Kingston Hyper X 16gb 1600Mhz Freezing

1.625v is fine. Not ideal but i highly doubt it'll do anything to your cpu. I've got a few rigs out in the wild running 1.62v on SB chips going on to a year, some with 4.8GHz clocks and about 1.4v top vcore and none have had issue, as much as 15 if i remember right as i bought a lot of a particular make of RAM that didn't want to run 1.5v at advertised speeds, think it was OCZ.
 
Surveyor said:
How have you come to believe that?

OcUK must have sold thousands of kits of Kingston HyperX for Sandy Bridge systems and it's always been recommended on this forum to try the RAM at ~1.5-1.55V.

There appears to have been very little trouble in running at less than 1.6V.

Even the OP in this thread appears to be now happily using 1.56V.
Click to expand...

For all those running hyperX @anything below 1.6v without issues is really good for them and great news, my belief that hyperX grey ram @ 1600mhz is not 100% compatible with SB is because this ram is supposed to run @ 1.65v at that speed.
Some moduels may well be ok with less voltage than the stated amount needed but clearly not all is stable with lower voltages. Now if it is correct that it is unsafe for SB to run @ 1.65v but the ram states that's what voltage it should be at for 1600mhz then surely you have to consider whether this ram is 100% compatible with SB. I am not dreaming up the numbers her but just stating what the hardware recommends and that SB is unsafe for those volts. Logical really.
 
Last edited:
Surveyor said:
There are a lot of steps to try between 1.55/1.56V and 1.65V.

The OP should try those first.

But before getting carried away with the voltage they should check that they have the correct timings set.

They seem to be 9-9-9-27 for all the 1600MHz Kingston HyperX.

And that the command rate is set to 2T.

Hopefully the XMP profile will have sorted those but they should check with CPU-Z (Memory tab).
Click to expand...

Out of curiosity what does the 2T bit do? think mine is at 1T and working (well was up until ive gone xfire)
Could that cause the system to crash?
Passed all prime tests and IBT test not a problem

Oh and im on 1600mhz
9-9-9-27
@ 1.506v
 
BaNksY IV said:
Out of curiosity what does the 2T bit do? think mine is at 1T and working (well was up until ive gone xfire)
Could that cause the system to crash?
Passed all prime tests and IBT test not a problem

Oh and im on 1600mhz
9-9-9-27
@ 1.506v
Click to expand...

When the Memory Controller first tries to access memory, it has to latch onto a memory bank, known as CS (Chip Select). Then it proceeds to find the column (CAS), the Row (RAS), and then return the data to the CPU. Now, 1T means it takes 1 clock cycle to "find" a memory bank, vs. 2T where it takes 2 clock cycles to "find" the memory bank.

1T gives slightly better performance than 2T but sometimes using 1T can cause instability.

Some of the 1600MHz kits at OcUK specifically state 2T.

If you can run at 1T then all to the good but I recommend starting out at 2T as it doesn't make a great deal of difference and it's one less thing to worry about if there are problems.
 
Last edited:
You must log in or register to reply here.
Back
Top Bottom