If you are experiencing problems while running PC .In order to determine whether the problems are caused by failing hardware, such as RAM.The Memory Tester(RAM tester) is needed.It will run a memory test on a dos mode to test your RAM status.Below are 3 top free memory tester available online.
1. Memtest86 and Memtest86+
Memtest86
Memtest86 is thorough, stand alone memory test for x86 architecture computers. BIOS based memory tests are a quick, cursory check and often miss many of the failures that are detected by Memtest86.. It selling for $12.95
Price includes shipping to North America (USA, Canada & Mexico). Only $13.95 for all other worldwide destinations. Sales tax will be added to Colorado orders.
And it's free for direct download.
Memtest86+ is a modified and improve version of Memtest86(deferent creator).They fixed the bug,other things like chipsets or CPU that were not correctly detected or not detected . For exemple, on i865PE/i875P series, memtest86+ will now display FSB & Memory frequency, PAT status, memory timings, ECC status and the number of memory channels. Next version will perhaps contain several enhancements and bug-fixes.
2. Windows Memory Diagnostic
Windows Memory Diagnostic is a memory testing tool provided by Microsoft. The diagnostic includes a comprehensive set of memory tests, to determine what wrong with your computer memory.use the diagnostic to determine whether the problems are caused by failing hardware, such as RAM or the memory system of your systemboard. Easy and fast. On most configurations, you can download the diagnostic, run the test and complete the first test pass in less than 30 minutes.
3. M2K MemScope
Testing memory is not always easy since many factors come in to play. Some tests are very short but to catch all possible errors it is often best to stress test the memory extensively.
Besides time, other factors to take account of are: memory, amount to test, memory speed and CPU speed.
MemScope presents an alternative algorithm to identify memory problems than those used in MicroScope.
Free Memory Tester by:Top Free Software ® http://topfreesoftware.blogspot.com/