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Memory detected at wrong speed

Last response: in Memory
May 16, 2012 3:25:32 PM

Just put together my first home build. Everything went well. But, my memory is listed as 1600MHz in BIOS but it is DDR3-2133 memory. If I just change it in BIOS, whats the worst that could happen? The voltage was already correct 1.65V, I dont remember the timing, but I'd check that and change if necessary too.

Asus Rampage IV Formula X79
GSkill F3-17000CL9Q-16GBZH
May 16, 2012 3:28:43 PM

1600MHz is the highest ivy bridge ram will run without being overclocked.
a b } Memory
May 16, 2012 3:28:53 PM

The timing, speed and voltage of your ram is listed on a sticker on the dimm.

If your mobo supports 2133, then you just manually set it to 2133, not you may need to manually set the timings and voltage too.
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a b } Memory
May 16, 2012 3:41:23 PM

SB spec is 1333, So ddr3 . 1333 would initially come up at the default spec of 1333.
Same with IB except spec is 1600 so any Ram >1600 would initally load at 1600.

When using ram > than the spec, in both IV and SB. the simple solution is to go into Bios and select XMP, Profile 1 which will then load the settings that are stored in the Ram Module (manufs specs).

NOTE: With SB if you run ram that is over the Spec (1333 for SB) you void the warranty (suspect the same will be true with IB). With SB you can buy a OC warrantee (ie $25 for i5-2500k) that gives you a FREE pass if you "blow" your CPU`
Whats covered bassicly (with SB) is:
1) exceeding max Vcore of 1.5 V (Not sure, But does run hotter at voltages used for SB)
2) Exceeding max Memory Voltage of 1.575 V (probably the same for IB)
3) Running your Ram > 1333 (1600 for IB)

Added: side Commnet - DON'T forget, Run Memtest 86 from a Bootable CD BEFOE: Updating Bios, Loading your Operating system, and If SSD, before updating firmware of SSD!!!!
a b } Memory
May 16, 2012 4:43:09 PM

On a side note, we've had a couple Sandy Bridge cpu's that were overclocked and running ram higher than 1333 and Intel never questioned replacing them under warranty.
a b } Memory
May 16, 2012 4:48:08 PM

^ Probably depends on the Intel person on the other end, and That you will never know untill to have to call. But it does not change intels policy.
May 16, 2012 4:52:06 PM

Load the XMP Profile in Bios, sit back and enjoy that outrageously fast ram.
a b } Memory
May 16, 2012 5:01:18 PM

^ LOL, and there is a "big" diff between 1333 ram and 1600 ram w/i5-2500k. Last I heard they were so close in performance that the diff only showed up in benchmarks.

FWT, I use 16 Gigs DDR3-1600 CL7, 1.60 V with My i5-2500k
a b } Memory
May 16, 2012 7:50:11 PM

Anything over 1600 is a waste.
May 16, 2012 9:22:28 PM

Best answer selected by Serkazong.
May 16, 2012 9:22:59 PM

geekapproved said:
Anything over 1600 is a waste.

a c 146 } Memory
May 17, 2012 9:28:51 AM

This topic has been closed by Nikorr