Sign-in / Sign-up
Your question
Solved

A question about ram voltage

Tags:
  • RAM
  • Memory
Last response: in Memory
November 22, 2013 1:03:59 PM

I am buildjng a pc for the first time but have a question when I was looking for ram I notices that they come in different voltages I noticed that a lot came in 1.5 but some also come in 1.85 what's ths difference and how do I know which to buy?

More about : question ram voltage

a b } Memory
November 22, 2013 1:12:12 PM

You want RAM that can run their speeds at 1.5V, RAM that run stock at 1.85V are essentially OC'd to their breaking point
m
0
l

Best solution

a c 204 } Memory
November 22, 2013 1:21:55 PM

The lower the voltage at the same speed the higher quality the RAM is.

Kingston still sells DDR3 1600 cas 9 that requires 1.65v to reach that speed. Those are very low quality compared to literally every other company that has moved to 1.5v DDR3 1600 cas 9. AMD processors are less sensitive to RAM voltage than Intel processors so the Kingston is aimed at AMD users.

With Sandy Bridge ( ix 2xxx ) chips and Ivy Bridge ( ix 3xxx ) you want to use 1.5v RAM. The memory controller is on the CPU so when you use higher voltage RAM you are actually overclocking part of the CPU. Haswell ( ix 4xxx ) can use higher voltage stuff ( 1.6-1.65v )more safely. The higher voltages are needed for very high speed DDR3 2133 and up.

AMD is fine with 1.5v - 1.65v. Anything over 1.65v is ancient first generation DDR3 and not safe for any modern processor. When DDR3 first came out it was not uncommon for 1.75-1.85v DDR3 800 and 1066 to be seen because the manufacturing process was not as mature.

Share
a c 5047 } Memory
November 22, 2013 5:08:58 PM

anort3 said:
The lower the voltage at the same speed the higher quality the RAM is.

Kingston still sells DDR3 1600 cas 9 that requires 1.65v to reach that speed. Those are very low quality compared to literally every other company that has moved to 1.5v DDR3 1600 cas 9. AMD processors are less sensitive to RAM voltage than Intel processors so the Kingston is aimed at AMD users.

With Sandy Bridge ( ix 2xxx ) chips and Ivy Bridge ( ix 3xxx ) you want to use 1.5v RAM. The memory controller is on the CPU so when you use higher voltage RAM you are actually overclocking part of the CPU. Haswell ( ix 4xxx ) can use higher voltage stuff ( 1.6-1.65v )more safely. The higher voltages are needed for very high speed DDR3 2133 and up.

AMD is fine with 1.5v - 1.65v. Anything over 1.65v is ancient first generation DDR3 and not safe for any modern processor. When DDR3 first came out it was not uncommon for 1.75-1.85v DDR3 800 and 1066 to be seen because the manufacturing process was not as mature.


__________________________

+1

In short 1866 and under - use 1.5, 2133 and above 1.6 to 1.65 is fine - nothing EVER over 1.65 for DDR3
m
0
l