Question on Corsair 2000Mhz C8?

[russchadd]

Hi

I am a bit of a newby when it comes to overclocking and tweaking and i was wondering if anyone knew how i would tighten up the memory on my new Corsair 2000Mhz (8 9 8 24) ?
The max i can run this memory is at 1600Mhz @ 1.65v

Any help would be really appreciated!

 

[momo56]

yhh got the same set as you, not a big fan of them to be honest. Getting the ram to 2000mhz involves raising the vcore voltage to dangerous levels that can damage/shorten lifespan of the cpu.

Sneaky marketing in my opinion. Try enabling the xmp profile in the bios although don't get your hopes up.

 

[yashiro]

http://www.anandtech.com/show/2792/13

 

[1Day]

I think it is often just luck of the draw when it comes to CPU. I put that same set into my UD7 motherboard and enabled the XMP and bamm done deal. Rock solid. I say CPU because it is the CPU that determines who the memory is going to be run. Remember the IMC is no on-die with the CPU not on the NB like it used to be before.

 

[momo56]

Yeahh makes sense considering my 920 is quite a bad clocker. If only I knew before hand.

 

[Marvin]

To be fair it also depends on what the OP is using. If it's AMD based (Phenom II 955 for instance), there's no chance will it get to 2000MHz. Had some G.Skill 2000MHz RAM - couldn't get it stable on a Phenom II 955.

Also, no overclock is guaranteed, and as said, it's probably your CPU holding you back.

 

[yashiro]

The 920 is a good clocker. The problem is just a matter of the multipliers.
After around 180 BCLK with the 920 you can run into problems with the QPI/Uncore clocks. You can still clock a fair bit higher but only if you drop the Mem Multi.

If you've got a 920 something like 1600C7 is enough unless you really crank it up and go mad on the cooling.

 

[Yellowbeard]

yhh got the same set as you, not a big fan of them to be honest. Getting the ram to 2000mhz involves raising the vcore voltage to dangerous levels that can damage/shorten lifespan of the cpu.

Sneaky marketing in my opinion. Try enabling the xmp profile in the bios although don't get your hopes up.

How is it sneaky marketing? Your statement above makes no sense at all.

 

[yashiro]

He means you need to overclock the rest of your system to reach the rated speed of your ram. On an overclocking site I don't see a problem but in general it's a bit iffy.

 

[Yellowbeard]

He means you need to overclock the rest of your system to reach the rated speed of your ram. On an overclocking site I don't see a problem but in general it's a bit iffy.

Why don't we let the quoted person try to explain what it is that he's trying to say. We do not engage in sneaky marketing. And, if you'll read what I quoted, it's entirely inaccurate for a variety of reasons.

 

[momo56]

Why don't we let the quoted person try to explain what it is that he's trying to say. We do not engage in sneaky marketing. And, if you'll read what I quoted, it's entirely inaccurate for a variety of reasons.

What I meant is that when I buy '2000mhz' ram I expect it to run at 2ghz.
Not "might go to 2ghz if your cpu is from a decent batch and have an exceptional IMC, your mobo is a good clocker and you're willing to risk the life span of your cpu by raising the qpi/ dram voltage to silly levels above the intel spec."

I've had 2 sets of this the 2000mz dominator c8. Considering the xmp setting the qpi is 1.25v, i find it unacceptable I have to set it to 1.45 v in order for the system to be stable especially since intels spec is 1.375v. Qpi at 4ghz is 1.55 and 1.6 at 4.2 which is pretty much suicide for the cpu.

Corsair advertised this at 2000mhz ram when in fact it isnt. Im stuck with ram at 1600mhz at c7. Compared to the 1600mhz dominator that you do sell I paid an extra £60 for some red heatsinks and hours of hassle :S/

 

[Yellowbeard]

I think you should keep in mind that there are NEVER any guarantees in OCing. We do in fact guarantee that our modules will meet their specification but we have absolutely no control over the other components in your system.

The modules do what they were designed and advertised to do. To refer to us as being sneaky is uncalled for. If you have made a poor or uninformed choice in memory frequency that is not a good fit for your needs, we cannot be held responsible for that. However, we are more than happy to help you try to properly tune your system.

FYI, the 1.25v in the XMP setting for QPI/VTT is for Gulftown CPUs. If you have a Bloomfield CPU you can safely go higher than that. But, in ANY OCing venture, the end user has to accept any risks involved with raising voltages above the manufacturers specifications.

 

[w3bbo]

You should check that your motherboard is capable of running memory at its rated speed (it will be part of the specification). a lot of i7 motherboards only rate their boards upto 1600mhz though in practice they go a lot higher.

Corsair cannot reasonably test the memory with every different, individual cpu. If your cpu has a poor IMC then surely that is Intels problem, not Corsairs? The fact that you have to compensate a poor IMC by adding excess voltage, is down to you, your settings, your motherboard or indeed Intel. Corsair cannot be held responsible for poor CPUs.

Corsair can only rate it's own product, if you don't have the equipment to run the product at it's rated speed then that is hardly their fault now is it?

My OCZ blades run at C7 2000MHz and they too need high QPI, as do most 2000MHz kits I have come across be it Corsair, Kingston, OCZ, Mushkin due to the frequencies involved and the IC's used. I'm not saying running a high QPI is harmless to your cpu but mine has been running at 1.5 for nigh on 2 years now (sometimes higher as it is the same one I used for my reviews) with no issues encountered.

In short the Corsair kit advertises a rated speed at a rated voltage, it does exactly what it says on the tin. This is of course assuming you have the correct hardware to compliment such high end memory kits.