1.65v on Haswell?

[Yingda Wang]

Hello,
I heard 1.65V is bad for Ivy and Sandy But does the same apply for haswell
I have a GB Z87 Ud3H and the description says support for 1.5v
However, Almost all the kingston hyperx are 1.65V
Would using those rams reduce the lifespan of my components?
Thanks
CPu i3 4330

 

[smorizio]

no it wont. most of the older ddr-3 1600 ram used to be 1.65 ram. the newer 1866 and faster ram is 1.65v ram. intel gave the 1.5v spec as the non over clock spec.

 

[photonboy]

Each motherboard varies in what Voltage is supported for the memory modules.

The memory modules also vary in the Voltage at the same frequency. There are 2133MHz modules that only use 1.5V and some that use 1.65V. The ones that use 1.65V would probably default to the highest frequency that works at 1.5Volts for your RAM.

I do NOT know if you can overvolt the RAM. I guess if there's an OPTION for it in the motherboard then it's supported. So I don't think it's "bad" otherwise why would the BIOS have a setting for that voltage?

So, again the memory may be listed as "1.65V" but it will have frequencies that work at 1.5Volts.

Do THIS:
1) Update the motherboard BIOS

2) Enter the BIOS and click "XMP" to change to the optimal RAM and CPU settings

3) Then run MEMTEST to verify memory stability.

4) If it passes, AND your memory is below it's maximum frequency (i.e. 1600MHz, not 2133MHz) you can try manually increasing the frequency, though you may have to manually change some timings. If there's an overvolt option you may need to apply that as well.

I'm not familiar with your motherboard BIOS so I'm not sure what's offered.

Other:
- when overclocking the CPU, your memory settings might change on you so fix that
- always run MEMTEST then a CPU test within Windows (I use Prime95, others said there's better) ANY TIME you change the CPU or MEMORY settings. (memory for a full pass, CPU for at least 10 minutes)

 

[Yingda Wang]

SCrew it, Too complicated. researched like 3 days and still cant decide.
Guess ill just spend 10$ more for a 1.5v g.skill

 

[photonboy]

Is THIS your motherboard? http://www.gigabyte.com/products/product-page.aspx?pid=4481#ov

If so, the Manual does say 1.5Volts but it also only says 1333/1600MHz. That disagrees from the main page which states up to 3000MHz memory (overclocked).

There is NO memory with frequency that high that works at 1.5Volts, and by the quality and age of the board I believe the 3000MHz spec.

Thus, I'm pretty certain your board supports 1.65Volts. In fact, provided the BIOS is up to date it should likely default to the correct frequency, timings and voltage when you click "XMP".

 

[Bonecrushrr]

I have that motherboard. The board supports 1333/1600mhz as stock speed and voltage.

That board also claims support for DDR3 3000(O.C.) / 2933(O.C.) / 2800(O.C.) / 2666(O.C.) / 2600(O.C.) / 2500(O.C.) / 2400(O.C.) / 2200(O.C.) / 2133(O.C.) / 2000(O.C.) / 1866(O.C.) / 1800(O.C.) however these are all overclocked memory speeds. Currently no CPU in this socket exists that natively runs these memory speeds without overclocking the memory controller on the CPU.

Your board and CPU should handle 1.65 volt memory just fine. 1.65 volt memory is generally either 1 of to things faster or lower quality and needs the extra voltage to stabilize the chips.

 

[photonboy]

I have that motherboard. The board supports 1333/1600mhz as stock speed and voltage.

That board also claims support for DDR3 3000(O.C.) / 2933(O.C.) / 2800(O.C.) / 2666(O.C.) / 2600(O.C.) / 2500(O.C.) / 2400(O.C.) / 2200(O.C.) / 2133(O.C.) / 2000(O.C.) / 1866(O.C.) / 1800(O.C.) however these are all overclocked memory speeds. Currently no CPU in this socket exists that natively runs these memory speeds without overclocking the memory controller on the CPU.

Your board and CPU should handle 1.65 volt memory just fine. 1.65 volt memory is generally either 1 of to things faster or lower quality and needs the extra voltage to stabilize the chips.

You are correct that it should be no problem (otherwise why list RAM of high frequencies), however many motherboards have memory controllers which can get used INSTEAD of the CPU version.

I know the main part of the CPU has nothing to do with this voltage because you can monitor CPU voltage in CPU-Z and it varies to save power (can drop below 1V).

I tried to fined EXACT info on this but gave up. What I do know, is I clicked "XMP" in the BIOS and everything just sorted itself out but the CPU and DDR3 RAM voltages where completely separate.