Corsair XMS3 fails @2000mhz - Asrock Extreme4

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inzone
I'm thinking that you'll have to overclock the CPU a bit and by a bit I mean to go from 3.4ghz to 3.8ghz which will require only a multiplier change or BCLK change and no voltage needs to be added. That CPU is capable of that clock increase without adding voltage, plus if you do the BCLK increase you'll be raising the ram MHz anyways.

Here's what you can do to try;
You have said that the ram will run at 1866mhz so set it at that, then the BCLK is currently at 100 so take and increase that to 101, it's only one step and once you do that look at the ram speed and see if it changed from the 1866. If it did then you can now save and restart to see if it will now run at the MHz that it showed.
Now if it's able to now run at above the...
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silverliquicity

silverliquicity

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I had kingston hyperx ddr2 that was stated to run at 800mhz, but when i got it, it only ran at 667mhz, i looked around and found that a slight voltage increase was needed to get the advertised speed, im not sure if it would be the same for you, but if you havnt tried that maybe give it a go :)
 
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inzone

inzone

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Then there is something wrong in the bios if the XMP Profile is not staying set and is resetting the ram to 1066mhz. What happens when you set the frequency of the ram manualy. If instead of the auto setting in the frequency you choose 1866mhz and hit enter to set your selection and then save and exit.
 
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Kasraa

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Well I'm currently running them at 1866 (manually), that's all I can get.
But there is no way I can get them to work @2000mhz, manually or using the Profile. It reset's.

What could be wrong in BIOS?
Also cleared the CMOS hundreds of times.
 
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giltyler

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Read this link on MEM testing http://api.viglink.com/api/click?format=go&key=7777bc3c17029328d03146e0ed767841&loc=http%3A%2F%2Fwww.overclock.net%2Ft%2F1254500%2Fi5-3570k-asus-z77-pro-memory-advice-needed&v=1&libid=1366719797202&out=http%3A%2F%2Fwww.anandtech.com%2Fshow%2F4503%2Fsandy-bridge-memory-scaling-choosing-the-best-ddr3%2F6&ref=http%3A%2F%2Fwww.bing.com%2Fsearch%3Fq%3Di5%2B3570k%2Bmax%2Bram%2Bspeed%26form%3DMSNH14%26pq%3Di5%2B3570k%2Bmax%2Bram%2Bspeed%26sc%3D0-13%26sp%3D-1%26qs%3Dn%26sk%3D%26ghc%3Dnull&title=I5%203570K%20%26%20Asus%20Z77%20Pro%2C%20Memory%20advice%20needed!&txt=http%3A%2F%2Fwww.anandtech.com%2Fshow%2F4503%2Fsandy-bridge-memory-scaling-choosing-the-best-ddr3%2F6&jsonp=vglnk_jsonp_13667200222035
 
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inzone

inzone

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I'm thinking that the article that's linked is showing that even if you get the ram to work at 2000mhz it's not going to make much of a difference in gaming performance. That may be true in benchmarks but in real world applications running ram at higher frequencies does seem to make the computer feel quicker.
Here's the thing with ram and motherboards, if you look at the spec's of the board and the ram in particular you'll see what the board supports for ram speed. The boards will generally support 1066,1333,1600 and 1866 at normal rated speeds and then will support 2133,2400 and 2800+ at overclocked speeds. So in this case you may have to overclock the CPU by raising the BCLK, try setting the ram at 1866 and the raising the BCLK one number at a time to see if it can be stable at other speeds. The default BCLK setting is 100 so if you set it to 101 it should not only raise the CPU speed but the ram speed as well. At some point you may need to add voltage to the ram but not right away.
Because the motherboard will support ram at it's rated speed of 1866mhz without overclocking that means that it supports it at the BCLK of 100 and to have the ram work at a higher rated speed that BCLK needs to be raised. Also because raising the BCLK will raise the CPU if you don't want to go high with the CPU you can set the multiplier lower. None of these changes will damage anything and if it doesn't work you can always reset to default.

 
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Kasraa

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I knew about the BCLK but I've heard it'll change not only CPU and RAM frequencies but even the PCI and PCI-E clocks. I don't want any of that to be overclocked, specially GPU.
Well I paid alot more for this over Vengeance to work at 2000mhz or above. There should be a solution, even if it's not making any big differences I want them to work at their advertised speed, as I already said that's what I paid for :(
 
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inzone

inzone

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Have you tried the Corsair forum ? For the most part I buy Corsair ram and when there is an issue I go to the Corsair forum since that's all that is dealt with there is people with Corsair ram.

There is one thing that you have to consider and that is just because you buy a particular model of ram doesn't mean it's going to work in your computer without making changes. When you look at the details of the motherboard and in the memory you see 2133(oc), 2400(oc) this means that the board will support those memory speeds but in an overclocked state.
When you look at the CPU and the memory controller that it has, it will tell you what memory speed it will support. The third generation of Intel CPU (Ivy Bridge) will support memory at 1600mhz and the higher speeds by overclocking.
To get your 2000mhz ram to work properly on your motherboard you will have to overclock the CPU. Since you have the i5-3570k which is an unlocked processor all you have to do is change the multiplier to raise the clock speed. This will not change the BCLK or the buss speed or affect the Pci-e slots. You also won't have to raise the clock speed much at all , just enough to have the CPU support the 2000mhz ram.
 
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inzone

inzone

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An overclock of .05 will not harm anything and may allow the ram to work, the North Bridge is what controls things directly from the CPU to the Motherboard. It has control over the memory slots as well as the Pci-e slots. Keep in mind the each part has it's own set of adjustments so by adding voltage to the North Bridge you do not affect the Pci-e slots or the memory slots it just affects how the N.B. operates. By giving it a bit more power it may allow it to work with the higher ram speeds. Most of he time the bios will say what the limit is on a particular part so for example the AN.B. may be running on 1.5v and when you go to adjust the voltage it will say max volt limit 2.0v so .05v is a very small adjustment.
 
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Kasraa

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OK which value exactly should I adjust? I can't find the NB Voltage.

Speaking of heat, I could feel the South Bridge heatsink is very very hot from the first day. I know it may be not related to this subject but I always wondered why is it so hot and if it's not a good sign...
 
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inzone

inzone

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Do have the option of a fan in the side panel of your case? It would help cool the South Bridge some, but the purpose of a heat sink is to draw the heat away from the chip so if the heat sink is warm then it's doing it's job and extra fan air will help the cooling even more.
 
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Kasraa

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I know but it's not just warm, It's so hot that can actually burn my finger.
I assume that the chip is much hotter, which is not normal right?
 
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inzone

inzone

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I will have to say that I'm not sure that the heat sink being that hot is a normal thing, I know that the chip will get very hot and you can burn your finger by touching it. I would try to arrange it so that a fan will blow directly onto it to help cool it down some.
 
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Kasraa

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I had to remove the 24mm side fan for installing the CPU cooler :(
I'll see what I can do.

Well I don't know they could use a bigger heatsink for S.B, maybe that would reduce the heat.
 
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