1.65V and Ivy

[beisat]

Hi everyone

I'm thinking of upgrading to ivy, and have got following in mind:

core i5 3570k
Asus P8Z77-M

Now someone in my place gave me following ram he doesn't need:
KHX1600C9D3K3/12GX (Edit: 3 Sticks à 4GB) 1.65V

Thing is, these are 1.65V, and since already sandy bridge only supported max. 1.5V I surfed to Asus Page and checked the Qualified Vendor List (http://dlcdnet.asus.com/pub/ASUS/mb/LGA1155/P8Z77-M/P8Z77-M-QVL.pdf)

Thing is, they list KHX1600c9d3k3/12gx(XMP) as working. My Question: Nowhere on my RAM does it say (XMP), is this relevant / are those different RAM. And why does Asus list these RAMs even though they are 1.65V? If XMP should be irrelevant, would I run a risk using these 1.65V or should I just spend my 70$ for 2x4GB 1.25V GSkill or something?

Thanks for the help!

 

[FAUguy]

Its listed on NewEgg:
http://www.newegg.com/Product/Produc...82E16820104127
It says its a triple channel kit. How many sticks did the person give you?
You should be able to run two of those at 1.65v without a problem, but the RAM is limited to 1600MHz. Most new 1600MHz RAM is 1.50V. I'm using 4 sticks of Mushkin 4GB 2133MHz RAM and it requires 1.65v.

 

[beisat]

Yeah its a triple channel / 3 sticks (sorry for not writing that, though it was clear from the 12GX but is not of course). I was thinking of putting all 3 sticks in, but 2 also would be fine.

I'm fine with a limit of 1600Mhz, Ivy doesn't support more anyways as far as I understand / I don't OC anyway, just need a stable, fast system without danger of damaging any components. That's why I'm nervous about the (XMP) part and also why I don't understand how 1.65V can work if not supported by Intel.

 

[ShintaiDK]

1.65V is overvoltage and there is a risk yes. Sandy and Ivy maximum supports up to 1.575V from Intel.

Also that 1.65V is funny enough 1.5V chips. Just overvolted, overclocked and sold with a premium.

 

[dma0991]

1.65V shouldn't be a problem for IB as the IMC is beefed up from SB. I currently do not like the HyperX as I'm getting BSODs when I enable the XMP profiles on a IB rig. The kit that I have just couldn't handle at its actual rated speed of 1600MHz @ 1.65V. I find it no different from 1.5V Kingston Value RAM that is overclocked and heatspreader slapped on the RAM.

Might just consider re-purposing this Kingston kit for another low end rig and get myself some GSkill kits for my IB rig.

 

[kbp]

I believe the 1.65 is for the XMP profile. It will run at 1333 on 1.5 volts all day with no problem. On my Asus Z68 I can offset the 1.65v ram to be within the 10% of my CPU voltage.

 

[tweakboy]

You need phase or water cooling ,,, for that cpu voltage... gl

 

[IntelEnthusiast]

With the 3rd generation Intel® Core™ processors you want to use memory that is rated at 1.5v ±5% (1.425v to 1.575v). I have heard form a number of people who have used the 1.65v or high voltage and have damaged their processors on the other generation Intel Core processors.

 

[Don Karnage]

With the 3rd generation Intel® Core™ processors you want to use memory that is rated at 1.5v ±5% (1.425v to 1.575v). I have heard form a number of people who have used the 1.65v or high voltage and have damaged their processors on the other generation Intel Core processors.

I and others have ran 1.65v memory for over a year on sandy bridge processors without issue. If you want to run high speeds you need to push the volts.

 

[beisat]

Thanks everyone for the replies! I'm getting very mixed signals here, I thought the answer would be much clearer and there would be consensus. So far I gather, it may well work (seeing also that Asus clearly lists them as compatible), they may not run at 1600MHz though and also it's not really optimal for Ivy in any way / includes a certain risk.
For me, I think I'll just go with different RAMs than. 8GB should suffice, any suggestions? G.Skill sound ok, but some of them are 1.25V which is lower then has been suggested in this thread (+-5% from 1.5V)

 

[LOL_Wut_Axel]

Just try to run the 1.65V kit at 1.60V. Unless it's a crap kit, it should do so just fine.

You want really good RAM for cheap? Buy four of these:
http://www.newegg.com/Product/Produc...82E16820147094

 

[Jman13]

My HyperX 1.65V sticks run just fine at 1.5V and 1600MHz, so give it a shot.

