCZ3P1600C6LV6GK <- what you posted
I do see:
OCZ3P1600LV6GK
OCZ3G1600LV6GK
OCZ3X1600LV6GK
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November 14, 2010 1:10:16 PM

jaquith said:
Interesting, I am looking at the QVL list myself now...

OCZ3P1600C6LV6GK <- what you posted
I do see:
OCZ3P1600LV6GK
OCZ3G1600LV6GK
OCZ3X1600LV6GK


ummmmmmm, wha'ts the difference with the c6 in the middle of the item number?

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November 14, 2010 1:13:34 PM

OK, CMOS and fan change didn't help - still 2 GB of RAM out of 6GB

do you still think it is a RAM issue versus a MB or CPU issue?

what is my next step?
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a c 717 V Motherboard
November 14, 2010 1:22:11 PM

The IC's are totally different. The C6 means CAS 6 timings.
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a c 717 V Motherboard
November 14, 2010 1:26:51 PM

Well, lets look a little more; my assumption is the RAM. And, while 'missing' RAM on the P55 is typically a bent CPU pin the X58 'can' have the same issue - BUT after you exchanging the MOBO - statistically then my vote goes to the RAM.

First check:


Then post the R.M.
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November 14, 2010 2:07:46 PM

I read your link with your issues with the MB and RAID. My computer has no RAID configuration, just 2 hard drives. Do you think that has anything to do with this issue?
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November 14, 2010 2:16:51 PM

Also you recommended the Corsair RAM model TR3X6G1600C8D
The one listed in GB approved list is TR3X3G1600C8D

does that make any difference?
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Best solution

a c 717 V Motherboard
November 14, 2010 2:24:53 PM

Corsair Tested - http://www.corsair.com/configurator/product_results.asp... {TR3X6G1600C8D} top of the list; it's running in the 1 UD3R I kept.

I have to leave for a while, next I will suggest that you Manually set the Memory Multiplier = 12, set all CAS per the OCZ, and DRAM Voltage. AND reseat the RAM; try cleaning RAM contracts with Isopropyl alcohol, insert damp {production oils}, and wait 10 minutes then boot.

Post back! - Good Luck!
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November 17, 2010 9:29:18 PM

OK I Ordered the Corsair Dominator RAM TR3X6G1600C8D
and swapped out the OCZ RAM and got into the BIOS. Rmember how I said there was no XMP lines in the BIOS? Now there are! I swear they were not there when I was using the OCZ RAM. Anyway the XMP is disabled, system mem multiplier is set to 12 per your instructions, the standard timing control is set to auto but seems to have filled in 8-8-8-20 and the sticks are supposed to be 8-8-8-24. My concern is the voltage is showing 1.5 and these are supposed to be 1.65 sticks. Does it matter?
I went to the mother board voltage control page and bumped it up to 1.64 since that was as close as the BIOS would let me get.

Windows is seeing 6GB of RAM now and so is CPU-Z. What I don't get is that CPU-Z is showing 4 columns per stick - JEDEC #1, #2, #3 and then XMP-1600 and it lists the frequencies and stuff and shows the voltage as 1.5 for JEDEC 1, 2, and 3 and 1.65 for the XMP-1600 column. What's all that mean for me?

BIG THANK YOU JAQUITH!

The frankenputer lives!
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a c 717 V Motherboard
November 17, 2010 9:45:53 PM

Your seeing the XMP now because the Corsair's are XMP rated RAM.

Pay attention to the #4 column, and remember 800 = 1600 DDR3 {Double Data Rate}.

Glad to hear you have sanity again! Been there and 'it ain't no joy' - Good Luck! :sol: 
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November 25, 2010 3:08:24 PM

Best answer selected by bonanza2000.
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