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Hi, I've recently been getting BSODs on my workstation which was rock solid for the last 3 years until about 2 months ago. During normal usage (email, web surfing and application development) I've had no issues, but I've seen a big uptick in BSODs and application crashes to desktop playing games and using 3d graphics software (although not when developing image processing applications). Since it seems to only happen when running graphics intensive applications, I first ran video memory diagnostics, but those all returned zero errors so my next stop was memtest86 v7.0. I ran booting off of USB with the default settings and got zero errors on pass 1 but failed on passes 2-4 in the row hammer test. There are only 3 bits flagged as bad by the report so I'm wondering:
1) Are these real errors?
2) Why did I pass on Pass1 but not 2 - 4?
3) Is there any way to tell which DIMM the issue is in from the reported memory addresses or do i just have to test 1 DIMM at a time until i find the bad one(s)?
Here is the report:
and here is my system info:
I guess despite it only being 3 potentially bad bits, since I'm seeing recent BSOD and crash-to-desktop behavior, i should isolate the DIMM(s) and replace them, but before I do that, I'm just wondering if there are any chances of "false positives" and how i can tell them apart from "real" errors.
thanks in advance for any info\answers!!
1) Are these real errors?
2) Why did I pass on Pass1 but not 2 - 4?
3) Is there any way to tell which DIMM the issue is in from the reported memory addresses or do i just have to test 1 DIMM at a time until i find the bad one(s)?
Here is the report:
| Test Start Time | 2018-04-27 12:34:25 |
| Elapsed Time | 7:47:57 |
| Memory Range Tested | 0x0 - 81F000000 (33264MB) |
| CPU Selection Mode | Parallel (All CPUs) |
| ECC Polling | Enabled |
| # Tests Passed | 46/48 (95%) |
| Lowest Error Address | 0xA42C62E0 (2626MB) |
| Highest Error Address | 0x3A32C4E30 (14898MB) |
| Bits in Error Mask | 0000000042000100 |
| Bits in Error | 3 |
| Max Contiguous Errors | 1 |
| Test | # Tests Passed | Errors |
| Test 0 [Address test, walking ones, 1 CPU] | 4/4 (100%) | 0 |
| Test 1 [Address test, own address, 1 CPU] | 4/4 (100%) | 0 |
| Test 2 [Address test, own address] | 4/4 (100%) | 0 |
| Test 3 [Moving inversions, ones & zeroes] | 4/4 (100%) | 0 |
| Test 4 [Moving inversions, 8-bit pattern] | 4/4 (100%) | 0 |
| Test 5 [Moving inversions, random pattern] | 4/4 (100%) | 0 |
| Test 6 [Block move, 64-byte blocks] | 4/4 (100%) | 0 |
| Test 7 [Moving inversions, 32-bit pattern] | 4/4 (100%) | 0 |
| Test 8 [Random number sequence] | 4/4 (100%) | 0 |
| Test 9 [Modulo 20, ones & zeros] | 4/4 (100%) | 0 |
| Test 10 [Bit fade test, 2 patterns, 1 CPU] | 4/4 (100%) | 0 |
| Test 13 [Hammer test] | 2/4 (50%) | 3 |
| Last 10 Errors |
| [Data Error] Test: 13, CPU: 0, Address: 3A32C4E30, Expected: D1308F30, Actual: 91308F30 |
| [Data Error] Test: 13, CPU: 0, Address: 1032C4138, Expected: 4414C326, Actual: 4614C326 |
| [Data Error] Test: 13, CPU: 0, Address: A42C62E0, Expected: D85C4FDE, Actual: D85C4EDE |
and here is my system info:
| EFI Specifications | 2.31 |
| System | |
| Manufacturer | MSI |
| Product Name | MS-7752 |
| Version | 1.0 |
| Serial Number | To be filled by O.E.M. |
| BIOS | |
| Vendor | American Megatrends Inc. |
| Version | V2.11 |
| Release Date | 07/10/2013 |
| Baseboard | |
| Manufacturer | MSI |
| Product Name | Z77A-G45 (MS-7752) |
| Version | 1.0 |
| Serial Number | To be filled by O.E.M. |
| CPU Type | Intel Core i5-3570K @ 3.40GHz |
| CPU Clock | 3400 MHz [Turbo: 4200.0 MHz] |
| # Logical Processors | 4 |
| L1 Cache | 4 x 64K (117576 MB/s) |
| L2 Cache | 4 x 256K (63912 MB/s) |
| L3 Cache | 6144K (34498 MB/s) |
| Memory | 32740M (19496 MB/s) |
| DIMM Slot #0 | 8GB DDR3 XMP PC3-12800 |
| G Skill Intl / F3-1600C9-8GSR | |
| 9-9-9-24 / 1600 MHz / 1.500V | |
| DIMM Slot #1 | 8GB DDR3 XMP PC3-12800 |
| G Skill Intl / F3-1600C9-8GSR | |
| 9-9-9-24 / 1600 MHz / 1.500V | |
| DIMM Slot #2 | 8GB DDR3 XMP PC3-12800 |
| G Skill Intl / F3-1600C9-8GSR | |
| 9-9-9-24 / 1600 MHz / 1.500V | |
| DIMM Slot #3 | 8GB DDR3 XMP PC3-12800 |
| G Skill Intl / F3-1600C9-8GSR | |
| 9-9-9-24 / 1600 MHz / 1.500V |
I guess despite it only being 3 potentially bad bits, since I'm seeing recent BSOD and crash-to-desktop behavior, i should isolate the DIMM(s) and replace them, but before I do that, I'm just wondering if there are any chances of "false positives" and how i can tell them apart from "real" errors.
thanks in advance for any info\answers!!
kits. Is it safe to assume that I only need to replace the kit with the DIMM that failed or is there some reason why i should replace them all? Also, the test I originally posted came back with 3 errors total in test 13. As stated, after re-testing with 1 DIMM and then its pair, I got 1 error and then 2 errors respectively. Is that 3rd error in the original test pass something that i should be concerned about? Ie. should the errors "add up" and the fact that I am only seeing 2 errors now when there were 3 before hint that maybe there are more faulty DIMMs than the 2 I have tentatively identified...?
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