By default, the utility runs through a series of up to 13 different algorithmic test patterns. A single pass can catch glaring errors, but letting the system run for 4 complete passes is highly recommended to pinpoint intermittent, thermal-induced, or voltage-related errors.
If your screen remains clean and shows zero errors after 4 passes, your RAM is structurally sound. If bright red error lines populate the bottom section of the screen, your memory subsystem has failed a check. What to Do If Errors Are Detected memtest 64 bit iso download
Once loaded, the tool begins scanning your hardware automatically using standard testing algorithms. By default, the utility runs through a series
The MemTest interface will initialize immediately without loading Windows. Step 4: Run the Diagnostic Scan If bright red error lines populate the bottom
+-------------------------------------------------------------------------+ | MemTest86+ V8.00 Intel Core i7-14700K CLK: 3.40 GHz | | Pass: 2/4 DDR5 Memory: 32GB Temp: 41°C | | Test: #6 [Moving inversions, 32-bit pattern] | |-------------------------------------------------------------------------| | Total Progress: [======================>-----------------] 54% | | Test Progress: [========================================] 100% | |-------------------------------------------------------------------------| | Err@ 0x0001D4F02A - Expected: 0x00000000, Found: 0x00000010 - Bits: 4 | | Err@ 0x0001D4F02E - Expected: 0xFFFFFFFF, Found: 0xFFFFFFEF - Bits: 4 | | | | [FAIL] Memory Errors Detected! Check address range listed above. | +-------------------------------------------------------------------------+
There are two major, actively maintained versions of this utility. Both fully support 64-bit hardware, DDR4/DDR5 modules, and modern UEFI firmware. PassMark MemTest86 (Free/Pro) MemTest86+ (Open Source) Proprietary Freeware / Paid Pro 100% Free Open-Source (GPL) Primary Media USB Flash Drive ( imageUSB ) USB Installer / Linux ISO / GRUB ISO 64-bit & UEFI Full Native Support Full Native Support DDR5 & XMP Yes, with temperature reporting Yes, with XMP 3.0 fixes Interface Modern GUI with mouse support Classic blue CLI text interface Step 1: Secure the Correct 64-bit ISO Download