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ryanbatcund

Ram installed but won't boot into Win with XMP

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So I got the RAM I wrote about in the other thread...  

 

For reference it is this ram:

http://www.corsair.com/en-us/vengeance-pro-series-16gb-2-x-8gb-ddr3-dram-2133mhz-c11-memory-kit-cmy16gx3m2a2133c11r

 

My last RAM was corsair vengeance as well, but it was 2x 4 GB 1866mhz.  With that RAM I was able to run XMP Profile1 in my bios, and the bios set the correct spd of 1866.  When I set XMP profile1 with this new RAM it sets it to 2000 mhz (the correct speed is 2133).  The mobo manual says 2133 works.  Anyway if I set Profile1 it WILL POST, but not boot into Win.  My CPU multi is 40x as its always been (a very mild OC - it's never worked much higher).  Anyway, what I am able to do is set 1866 manually and it boots fine and all is normal.  

 

So, is the 2133 mhz just a rated speed at stock CPU timings?  Or is my board not really able to support 2133 mhz (even though it says?).  Or could something else be wrong?

 

P.S my board is this:

http://www.gigabyte.com/products/product-page.aspx?pid=3759#ov

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Been a while since dealing with this myself with a gigabyte board hence my switch to asus but I think its the bios itself always found gigabyte bios wonky and hard to deal with - just never does what it is suppose to do - no help sorry but thats why I gave up on them - I think tech support told me even though it was saying 2000mhz it was really the expected speed such as 2133 you mention - done with that will never buy a gigabyte again

 

If I remember correctly you could do it manually to force it and not use xmp1 - but not sure - that is what I would try

 

You want to figure it out - here is where you will find your answer my go to site for such problems - amazing help here - highly recommended

 

 

http://www.overclock.net/f/

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Yeah so far it seems to work at 1866 - I'll try 2133 manual set later on, I've got to work the mid tonite ick!

 

My next board will be Asus as well.  I started DIY builds on ASUS then left - someday I'll get back!

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Yeah so far it seems to work at 1866 - I'll try 2133 manual set later on, I've got to work the mid tonite ick!

 

My next board will be Asus as well.  I started DIY builds on ASUS then left - someday I'll get back!

 

Good luck but def go to that forum - amazing - learned a ton there and from Rob on my custom pc build

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Yes I went there and searched ram running at 2000 mhz.  Seems it's common on sandy bridge to be stuck at 1866.  They say you can lower your BLCK but I really don't think 1866 vs 2133 is going to matter on my "ancient" SB system.

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Yes I went there and searched ram running at 2000 mhz.  Seems it's common on sandy bridge to be stuck at 1866.  They say you can lower your BLCK but I really don't think 1866 vs 2133 is going to matter on my "ancient" SB system.

 

Exactly - thats what I did gave up on it as I think it was not worth the bang for the buck anyway - I think I got it to work somehow but pc did not run correctly so I left it alone - on ASUS you just set XMP1 and it works - very nice

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XMP1 did work with my other vengeance - the 1866 mhz stuff.  But it was only 8GB.  I upgraded to 16 so BF1 plays smoother - and now it does.  It doesn't really help anything else - maybe XP10, but that's about it.

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Anyway if I set Profile1 it WILL POST,

 

What about Profile 2?

 

gb.

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Not available

 

Anywho- I found the same model ram I bought on 2011, in 2x8 GB format - off Amazon

 

I'll return the stuff I have and use that - hopefully xmp1 will work on that stuff

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I've looked into flashing it to the latest but after reading that people with the newest bios are still having issues I decided against it

 

I'm not sure of the risk these days to flashing to a newer bios either - it's my only real PC and CMOS reset doesn't seem to work right anymore.

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So many issues, including overclocking issues, [and of course the XMP profile is a form of overclocking] are addressed with BIOS updates. If you spoke to your motherboard manufacturer the first thing they would say to you is "have you installed the latest bios".

 

Years ago flashing the BIOS was more risky, these days it's a relatively safe practice.

 

The first thing I would do in your place is install the latest BIOS. I would also set the BIOS to optimised defaults, no overclocking, no XMP profile. Then run a stress test, RealBench for example, to  ensure that I had a stable system at stock frequencies.

 

As memory controllers are not all created equally, I would decide what was the priority for me, memory frequency or CPU frequency. If it's the memory, then I would set the XMP profile "only" and test. If it's stable overclock the CPU and see how high I could go.

 

If the priority is CPU frequency, I would overclock the CPU with stock memory frequency and timings, just the JADEC settings. Once the CPU is stable, I would see if the XMP profile works, if not  I would work up from the stock memory frequency and timings.

 

I'm not an expert, but that would be my approach. 

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When I originally purchase it was up to date and those were my methods.

 

The only difference between now and then is adding the ram

 

But I will attempt it

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2133 shall work but the 2500k have normaly a weaker memcontroller than a 2700k

Think Its no problem with the gigaboard if a remember right a have run 2300mhz on a gigabyte board with a 2700k 2133 set in bios and bclk 110, the higest bclk on that board with the 2700k was 116 2475mhz on mems.

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Your motherboard uses the P67 chipset, which was brought out to support the Sandybridge cpu.  Early versions of this chipset had some issues and were updated by intel. 
Although it supports up to 32Gb memory and up to 2133 speed, it won't necessarily do both at the same time. This would also apply to using16 Gb memory, which was not very common practice at the time this chipset was produced.

