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BSOD after edding 4GB RAM

Dson

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Hi everyone. Hope you doing good. I need some help concerning name of my topic. Thank you for your feedback.

So, some background history: I've been running MSI P43 Neo3-F v1.0 with DIMM1: Samsung M3 78T5663RZ3-CF7 2 ГБ DDR2-800 DDR2 SDRAM (6-6-6-18 @ 400 МГц) (5-5-5-15 @ 333 МГц) (4-4-4-12 @ 266 МГц) and DIMM3: the same (there is some space between dimm2 and dimm3).

Today I decided to upgrade my 4 GB RAM to 8 GB RAM. I bought 2 x Samsung M378T2953EZ3-CE6 1310 (2GB 2Rx8 PC2-6400U-666-12-E3).

After installing them into free slots (dimm 2 and dimm 4), checked Task Manager - it said "8 gb" had been availiabele. I thought it's ok. But in about 20 Mins I had BSOD.
After rebooting I had bsod again. MemTest found some troubles and asked to look FAQ #2 but nothing usefull overthere.

I tried to change slots - in some ways, pc didn't load, in some ways memtest showed errors which said smth like this "missing part" or "cant copy from xxxx to xxx". It sowed them in about first 5-10secs of testing.

Though when I ran my PC just with these NEW RAMs, MemTest showed no mistakes and everything was fine.

Thanks for your attention. Hope there is a solution.

Looking forward to getting feedback. Any help is greatly apprechiated.
 
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Have you tried just putting the new pair of ram and see if it runs alright without bsod? This is just to make sure you don't have any dead ram. One thing I learn about ram are the pins not getting good contact with the motherboard slot can cause errors in memtest and bsod. You can try cleaning the motherboard slot pins and make sure the ram sit well.

Also have you try to manual set the timings and the speed of the rams? It would help a lot not having to rely on motherboard auto setting which may not do well for non similar rams.
 

Aquinus

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Memory timings might be conflicting. The "slower" memory might have tighter timings. SPD might be grossly inadequite. I would manually set timings based on the loosest of the two for any given timing.

For example, if one DIMM is 5-6-5-15 and the other is 4-5-6-16, you would want to do 5-6-6-16. I suspect the BIOS is having trouble finding the loosest stable timings as either SPDs don't really match. So get your timings with both memory, get the loosest (biggest numbers of each,) and manually put them in. That *should* get you stable if it's a timing problem. Make sure you're checking timings at the same frequency as well (667Mhz.)

Side note: You want to take the loosest timings of all the DIMMs in your machine. It's only as good as the slowest stick of memory you have with respect to frequency and timings.
 

Dson

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AID 64 Gives all 4 RAMS the same timing: (6-6-6-18 @ 400 Mhz) (5-5-5-15 @ 333 Mhz) (4-4-4-12 @ 266 Mhz)
 

Dson

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Memory timings might be conflicting. The "slower" memory might have tighter timings. SPD might be grossly inadequite. I would manually set timings based on the loosest of the two for any given timing.

For example, if one DIMM is 5-6-5-15 and the other is 4-5-6-16, you would want to do 5-6-6-16. I suspect the BIOS is having trouble finding the loosest stable timings as either SPDs don't really match. So get your timings with both memory, get the loosest (biggest numbers of each,) and manually put them in. That *should* get you stable if it's a timing problem. Make sure you're checking timings at the same frequency as well (667Mhz.)

Side note: You want to take the loosest timings of all the DIMMs in your machine. It's only as good as the slowest stick of memory you have with respect to frequency and timings.
Or AID64 lies?
 

Aquinus

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AID 64 Gives all 4 RAMS the same timing: (6-6-6-18 @ 400 Mhz) (5-5-5-15 @ 333 Mhz) (4-4-4-12 @ 266 Mhz)
It's reading one one of the SPDs then because the memory you got is clearly 667Mhz memory based on a serial number. Which DIMMs are where and can you look up the SPDs instead of the current timings? CPU-Z and AIDA both should give you access to SPD data.

I would see if putting the new DIMMS in slots 1 and 3 instead of 2 and 4 would make a difference. It may be just grabbing the first SPD it comes across (DIMM 0.)

Screenshots of the current memory speed and SPDs would be very helpful.
 
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Dson

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It's reading one one of the SPDs then because the memory you got is clearly 667Mhz memory based on a serial number. Which DIMMs are where and can you look up the SPDs instead of the current timings? CPU-Z and AIDA both should give you access to SPD data.

I would see if putting the new DIMMS in slots 1 and 3 instead of 2 and 4 would make a difference. It may be just grabbing the first SPD it comes across (DIMM 0.)

Screenshots of the current memory speed and SPDs would be very helpful.
Im sorry mate, Im sorry. I put 1st RAM in 1st and 4th DIMM. It worked. I put 2nd in 1st and 4th DIMM and it failed. I think it's just dead.
 

Aquinus

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Im sorry mate, Im sorry. I put 1st RAM in 1st and 4th DIMM. It worked. I put 2nd in 1st and 4th DIMM and it failed. I think it's just dead.
There you have it. That's pretty hard to ignore.
 
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AID 64 Gives all 4 RAMS the same timing: (6-6-6-18 @ 400 Mhz) (5-5-5-15 @ 333 Mhz) (4-4-4-12 @ 266 Mhz)
You're reading the SPD numbers. U can't have 3 sticks of ram each with independent speed and clock latencies on a dual channel board.......
 

Aquinus

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You're reading the SPD numbers. U can't have 3 sticks of ram each with independent speed and clock latencies on a dual channel board.......
Sometimes you can, it's a toss up. You usually have to give up some performance to make the frequency and latencies lax enough to get them to play nicely. Occasionally you run into issues with memory wanting different voltages or having timings so far different that no common latencies will ever make it stable. You're right though, you really shouldn't but, you can and there is no certainty what the result will be which is why it's best to avoid doing it whenever possible. I just wanted to clarify that there are plenty of instances where it both works and doesn't work but, it sounds like the OP has a bad DIMM judging from the last post.
Im sorry mate, Im sorry. I put 1st RAM in 1st and 4th DIMM. It worked. I put 2nd in 1st and 4th DIMM and it failed. I think it's just dead.
 
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Sometimes you can, it's a toss up. You usually have to give up some performance to make the frequency and latencies lax enough to get them to play nicely. Occasionally you run into issues with memory wanting different voltages or having timings so far different that no common latencies will ever make it stable. You're right though, you really shouldn't but, you can and there is no certainty what the result will be which is why it's best to avoid doing it whenever possible. I just wanted to clarify that there are plenty of instances where it both works and doesn't work but, it sounds like the OP has a bad DIMM judging from the last post.
That's not what I meant.
The OP said the 3 installed sticks are all running at different speeds and timings, which isn't possible with a dual channel controller. At least 2 have to be the same.
The motherboard will automatically use the slowest SPD on all dimms.

Anyway OP here's some Intel stuff that may help....good luck. :)

http://www.intel.com/support/motherboards/desktop/sb/CS-011965.htm#single
 
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