Memtest results on new RAM?

I recently purchased 8GB of new RAM [1] for my main computer, and saw memtest 4.0 might be a good tool to test the quality of the RAM. I ran the utility for a little over 18 hours, and then manually stopped it. If I'm reading the report right, it said there were approximately 1560832 errors. See screenshot.

This means bad RAM right? Can I tell from the report which slot, or do I need to run the test one by one for each of the 4 DIMMs?

[1] G.SKILL 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 1066 (PC2 8500) Dual Channel Kit Desktop Memory Model F2-8500CL5D-4GBPK - Retail
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Gary CaseConnect With a Mentor RetiredCommented:
There are several possibilities here ... you need to consider all of these and combinations thereof, and do a bit of experimenting to isolate exactly what the cause is in your specific case:

(1)   Installing 4 double-sided modules on an unbuffered board is generally not a good idea -- this can result in far too much electrical loading on the address and data buses.    I suspect your 2GB modules are in fact double-sided modules ... to the loading may be too much for the system to run reliably.   A good test of this is to run with a single pair of modules => if they test good; try the other pair ... if they also test good, then the issue is address loading.

(2)  The modules you're using are designed to run at 2.0-2.1v.    The standard voltage for DDR2 modules is 1.8v.    You need to manually set the higher voltage in the BIOS ... voltage is not an automated SPD parameter.    This MAY allow the system to run with 4 modules -- but whether you use 2 or 4 I'd still set the correct voltage.

(3)  You may simply have a bad module (or modules)

I would do this:

(a)   Install just two modules (in the correct slots for dual channel operation)

(b)   Set the voltage to 2.1v

(c)   Run MemTest and see if they operate reliably.     If not, shut down; remove one module; and run MemTest again.     If so, shut down; remove both modules; and try the same test with the other pair.

(d)  If the modules test good in pairs -- and you want to try using all 4 (not a good idea for rock-solid memory operation in an unbuffered system) -- then try it again with all 4 modules installed (but the higher voltage setting) ==> AND increase the latency settings on the memory to provide more time for the degraded bus signals to stabilize (i.e. if you're running at 5-5-5-15, change it to 6-6-6-18)
lvancottConnect With a Mentor Commented:
The memory appears to be bad.  I'd yank all the memory except one and run the test again.  Make sure the memory is seated properly and there is no dust jammed in the socket.

When installing memory make sure you are grounded.  It only take 100 esd volts to destroy a memory chip.  It takes 3000 esd volts before you feel a static shock.  So, you can complete destroy a chip and not even feel an electric static shock.  

Also; never touch the pins when handling memory.
Thermo-MonkeyConnect With a Mentor Commented:
To answer your question,
"Can I tell from the report which slot, or do I need to run the test one by one for each of the 4 DIMMs?"
No you cannot, it's all trial and error.
Go here for more detailed information 

Remember that in some rare cases the memory slots on the motherboard could be bad too.

When you run MemTest, how long does it take until you start seeing the red errors?
once you see even one error, no need to continue testing, just switch some sticks around and try again.

Good Luck!

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jessc7Author Commented:
I have the voltage set to 2.1v, and have applied the G.SKILL recommended settings for my motherboard (Gigabyte EP45-UD3P 1.6). Here are the results of the tests I ran this evening:
  • Single DIMM in slot 1, no error
  • Single DIMM in slot 2, no errors
  • Single DIMM in slot 3, no errors
  • Single DIMM in slot 4, no errors
  • DIMMs in slots 2 and 4, no errors
  • DIMMs in slots 1 and 3, errors
  • DIMMS in slots 1, 2, 3 and 4, errors
Any thoughts on the results?
atomsheepConnect With a Mentor Commented:
I had a similar problem with a similar Gigabyte motherboard in a recent build. I also noticed that slots 1 and 3 weren't working, and slot 2 and 4 were generating no errors on Memtest. Despite the positive Memtest result for 2 and 4, a fresh Windows 7 installation was still quite unstable. Turns out my RAM (I think it was also G.SKILL) wasn't on the Gigabyte QVL for my motherboard - I bought another kit that was on the QVL, and all problems solved.

The QVL for your motherboard:

In my experience I feel ASUS motherboards are tops when it comes to memory compatibility.
Gary CaseConnect With a Mentor RetiredCommented:
What latency settings are you using?     If you're running at 5-5-5-15, I'd try the test at 6-6-6-18 (still at 2.1v) and see if the slots 1&3 configuration then tests error free.

Also, for the dual slot tests (2&4 and 1&3) are you trying it with different sets of modules?    [You don't need to try all possible combos, but you should try each test with two different pairs of modules]

If your slot 1&3 test fails with relaxed latency settings and with any set of 2 modules - and if all of the same sets of modules pass when run in slots 2&4, then I'd conclude your motherboard has a problem with dual channel operation in those slots.    But be sure to try the reduced latency ... and, if the BIOS provides for it ... at a slower clock rate.    

The BEST test would be to try a pair of less aggressive modules that run at standard voltage [these are excellent: ] ... but you may not have any available.     Might be worth the restock fee to just buy a pair and see if they resolve the problem -- if so, you could RMA the G.Skill modules.
jessc7Author Commented:
I think I read something about slots 1 and 3 on this board as well, but I can't remember right now.
The other weird thing is I have no system instability. If it wasn't for the memtest results, I wouldn't think there were any issues.
jessc7Author Commented:
@garycase: I'll try your test ideas soon. I've had enough for tonight. :)
Gary CaseRetiredCommented:
Since the board uses unbuffered RAM, I wouldn't recommend using more than 2 modules anyway  -- I'd simply install modules in slots 2 & 4 and run with 4GB.

... or, if you really want 8GB, buy 2 4GB modules and put those in slots 2 & 4.
(your motherboard supports 4GB modules)   ==>  something like this:
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