 

Various posts at the time indicated that the sweet spot for the best memory speed was 1866. This applied whatever brand of motherboard was being used.
 
Regarding the overclock capability of your cpu, it's worth a look at this TechPowerup review of your motherboard -  https://www.techpowerup.com/reviews/Gigabyte/P67A-UD4/

 

Note that it required higher than expected cpu voltage, but was then able to achieve a good overclock. This was a feature of the motherboard, not the cpu they were using.

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Sure ok thanks

 

I did get the bios flashed to the latest.

 

I have reset my bios settings, and then changed them back to what I had before the new ram (except left the ram spd at 1333).  It passed the test on ROG software but I'm concerned my temps are a bit high.  around 80C for all cores...  I think it just may be my cooler showing its age.  Under load when I first had it OCed temps were only low 70's.

 

I will bring the RAM up by 1 notch at a time to 2133 (but I'm pretty sure it won't post).  I was reading the corsair site about the specific RAM I bought.  It says compatible with 3rd and 4th gen Intel CPU.  If I recall mine is 2nd gen...  so really this RAM might not be compatible, esepcially at the high speed.

 

One question though.  When the manufacturer lists the SPD Speed as 1333, but then says SPD rating 2133 MHz, why do they write it that way?  I thought SPD was just what it's rated at.

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Sure ok thanks

 

I did get the bios flashed to the latest.

 

Ooops forgot about that - you nailed it Ryan 

 

Honestly you wont see much of a difference anyway and if you bought ram thinking it would you would be dissapointed - long story short you need a newer motherboard and cpu to go along with that ram

 

====================================================================

 

Here is the answer in a nut shell:

 

The CPU can only access the memory at the speed it was designed to do so at. The memory can only be access as quickly as it was designed. If you use faster memory then the CPU supoprts the speed is limited by the CPU. You gain nothing by putting memory faster then can be supported by the motherboard, infact, past a certain point the memory might not even result in a POST

 

And here:

 

The RAM will be downclocked to match the FSB/Memory controller speeds. In this case that’d be 1600Mhz. So buying the faster rated memory is a waste of money unless you plan to change the CPU soon enough.

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Yeah I've gathered that as well

 

Good thing is I have Prime so I've already got the new "old" RAM coming tomorrow - it will save me 35 bucks when I return the 2133 mhz stuff

 

Hopefully it will work being 16 GB and all

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Yeah I've gathered that as well

 

Good thing is I have Prime so I've already got the new "old" RAM coming tomorrow - it will save me 35 bucks when I return the 2133 mhz stuff

 

Hopefully it will work being 16 GB and all

 

Yes that sounds like a plan until you can upgrade mb - ram & cpu - only way to do it right  :wink:

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You will find plenty of people running faster RAM with the 2500K than 1600 if you do a google search. If your MB manafacturer says you can (and they do) then its possible. As I said though, not all memory controllers are created equally. The silicone lottery is at work here too. I do agree with Richard though, it won't blow your mind.

 

Your issue could well be related to filling all 4 memory slots, which often compromises max CPU and memory overclocking.

 

Two 4GB or two 8GB sticks could well result in higher CPU and/or RAM overclocking than attempting to fill all 4 slots.

 

Even now, with my Skylake rig I fill two slots as a priority over 4.

The bottom line is that anything over the stock frequency and JEDEC timings is overclocking and thus subject to the silicone lottery.

 

In my 3770K rig that my son now has, I can run a higher CPU overclock but at lower than the Corsair Dominator RAM is rated at. Or the XMP profile but a lower CPU overclock. Very tricky if I try to do both.

 

My Skylake rig on the other hand runs at a high overclock plus the XMP setting for the RAM. The silicone lottery doesn't just apply to CPU's.

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You will find plenty of people running faster RAM with the 2500K than 1600 if you do a google search. If your MB manafacturer says you can (and they do) then its possible. As I said though, not all memory controllers are created equally. The silicone lottery is at work here too. I do agree 

 

Well said  :wink:

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I got the older vengeance from Amazon today

 

Profile1 is stable but it's running them at 1600 instead of 1866. So maybe I'll play around or maybe I'll just be content hehe.

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So here's another update.

 

Got the new corsair 2x8 GB sticks.  XMP1 works again but it only sets 1600 mhz.  With what I've learned that just fine.

 

However, and I swear my wife brought this up, but she thought it would be better if I just return the RAM and we'll budget for a new PC Q1 of 2017!  Woooo!  That sounds like a good idea to me!

 

It likely won't be a new new PC, but at least new mobo, ram and cpu.

 

oh, and the heating issue.  Friend came over yesterday because he had some AS5 left over (mine's all bad) and we repplied thermal paste.  Helped enough to make a difference.  Temps are still a bit warm when I use Battlefield but that's ok I think.  I'm guessing the system/cooler/whatever is just showing its age.

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So here's another update.

 

Got the new corsair 2x8 GB sticks.  XMP1 works again but it only sets 1600 mhz.  With what I've learned that just fine.

 

Yupper sounds like a new build will be a nicer choice - smart wife  :wink:  ASUS this time  :wink:

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