errors found - can't understand this errors

[threedyart]

hi all
I have this 4 rams from 3 years ago or more
in the past 4 days, i began to see (blue screen, and windows crashes)
I tried Memtest but I ended the test after 3 hours 52 min
errors found please help
I can't understand this errors
I need to know if these errors are making my rams failure or not.
if there is anything to do as repair please tell me
I've uploaded my computer info.
thanks in advance

Summary

Report Date	2017-11-18 14:55:32
Generated by	MemTest86 V7.4 Pro (64-bit)
Result	FAIL

System Information

EFI Specifications	2.31
System
Manufacturer	Gigabyte Technology Co., Ltd.
Product Name	B85-HD3
Version	To be filled by O.E.M.
Serial Number	To be filled by O.E.M.
BIOS
Vendor	American Megatrends Inc.
Version	F11
Release Date	08/12/2015
Baseboard
Manufacturer	Gigabyte Technology Co., Ltd.
Product Name	B85-HD3
Version	x.x
Serial Number	To be filled by O.E.M.
CPU Type	Intel Core i7-4770K @ 3.50GHz
CPU Clock	3492 MHz [Turbo: 3691.4 MHz]
# Logical Processors	8 (4 enabled for testing)
L1 Cache	4 x 64K (191462 MB/s)
L2 Cache	4 x 256K (57322 MB/s)
L3 Cache	8192K (41890 MB/s)
Memory	32660M (16956 MB/s)
DIMM Slot #0	8GB DDR3 XMP PC3-12800
	G Skill Intl / F3-1600C9-8GXM
	9-9-9-24 / 1600 MHz / 1.500V
DIMM Slot #1	8GB DDR3 XMP PC3-12800
	Crucial Technology / BLS8G3D1609DS1S00. / A801389F
	9-9-9-24 / 1600 MHz / 1.500V
DIMM Slot #2	8GB DDR3 XMP PC3-12800
	G Skill Intl / F3-1600C9-8GXM
	9-9-9-24 / 1600 MHz / 1.500V
DIMM Slot #3	8GB DDR3 XMP PC3-12800
	Crucial Technology / BLS8G3D1609DS1S00. / A7031CA0
	9-9-9-24 / 1600 MHz / 1.500V

Result summary

Test Start Time	2017-11-18 11:01:41
Elapsed Time	3:52:53
Memory Range Tested	0x0 - 82E600000 (33510MB)
CPU Selection Mode	Sequential (All CPUs)
ECC Polling	Enabled
# Tests Passed	19/23 (82%)

Lowest Error Address	0x74E0DBEBC (29920MB)
Highest Error Address	0x74E0DBEBC (29920MB)
Bits in Error Mask	0000000000400000
Bits in Error	1
Max Contiguous Errors	1

Test	# Tests Passed	Errors
Test 0 [Address test, walking ones, 1 CPU]	2/2 (100%)	0
Test 1 [Address test, own address, 1 CPU]	2/2 (100%)	0
Test 2 [Address test, own address]	2/2 (100%)	0
Test 3 [Moving inversions, ones & zeroes]	2/2 (100%)	0
Test 4 [Moving inversions, 8-bit pattern]	2/2 (100%)	0
Test 5 [Moving inversions, random pattern]	2/2 (100%)	0
Test 6 [Block move, 64-byte blocks]	2/2 (100%)	0
Test 7 [Moving inversions, 32-bit pattern]	2/2 (100%)	0
Test 8 [Random number sequence]	0/2 (0%)	6
Test 9 [Modulo 20, ones & zeros]	1/1 (100%)	0
Test 10 [Bit fade test, 2 patterns, 1 CPU]	0/1 (0%)	1
Test 11 [Random number sequence, 64-bit]	1/1 (100%)	0
Test 12 [Random number sequence, 128-bit]	1/1 (100%)	0
Test 13 [Hammer test]	0/1 (0%)	39

Last 10 Errors

[Data Error] Test: 8, CPU: 0, Address: 74E0DBEBC, Expected: 87A8111F, Actual: 87E8111F

Certification

This document certifies that the Tests described above have been carried out by a suitably qualified technician on the System described above.

Signed

___________________________

Put your company name here:
Level 5, 63 Foveaux St, Surry Hills, 2010, Sydney, Australia
Phone + 61 2 9690 0444 Fax + 61 2 9690 0445
E-Mail: info@passmark.com

[David (PassMark)]

Bits in Error Mask 0000000000400000
Bits in Error 1

So it looks like you have a single bit RAM error at memory address 74E0DBEBC, which is causing several of the tests to fail.

So this fact combined with the instability in Windows means it is extremely likely that you have a bad RAM stick,

See also this page for more details of RAM errors and the Hammer test result.
https://www.memtest86.com/troubleshooting.htm

[threedyart]

thank you, David, but I don't understand which ram had the error, and that means that I need to buy a new ram???

[David (PassMark)]

You will probably need to test the sticks one at a time to locate the faultly one (or in pairs to start with).

> ...and that means that I need to buy a new ram???

You can't fix RAM sticks. So you either remove it, replace it, or ignore it.

[threedyart]

Thank you very much David
I appreciate you help.
Mina