Ram voltage differences

[Mobin Ali]

Hello Tom's awesome community.

Recently I asked my brother to get me 2x8GB 2133mhz rams for my PC. ( I live in a different country and PC parts are expensive)
Anyway, the retailer gave my brother 2 different Rams not a set.
1x8GB corsair Vengeance PRO 2133 1.5v
1x8GB Kingston HyperX Beast 2133 1.6v

There is no way for me to return them since it will take a long time (about 6 months) to replace them. so I decided to stick with them.
I realize that these each actually come in a set of 2 after checking online.

When I plugin the HyperX Beast, I can change the XMP profile and it works on 2133mhz @ 1.6v
without XMP it works 1600mhz @ 1.5v
The Corsair Vengeance PRO works at 1.5v all the the time. doesn't decrease/increase in voltage with or without XMP.

when i plugged in both, to run them at Dual Channel, my motherboard gave me a msg saying that it changed the setting for the PC to be able to boot. I checked the bios, rams are at 1333 @ 1.5v.
computer is working fine.

My question is, can I do something so that I can run them at 2133mhz together or is 1333 more than enough? or should I just stick to single channel 2133mhz? underclock? overclock?

Main purpose is gaming/web dev/surfing/chatting.

How much of performance am I loosing while using it at 1333mhz?

Specs.
i5 4670k running at Stock.
Gigabyte Z87X-D3H
HD 7850 @ 1250/1450
HyperX 3k 240GB SSD
5 HDD's (various capacities)
closed loop liquid cooler for CPU
650w PSU

Guys, any input would be appreciated. Sorry if I have taken your valuable time for something this small.
Thank You.

 

[Zerk2012]

With a Intel processor it's best to stick to 1.5V as recommended by Intel for the memory controller. Since the PC will boot with both sticks go into BIOS leave everything the same but change the frequency to run 1600MHz'
If this is for gaming you will see no noticeable difference with any of the speeds, if you were editing or using other work programs then it would make a bigger difference.

 

[Tradesman1]

Try setting them manually to 2133 at the 1.6 and slower timings, it's safe and if they play nice you get the additional bandwidth you paid for

 

[capt_taco]

I agree, try setting both sticks to 1.6V with matching timings and hope for the best. You can run 1.5V memory at 1.6V; it may wear it out faster, but it should work.

Running a 1.6V stick at 1.5V I would not trust in the long term. Undervoltage is how you often end up with seemingly random freezing and crashing that will have you pulling your hair out.. It seems your system is compensating for it now, but really it could destabilize whenever, for no apparent reason. (In that case, the fix would be to bump the voltage to 1.6V ... so might as well head that problem off now).

 

[Mobin Ali]

I like the idea to get both to 1.6v. Could you explain to me which timings i should use? like give me a bunch of timings to try out? I have never done anything like this before.

 

[Pinhedd]

I like the idea to get both to 1.6v. Could you explain to me which timings i should use? like give me a bunch of timings to try out? I have never done anything like this before.

They should both run at 1.6 volts just fine. As for the timings, try a standard JEDEC profile such as DDR3-2133L at first such as 12-12-12-30 and if that works (make sure to test it thoroughly) try entering the timings of the looser module. You may be able to tighten them up to 11-11-11-28 or lower. I would avoid using non-standard timings such as 10-11-10-29.

 

[Mobin Ali]

I tried a few things, but no joy.
12-12-12-30 @1.6v @2133mhz. no boot
11-11-11-28 @1.6v @2133mhz. no boot
11-11-11-28 @1.6v @1600mhz Booted.

I'm out of idea's. Am I doing anything wrong? there just too many options in this motherboard. i just changed the 4 things on the top for timing and voltage.

 

[Pinhedd]

I tried a few things, but no joy.
12-12-12-30 @1.6v @2133mhz. no boot
11-11-11-28 @1.6v @2133mhz. no boot
11-11-11-28 @1.6v @1600mhz Booted.

I'm out of idea's. Am I doing anything wrong? there just too many options in this motherboard. i just changed the 4 things on the top for timing and voltage.

Can you post the part numbers for your two kits?

 

[Mobin Ali]

Pinhedd, I did a mistake and did not double check. I set the voltage to 1.160v because i didnt see any other option until i scrolled down and checked there were more voltage options.
sorry for being a pin head .
Anyway, now I have booted with 1.6v.
CPU ID
Memory SPD
-------------------------------------------------------------------------

DIMM # 1
SMBus address 0x51
Memory type DDR3
Module format UDIMM
Manufacturer (ID) Corsair (7F7F9E00000000000000)
Size 8192 MBytes
Max bandwidth PC3-10700 (667 MHz)
Part number CMY16GX3M2A2133C11
Number of banks 8
Nominal Voltage 1.50 Volts
EPP no
XMP yes
XMP revision 1.3
AMP no
JEDEC timings table CL-tRCD-tRP-tRAS-tRC @ frequency
JEDEC #1 5.0-5-5-14-19 @ 380 MHz
JEDEC #2 6.0-6-6-17-23 @ 457 MHz
JEDEC #3 8.0-8-8-22-30 @ 609 MHz
JEDEC #4 9.0-9-9-24-33 @ 666 MHz
XMP profile XMP-2132
Specification PC3-17100
Voltage level 1.500 Volts
Min Cycle time 0.938 ns (1066 MHz)
Max CL 11.0
Min tRP 10.24 ns
Min tRCD 10.24 ns
Min tWR 15.00 ns
Min tRAS 25.25 ns
Min tRC 35.63 ns
Min tRFC 301.00 ns
Min tRTP 8.38 ns
Min tRRD 6.50 ns
Command Rate 1T
XMP timings table CL-tRCD-tRP-tRAS-tRC-CR @ frequency (voltage)
XMP #1 6.0-7-7-15-21-1T @ 586 MHz (1.500 Volts)
XMP #2 11.0-11-11-27-38-1T @ 1066 MHz (1.500 Volts)

DIMM # 2
SMBus address 0x53
Memory type DDR3
Module format UDIMM
Manufacturer (ID) Kingston (7F980000000000000000)
Size 8192 MBytes
Max bandwidth PC3-10700 (667 MHz)
Part number KHX2133C11D3/8GX
Serial number 712B9C46
Manufacturing date Week 47/Year 13
Number of banks 8
Nominal Voltage 1.50 Volts
EPP no
XMP yes
XMP revision 1.3
AMP no
JEDEC timings table CL-tRCD-tRP-tRAS-tRC @ frequency
JEDEC #1 6.0-6-6-17-23 @ 457 MHz
JEDEC #2 7.0-7-7-20-27 @ 533 MHz
JEDEC #3 8.0-8-8-22-30 @ 609 MHz
JEDEC #4 9.0-9-9-24-33 @ 666 MHz

clock is 11 11 11 28 NB FREQ : 1899.6mhz not 2133 (donno why, but it was 3799 a second ago)