Memtest how many passes

Active 1 year, 2 months ago. Viewed k times. What if it is a motherboard or CPU issue? How do I know without getting a new motherboard? System Specifications: Memory: 2. Improve this question. TFM 4, 2 2 gold badges 29 29 silver badges 37 37 bronze badges. Question Overflow Question Overflow 1, 3 3 gold badges 12 12 silver badges 24 24 bronze badges. You've probably gotten this figured out by now, but next time take a look at the kernel log on Linux after it hangs. That will give you an idea of what is going on.

CarComp: Please post the failed memtest results. Add a comment. Active Oldest Votes. Testing can not prove the absence of bugs, only their presence Memtest is great for finding errors in RAM. The longer it takes to find the issue, the more subtle it is and the less likely it is the cause a problem with your PC but you should still get new ram if you get even one error As the your computer is crashing quite frequently and you have run a few passes, It's probably not your RAM.

Improve this answer. David David 8, 2 2 gold badges 22 22 silver badges 38 38 bronze badges. I suggest to try to clean the RAMs and socket and test them again first use isopropyl alcohol; made positive experience with disinfection spray as replacement; But don't spray the latter one directly onto RAM - only onto the cloth as it shall only serve as resolvant and will eventually leave some residues when used in too high amounts — SDwarfs.

So if somebody get at least one error - he'd throw his RAM out, go and buy a new one? Are you sure? Tarasovych: It depends on how important system stability is to you. Overclocking can also cause these errors, but that doesn't mean you should throw out your ram, just reduce overclocking or increase dram voltage in safe range.

This is wrong. Show 1 more comment. Jeff Jeff 1 1 silver badge 2 2 bronze badges. To test for heat related errors, run one instance of memtest per CPU core. Select your performance profile under power management. For laptops, do not place them onto cooling stands. Let memtest run for 24 hours. If no errors, you dont have issues with the ram. I actually saw errors starting at pass 3. PS: I suggest at least 3 passes. I've seen errors surface on a third pass, I believe due to heat. Same memory for 30 min was "ok".

The largest number of passes I have found was in this test: Test 7 [Moving inversions, 32 bit pattern] This is a variation of the moving inversions algorithm that shifts the data pattern left one bit for each successive address.

My opinion My opinion as regarding the number of passes is that one should run as many passes as one has the time to wait. Your answer conveys insights that go beyond the others.

My testing stopped after 1pass, is there a setting for increasing number of passes? Are you sure that Memtest86 tests RAM slots?

Joined Apr 27, Messages 0. Anything more than that is - I believe - just a waste of time. Joined Nov 19, Messages 14, I recommend an entire weekend or at minimum overnight. At work I have seen systems where the first error took 72 hours and several hundred passes to occur. Joined Jul 31, Messages Whenever I buy used memory from ebay I usually run 2 complete passes, and just 1 pass if it's new memory that I opened.

It also depends on the system, I work on alot of old hardware for friends and myself and a complete pass on a or early Pentium can take up to a day to run, and make one appreciate just how fast current hardware really is. Joined Mar 31, Messages 1. I have 2 questions with regards to this thread. Joined Jan 15, Messages 1, Hornet said:. From my experience, whenever I suspect a RAM being bad, one complete test is enough to yield errors. So if if your RAM could complete a couple of passes, that usually means there's no any physical defects to it as in bad cells that will always create errors regardless of its speed.

As for stability at the rated speed, you should ensure the RAM is running at its rated speed before you begin the test.

So far, for all the RAM that I've ever encountered, as long as its not physically defective, they should all be able to run at its rated speed regardless of its age. The number of passes for RAM stability testing is very subjective, as you can see in this thread here, different people have different opinion on it. Though personally I feel that testing the RAM's stability at its rated speed shouldn't require any rigorous testing as they were already determined by the manufacturer to run at its rated speed.

Its only when you're overclocking that you're venturing into an unknown territory and you might want to run the test for many hours. Joined Jul 18, Messages 1, Overnight with each module in each slot, by itself and in combination with other modules, in at least two different types of motherboards and with at least two different diagnostics.

I've had to wait as long as hours for an error to pop up. Any other ways to test this memory without spending hours doing so?

Just to say i have 4 sticks of this 2 run in my main pc with no problem but the 2 i am testing wont. Is there anyway to show a matched pair of memory sticks like on the stickers of the memory once they have been mixed up? Last edited: 6 Dec There are other ways to test ram stability via windows occt, prime 95 etc but memtest is the best way for ram Just installed cpu-z i wonder if serial numbers would follow each other as they come off the production line to show a matched pair.

Hard to say Errors should show up in the first pass, 4 or 5 passes will give you an excellent confidence level. For a better experience, please enable JavaScript in your browser before proceeding. You are using an out of date browser. It may not display this or other websites correctly.

You should upgrade or use an alternative browser. Thread starter skellattarr Start date Sep 25, Joined Jul 22, Messages 1, 0. I have a crosshair vi hero and corsair vengeance RGB mhz ram and a Ryzen x CPU I used Ryzen dram calculator to set my ram at mhz it ran well in windows but when I ran memtest86 it popped up with 9 errors in test 7 so I lowered the ram speed to mhz and it did a full one pass with no errors.

Solaris17 Dainty Moderator Staff member. Joined Aug 16, Messages 22, 3. I usually let it run over night.