Performing below potential (23rd percentile) - ensure that a dual+ channel XMP BIOS profile is enabled

[Rainzord]

Hi there!

I have Corsair Vengeance LPX DDR4 2666 C16 2x8GB

And when I run UserBenchmark, these are the results:
2 of 4 slots used
16GB DIMM DDR4 clocked @ 2666 MHz
Performing below potential (23rd percentile) - ensure that a dual+ channel XMP BIOS profile is enabled.
Bench:
80% Very good

I have NO idea whatsoever how to ensure a dual + channel, nor how can I check it?

Here is my relevant CPU-Z info:

Chipset
-------------------------------------------------------------------------

Northbridge Intel Kaby Lake rev. 05
Southbridge Intel Z270 rev. 00
Graphic Interface PCI-Express
PCI-E Link Width x16
PCI-E Max Link Width x16
Memory Type DDR4
Memory Size 16 GBytes
Channels Dual
Memory Frequency 1333.7 MHz (1:20)
CAS# latency (CL) 16.0
RAS# to CAS# delay (tRCD) 18
RAS# Precharge (tRP) 18
Cycle Time (tRAS) 35
Row Refresh Cycle Time (tRFC) 467
Command Rate (CR) 2T
Uncore Frequency 800.0 MHz
Host Bridge 0x591F


Memory SPD
-------------------------------------------------------------------------

DIMM # 1
SMBus address 0x51
Memory type DDR4
Module format UDIMM
Manufacturer (ID) Corsair (7F7F9E0000000000000000)
Size 8192 MBytes
Max bandwidth DDR4-2666 (1333 MHz)
Part number CMK16GX4M2Z2666C16
Nominal Voltage 1.20 Volts
EPP no
XMP yes
XMP revision 2.0
AMP no
JEDEC timings table CL-tRCD-tRP-tRAS-tRC @ frequency
JEDEC #1 9.0-11-11-20-30 @ 750 MHz
JEDEC #2 10.0-12-12-22-34 @ 834 MHz
JEDEC #3 11.0-13-13-24-37 @ 917 MHz
JEDEC #4 12.0-14-14-27-40 @ 1000 MHz
JEDEC #5 13.0-15-15-29-44 @ 1084 MHz
JEDEC #6 14.0-16-16-31-47 @ 1167 MHz
JEDEC #7 15.0-17-17-33-50 @ 1251 MHz
JEDEC #8 16.0-18-18-35-53 @ 1333 MHz
JEDEC #9 17.0-18-18-35-53 @ 1333 MHz
JEDEC #10 18.0-18-18-35-53 @ 1333 MHz
JEDEC #11 19.0-18-18-35-53 @ 1333 MHz
JEDEC #12 20.0-18-18-35-53 @ 1333 MHz
XMP profile XMP-2666
Specification DDR4-2666
Voltage level 1.200 Volts
Min Cycle time 0.750 ns (1333 MHz)
Max CL 16.0
Min tRP 13.49 ns
Min tRCD 13.49 ns
Min tRAS 26.11 ns
Min tRC 39.74 ns
Min tRRD 3.74 ns
XMP timings table CL-tRCD-tRP-tRAS-tRC-CR @ frequency (voltage)
XMP #1 9.0-11-11-20-30-n.a @ 750 MHz (1.200 Volts)
XMP #2 10.0-12-12-22-34-n.a @ 834 MHz (1.200 Volts)
XMP #3 11.0-13-13-24-37-n.a @ 917 MHz (1.200 Volts)
XMP #4 12.0-14-14-27-40-n.a @ 1000 MHz (1.200 Volts)
XMP #5 13.0-15-15-29-44-n.a @ 1084 MHz (1.200 Volts)
XMP #6 14.0-16-16-31-47-n.a @ 1167 MHz (1.200 Volts)
XMP #7 15.0-17-17-33-50-n.a @ 1251 MHz (1.200 Volts)
XMP #8 16.0-18-18-35-53-n.a @ 1333 MHz (1.200 Volts)
XMP #9 17.0-18-18-35-53-n.a @ 1333 MHz (1.200 Volts)
XMP #10 18.0-18-18-35-53-n.a @ 1333 MHz (1.200 Volts)
XMP #11 19.0-18-18-35-53-n.a @ 1333 MHz (1.200 Volts)
XMP #12 20.0-18-18-35-53-n.a @ 1333 MHz (1.200 Volts)

DIMM # 2
SMBus address 0x53
Memory type DDR4
Module format UDIMM
Manufacturer (ID) Corsair (7F7F9E0000000000000000)
Size 8192 MBytes
Max bandwidth DDR4-2666 (1333 MHz)
Part number CMK16GX4M2Z2666C16
Nominal Voltage 1.20 Volts
EPP no
XMP yes
XMP revision 2.0
AMP no



----------------------------------------------------------------------

Can anyone help me?
What am I doing wrong?!

