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Apply market research to generate audience insights. Measure content performance. Develop and improve products. List of Partners vendors. Tim Fisher. VP and General Manager, Lifewire. Tim Fisher has more than 30 years' of professional technology experience. He's been writing about tech for more than two decades and serves as the VP and General Manager of Lifewire.
Facebook Twitter LinkedIn. Updated on February 02, Tweet Share Email. Download Windows Memory Diagnostic. What We Like. What We Don't Like. Memory Diagnostic Tool problems : I ran the memory diagnostic tool after a blue screen showed up. The tool went thru the test and then restarted, but the blue screen still shows up. I tried to do the extended test, but it got hung and I had to restart. It seems that the tool is not fixing the problem.
The blue I have all my drivers updated and I heard that my ram can be the Windows Memory Diagnostic Tool : Hello, I started the above tool now it is just looping for the last 3 days. I dont have any installation media as I wasnt given any when I b9ought this PC, I think there may be a partition I can reinstall from. I d0ont want to reinstall I just want this awful piece of I have been quite often been getting a BSOD with a memory management error code. That code seems to point The system just would not boot after the crash.
I wanted a comprehensive Windows 10 includes the Windows Memory Diagnostics Tool to help Users found this page by searching for:. Your name or email address: Do you already have an account? I used to work in a computer shop where we started memtest on new machines on a more or less daily basis.
Without enough info to really say so I'd still guess your problem is likelier an over heating or bad driver one. Since you've tried more than one OS the driver part seems unlikely. Unless you've for example only tried different windows versions that use the same driver.
MemTest86 tries to do a complete test of the RAM. While doing so, it has also become a good all-around test, since some of the tests also touch upon the motherboard's memory controller and the CPU. RAM has much increased, to the point that a portable phone may today contain more RAM than for a mainframe of 20 years ago. Although the RAM has become faster, the tests are still time-consuming, measured in hours or even days. Now for the bad news : I have found at least two respectable sources, Ten Forums and wiki How that give the same advice.
I quote from Ten Forums:. If you run less than 8 passes you will be asked to run it again. I should remark that MemTest86 has two versions, the Free and Pro, where the Pro version has several more tests than the Free version and configuration options. You may see the differences in the article Feature Comparision.
More information about the optimal number of passes can be gleamed from the article MemTest86 Technical Information from the description of the MemTest86 config file, mt Specifies whether the first pass shall run the full or reduced test. By default, the first pass shall run a reduced test ie. Conclusion 1 : The first pass is shorter and faster, intended mostly to detect hard errors.
The fact that the first pass has passed without error is encouraging, but users of the Free version need to wait for the second pass for the full gamut of tests. This is a variation of the moving inversions algorithm that shifts the data pattern left one bit for each successive address. The starting bit position is shifted left for each pass. To use all possible data patterns 32 passes are required.
This test is quite effective at detecting data sensitive errors but the execution time is long. Conclusion 2 : Test 7 needs 32 passes to be totally complete, which I take as the upper bound on the number of passes required for a really exhaustive test. I also remark that many of the tests use a random pattern, with a different pattern for each pass, meaning that each pass is different.
Taking it to absurd heights, we might conclude that there is no upper limit to the number of passes required for an absolutely conclusive result. My opinion as regarding the number of passes is that one should run as many passes as one has the time to wait. The lower bound seems to be two passes, as only the second one will be a full test. But the question of "how much is enough" has no real answer. I note again that for the two technical references that I cited above, the minimal number of passes required for a good and conclusive result is 8 passes perhaps so that Test 7 will do one whole 8-bit byte, among other reasons.
On the other hand, errors found by MemTest86 should be taken very seriously. As the question was raised here about the acceptable amount of failures, my answer is that even one failure is too much and not acceptable.
In general it is better to run multiple passes. Here are three typical lengths of testing you might use:. When I suspect a RAM problem e. Dell computers with diagnostic lights I run memtest on one RAM module at a time in the first slot for hrs. Although memtest works the majority of the time, it failed me a couple of times.
I then tested it on a completely different computer, same thing, no errors. Operating system was completely unstable but no errors on memtest. I then used a different software named "PC-Check" from Eurosoft which is very similar to memtest but uses different algorithms. It is also bootable, does not need any operating system. It detected errors in less than 5 minutes. I then was able to send the module to Corsair RMA and get a replacement.
So, memtest is very good but not always enough. I currently use memtest and PC-check to check memory. If memtest fails to detect errors, PC check certainly will and vice versa.
And trust me, it happens more often than one would think. I'd say 3 passes is generally enough. If you want to be extra sure, do 8 or 9 passes, since Jeff saw errors in one case only on his 7th or later pass , but that can take forever! As a general rule of thumb, I think LAwLz got it correct here when she said emphasis added :.
In most cases memtest will start spitting out errors within a minute if the RAM stick is bad. After 3 passes it's Here is something to keep in mind though.
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