Corsair 2x2gb + 2x2gb on Asus Sabertooth x79

SGasan116 · Jan 20, 2014

Hello!

I had a Corsair 2x2gb modules on Asus Sabertooth x79 and added another 2x2gb modules. Now in Bios and from HWinfo64 it seems like these two pairs running with different speed.

Module Part Number: CM3X2G1600C9DHX - 533.3 mhz (PC3-8500) in rows 0 and 8

and:

Module Part Number: CMP4GX3M2A1600C8 - 800mhz (PC3-12800) in rows 4 and 12

Is there any way or tricks to make them run at the same, 800mhz speed?
I mean to bring both pairs to 1600mhz.

Thank you, Stan

alexoiu · Jan 20, 2014

Hi, Is the XMP enabled in BIOS? If yes, then I suggest clearing firstly the CMOS (unplug the power cord an use the jumper), and check the values in CPU-Z. Use the A1, B1 A2, B2 slots.

spentshells · Jan 20, 2014

You have two very different speeds of ram It is very doubtful you could overclock the slower ram to the higher rated speed. A 50% overclock on ram is generally a dream. It looks like all the ram will run at the slower 1066MHz DDR or 533MHz actual.

SGasan116 · Jan 20, 2014

alexoiu :

Yes, XMP is enabled, and I tried CPU-Z and reset, but still no luck.

SGasan116 · Jan 20, 2014

spentshells :

Should I make both pair run at 1066mhz or it's fine now, with two different speeds?

spentshells · Jan 20, 2014

SGasan116 :

it actually will downclock to the lower speed so just leave it.

spentshells · Jan 20, 2014

SGasan116 :

it actually will downclock to the lower speed so just leave it.

alexoiu · Jan 20, 2014

Have you tried clearing the CMOS and checking the RAM's speed again? Can you post a picture with the board and the installed RAMs?

SGasan116 · Jan 20, 2014

alexoiu :

I installed memory modules according Asus Sabertooth X79 manual - A1 - B1 - C1 - D1, to run them in quadro.

SGasan116 · Jan 20, 2014

alexoiu :

No, I didn't tried, b/c it difficult to reach. It's located under videocard, and may be I'll try later.

alexoiu · Jan 20, 2014

Install one kit in A1, B1 and the other kit in A2, B2.
Clear the CMOS and check teh settings. Then enable XMP and check again.

SGasan116 · Jan 20, 2014

alexoiu :

not today, b/c I need to go. But it's regular board and ther is a picture:

http://www.xbitlabs.com/picture/?src=/images/mainboards/asus-sabertooth-x79/board_big.jpg

I put memory (from the left to right) in A1 - B1 - D1 - C1 slots, and in A1 and C1 - 1033mhz, and B1 and D1 - 1600mhz, if I remeber correctrly.

SGasan116 · Jan 20, 2014

alexoiu :

a1b1a2b2 not recommended by manual. should I try it anyway?

alexoiu · Jan 20, 2014

Yes, try it. But firstly, if you leave only the Corsair kit installed in A1 B1 (power off when reseating the RAMs), are you still getting 1066 MHz? What if moving them to C1, D1?

SGasan116 · Jan 20, 2014

I'll try it later today, and let you know.

SGasan116 · Jan 20, 2014

alexoiu :

But manual to 1066 says it should easily run at 1600mhz, so what could be a problem?

alexoiu · Jan 20, 2014

Hard to say without testing.

Tradesman1 · Jan 20, 2014

It sounds like you are looking at the SPD tab of CPU-Z - look in the memory tab - that will show what they are running at in the Frequency Window - if set correctly all should be at 800, which is the true freq as all of these at 1600 sticks - it's DDR (DOUBLE data rate) so you take the true freq times 2 (800 x 2 = 1600 effctive).....it will also show the timings the DRAM is running at (hopefully like 9-9-9-27 or so) - check that and let us know what it shows - all the above talking the sticks are 'running' at different freqs is simply wrong - the DRAM all runs at the same freq

SGasan116 · Jan 20, 2014

Is there any way I can attach or insert an image from CPU-Z?

SGasan116 · Jan 20, 2014

Tradesman1 :

I got it:

Tradesman1 · Jan 20, 2014

Looking good, you're running 1600, as I guessed and at even better timings with the 9-9-9-24 and 1T is great was sort of expecting 2T - so you are good to go - have fun !

SGasan116 · Jan 20, 2014

but if I change slot in the upper left corner it give me different readings. why is that?

SGasan116 · Jan 20, 2014

slot 1:

slot 3:

slot 5:

slot 7:

Tradesman1 · Jan 20, 2014

You're back to the SPD tab, that simply reads info from the SPD - has nothing to do w/ what you are running at, the different info can be due to different versions of sticks and when they were manufactured

SGasan116 · Jan 20, 2014

Does it means that all 4 sticks run at 800 mhz?
But why in BIOS it says 1066 and 1600mhz?

Corsair 2x2gb + 2x2gb on Asus Sabertooth x79

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