Thank u!

 

[Vic 40]

In cpu-z under the memory tab you can see if you run dualchannel.If the motherboard only has two dimmslots are you running it anyway,if it has four use the slots 2+4 from the cpu out.

I would set "Command Rate" to 1T since using only two sticks of ram,

Chipset
-------------------------------------------------------------------------

Northbridge Intel Kaby Lake rev. 05
Southbridge Intel Z270 rev. 00
Graphic Interface PCI-Express
PCI-E Link Width x16
PCI-E Max Link Width x16
Memory Type DDR4
Memory Size 16 GBytes
Channels Dual
Memory Frequency 1333.7 MHz (1:20)
CAS# latency (CL) 16.0
RAS# to CAS# delay (tRCD) 18
RAS# Precharge (tRP) 18
Cycle Time (tRAS) 35
Row Refresh Cycle Time (tRFC) 467
Command Rate (CR) 2T
Uncore Frequency 800.0 MHz

 

[Rainzord]

In cpu-z under the memory tab you can see if you run dualchannel.If the motherboard only has two dimmslots are you running it anyway,if it has four use the slots 2+4 from the cpu out.

I would set "Command Rate" to 1T since using only two sticks of ram,

Chipset
-------------------------------------------------------------------------

Northbridge Intel Kaby Lake rev. 05
Southbridge Intel Z270 rev. 00
Graphic Interface PCI-Express
PCI-E Link Width x16
PCI-E Max Link Width x16
Memory Type DDR4
Memory Size 16 GBytes
Channels Dual
Memory Frequency 1333.7 MHz (1:20)
CAS# latency (CL) 16.0
RAS# to CAS# delay (tRCD) 18
RAS# Precharge (tRP) 18
Cycle Time (tRAS) 35
Row Refresh Cycle Time (tRFC) 467
Command Rate (CR) 2T
Uncore Frequency 800.0 MHz

I went to my Bios and changed it to XMP -> from disabled to Profile1 (though I must say CPUz has shown I have dual even before I did this).

Still same results.

Is it possible that my Memory Cards are just low quality?

Is changing Command Rate to 1T dangerous by any means? could it break my PC?

 

[Vic 40]

Is changing Command Rate to 1T dangerous by any means? could it break my PC?

No,worst case you have to do a clear cmos because you get already faults when trying to start the pc,might also give bluescreens if it makes things unstable,but i doubt this will happen. The 2T is imo and afaik really for when using four sticks of ram where the memory controller is more stressed ,but you say you don't use four sticks.

 

[Rainzord]

Is changing Command Rate to 1T dangerous by any means? could it break my PC?

No,worst case you have to do a clear cmos because you get already faults when trying to start the pc,might also give bluescreens if it makes things unstable,but i doubt this will happen. The 2T is imo and afaik really for when using four sticks of ram where the memory controller is more stressed ,but you say you don't use four sticks.

Correct, I'm only using 2 sticks. Alrighty then, I will change to 1T and try it out!

 

[Rainzord]

Well, it did improve it by a little margin... to about 30% performance (56.9 ns). Still writes "ensure that a dual+ channel XMP BIOS profile is enabled" - no idea why since CPUz shows it is running on dual. Weird.

 

[Vic 40]

Could well be that it is just a suggestion since they suggest your ram is,according to them,underperforming.

 

[Rainzord]

That is interesting. I just ran a benchmark using PassMark Software. Are you familiar with it?
In there, the Benchmark I'm getting is 89% (out of 100%), which is supposedly very good.

So I'm really not sure anymore. I guess it's fine and I should leave the 1T and Profile1 tweaks I made since it runs well (now and before).

 

[Vic 40]

That is interesting. I just ran a benchmark using PassMark Software. Are you familiar with it?
In there, the Benchmark I'm getting is 89% (out of 100%), which is supposedly very good.

No i don't. I do have the "Userbenchmark",but with me all except gpu (integrated right now) is above mediocre.

So I'm really not sure anymore. I guess it's fine and I should leave the 1T and Profile1 tweaks I made since it runs well (now and before).

Yeah you seem fine.