 

[Prey2big]

Under no circumstance use anything but dual channel memory configuration. You will lose substantial performance in single channel mode.

 

[jacktesterson]

Under no circumstance use anything but dual channel memory configuration. You will lose substantial performance in single channel mode.

3-5% is not substantial in my book.

In fact, you wouldn't see a difference unless your benching for the difference.

 

[fixbsod]

Yeah, I would sell that RAM if I were you and buy 1.5v sticks. Triple channel RAM was on some of the older i7-9xx series intels. SB/IB uses dual channel RAM, SB-E uses quad channel. SB/IB want 1.5v as well. It could likely work, but I would sell it and get something that was geared more for your platform in order to ensure the highest compat, and fastest performance.

 

[jacktesterson]

I recently got my Corsair Vengance Ram, 1.5v 1866, for $60 shipped.

 

[jacktesterson]

With the 3rd generation Intel® Core™ processors you want to use memory that is rated at 1.5v ±5% (1.425v to 1.575v). I have heard form a number of people who have used the 1.65v or high voltage and have damaged their processors on the other generation Intel Core processors.

I appreciate your input on these forums, but 1.65v is pretty safe.

Ive never heard tell of anyone having problems running these volts using Sandy.

 

[Don Karnage]

I run these at 2400 at 1.55v

http://www.newegg.com/Product/Produc...82E16820231468

 

[Prey2big]

3-5% is not substantial in my book.

In fact, you wouldn't see a difference unless your benching for the difference.

You are talking about differences between RAM speeds? Running anything in half of the memory bandwidth is gonna severely punish your performance.

 

[Zorander]

With the 3rd generation Intel® Core™ processors you want to use memory that is rated at 1.5v ±5% (1.425v to 1.575v). I have heard form a number of people who have used the 1.65v or high voltage and have damaged their processors on the other generation Intel Core processors.

I'm currently using a pair of 1.65V 1600MHz (XMP mode) modules with my Lynnfield i7-860. I have had no problem with this setup in its 2 years of use.

Am I looking at having to replace those modules if I go the IB route then?

 

[LagunaX]

I've used G.Skill and Mushkin DDR3 2133 @ 1.65v on both my 4.8ghz 2500k and 2600k for over a year without any issues before I switched to using the Samsung 30nm overclocked to DDR3 2133 9-10-10-28 1T @ 1.55-1.6v.

 

[Zorander]

I've used G.Skill and Mushkin DDR3 2133 @ 1.65v on both my 4.8ghz 2500k and 2600k for over a year without any issues before I switched to using the Samsung 30nm overclocked to DDR3 2133 9-10-10-28 1T @ 1.55-1.6v.

Would this mean that it is safe to run an IB at stock speed and at XMP memory profile (my intended usage)?

Is there clear-cut rule that SB/IB officially does not support 1.65V (but anything before does) or has this voltage always been not officially supported?

 

[LagunaX]

Intel might not spec it as 'safe' but you can start a poll on hour many problems ppl have run into with running DDR3 @ 1.65v for SB - I doubt you will find any.

Check out this ram made for z77 and 3rd Gen Intel Core processors (Ivy Bridge):
http://www.newegg.com/Product/Produc...82E16820231587
1.65v, huh?

 

[ShintaiDK]

Intel might not spec it as 'safe' but you can start a poll on hour many problems ppl have run into with running DDR3 @ 1.65v for SB - I doubt you will find any.

Check out this ram made for z77 and 3rd Gen Intel Core processors (Ivy Bridge):
http://www.newegg.com/Product/Produc...82E16820231587
1.65v, huh?

Im sure you forgot the fineprint.

Anything above 1.575V on SB or Ivy voids warranty and is over spec. Nomatter how you try and pack it in.

 

[MrK6]

Intel might not spec it as 'safe' but you can start a poll on hour many problems ppl have run into with running DDR3 @ 1.65v for SB - I doubt you will find any.

Check out this ram made for z77 and 3rd Gen Intel Core processors (Ivy Bridge):
http://www.newegg.com/Product/Produc...82E16820231587
1.65v, huh?

SB hasn't been out long enough for 1.65V on the RAM to start killing CPU's. It's not enough to wipe them out immediately, but that doesn't mean it's safe.

As a few others have mentioned, pop the sticks in and run them as fast as possible (with the tightest timings) @ 1.575V. Like any other computer part, speed + parameters (timings in this case) are dependent on voltage, and stock settings can be considered a "suggestion" by the manufacturer. I'm running a 2133 kit specified for 1.6V @ 1.55V and tighter timings to boot.