MemTest86 fails only when RAM in dual-channel with default XMP on

[munem939]

So, I ran some RAM benchmarks and noticed that I have a ton of errors. I tested all of the RAM slots and individual RAM sticks, and they all work fine individually with the default XMP profile on. They work fine in dual channel, but only when the XMP is off. When I turn the XMP on and in dual channel, that's when I get all of the errors

I think I may have to play around with the voltages and CAS timings, but I don't even know where to begin with that

EFI Specifications	2.70
System
Manufacturer	Gigabyte Technology Co., Ltd.
Product Name	B450M DS3H
Version	Default string
Serial Number	Default string
BIOS
Vendor	American Megatrends Inc.
Version	F51
Release Date	07/29/2020
Baseboard
Manufacturer	Gigabyte Technology Co., Ltd.
Product Name	B450M DS3H-CF
Version	x.x
Serial Number	Default string
CPU Type	AMD Ryzen 5 3400G with Radeon Vega Graphics
CPU Clock	3714 MHz [Turbo: 4216.4 MHz]
# Logical Processors	8
L1 Cache	8 x 96K (94412 MB/s)
L2 Cache	8 x 512K (77391 MB/s)
L3 Cache	1 x 4096K (27216 MB/s)
Memory	14299M (19005 MB/s)
DIMM Slot #0	8GB DDR4 XMP PC4-25600
	Corsair / CMK16GX4M2B3200C16
	16-18-18-36 / 3200 MHz / 1.350V
DIMM Slot #1	8GB DDR4 XMP PC4-25600
	Corsair / CMK16GX4M2B3200C16
	16-18-18-36 / 3200 MHz / 1.350V

Result summary

Test Start Time	2020-10-03 14:47:55
Elapsed Time	0:33:27
Memory Range Tested	0x0 - 41F340000 (16883MB)
CPU Selection Mode	Parallel (All CPUs)
ECC Polling	Enabled
# Tests Passed	6/15 (40%)

Lowest Error Address	0x1060CE638 (4192MB)
Highest Error Address	0x11FF8FE38 (4607MB)
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]	1/2 (50%)	1
Test 3 [Moving inversions, ones & zeroes]	0/1 (0%)	22
Test 4 [Moving inversions, 8-bit pattern]	0/1 (0%)	34
Test 5 [Moving inversions, random pattern]	0/1 (0%)	42
Test 6 [Block move, 64-byte blocks]	0/1 (0%)	14
Test 7 [Moving inversions, 32-bit pattern]	0/1 (0%)	147
Test 8 [Random number sequence]	0/1 (0%)	22
Test 9 [Modulo 20, ones & zeros]	0/1 (0%)	7
Test 10 [Bit fade test, 2 patterns, 1 CPU]	1/1 (100%)	0
Test 13 [Hammer test]	0/1 (0%)	5

Last 10 Errors

2020-10-03 15:21:19 - [Data Error] Test: 3, CPU: 7, Address: 11A1CE038, Expected: 00000000, Actual: 00400000

2020-10-03 15:21:19 - [Data Error] Test: 3, CPU: 0, Address: 11D40F638, Expected: 00000000, Actual: 00400000

2020-10-03 15:21:19 - [Data Error] Test: 3, CPU: 2, Address: 10664F038, Expected: FFFFFFFF, Actual: FFBFFFFF

2020-10-03 15:21:19 - [Data Error] Test: 3, CPU: 3, Address: 10AE4F238, Expected: 00000000, Actual: 00400000

2020-10-03 15:21:19 - [Data Error] Test: 3, CPU: 7, Address: 11BB0FA38, Expected: 00000000, Actual: 00400000

2020-10-03 15:21:19 - [Data Error] Test: 3, CPU: 7, Address: 11B44E638, Expected: FFFFFFFF, Actual: FFBFFFFF

2020-10-03 15:21:18 - [Data Error] Test: 3, CPU: 7, Address: 11BD4EA38, Expected: 00000000, Actual: 00400000

2020-10-03 15:21:18 - [Data Error] Test: 3, CPU: 2, Address: 1078CEA38, Expected: 00000000, Actual: 00400000

2020-10-03 15:21:18 - [Data Error] Test: 3, CPU: 5, Address: 11280EE38, Expected: FFFFFFFF, Actual: FFBFFFFF

2020-10-03 15:21:18 - [Data Error] Test: 3, CPU: 7, Address: 11B44E638, Expected: FFFFFFFF, Actual: FFBFFFFF

[David (PassMark)]

If you aren't overclocking and just running the built in XMP profile, then the sticks should just work (without the need for you to tinker around).

So it is pretty sure the RAM is bad (or at least marginal).