1600mhz RAM running at 1333mhz

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Jayzied

Jayzied

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Hi guys, although I've looked at this forum few months ago, this is my first post here; for advance, I want to give thanks to everyone who helped someone in this forum, because this helps has been useful for me also in many times when I had problems with my computer :D

Well, the problem is that: I bought a new RAM DIMM, 8GB, 1600mhz (the model is this: http://www.kingston.com/datasheets/KHX1600C10D3B1K2_16G.pdf). I have also an ASUS P8M75-M LX PLUS mobo, which can manage this 1600mhz. I'm also mounting an i5 3330 (non K), so there wouldn't have be any problem at the time to OC this DIMM to 1600mhz.

However, at the time I try to configure it in the BIOS, seems to be working fine, yet when I test in on CPU-Z, this module is only working at 1333mhz. I've also tried to put on the profile 1 on X.M.P., yet it doesn't seem to work.

What could I do? I've to update my mobo BIOS (it's the second one after its release), it could be the solution? Because I was searching in compatibility list of this mobo, and my DIMM module doesn't appear.

Thanks! :D
 
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jitpublisher

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You aren't running in dual channel mode with only 1 stick, you need 2 identical sticks. The speed increase going from from 1333mhz to 1600mhz is not noticeable at all. The dual channel mode operation would actually get you more performance than increasing your RAM speed, but it is also a very small amount. This could also be something why the xmp profile is not working, as usually RAM is installed in banks of 2, not in single sticks.
 
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Tradesman1

Tradesman1

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Where does CPU-Z say it's running at 1333, in the SPD tab? If so check the Memory tab, under freq it will list 667 or so, if it shows 800 then you are at 1600...CPU-Z shows true freq and this is DDR (DOUBLE data rate) so it's 800 x 2 = 1600 effective or 667 x 2 = 1334 (3) effective. If at 1333, set freq to 1600, timings per the stick specs, CR (2T or 2N) manually and try DRAM voltage at 1.55, then check CPU-Z Memory tab again
 
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Jayzied

Jayzied

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Thanks to everyone who has replied me. In resume, yes, I only have one DIMM actually in my computer, that's supposed to be the principal problem? I'm still a n00b in OC, so I think I'm not able to change manually all these parameters, because I can't localize them into the BIOS, furthermore that I'm not sure what of these have to be changed.

Tradesman1, CPU-Z brings me a screen where appears a frequency of 667, single one, because I don't have two DIMMs.

PD: Sorry for my poor English and my unknowledge about OC, also, I'm still learning both of them u.u
 
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Jayzied

Jayzied

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Thanks dude, my research about the OC has not been enough, and I don't know what I have to find now. There are attached three screenshots of my BIOS, showing the Ram parameters. Three of them are configured manually, yet I'm not sure about what to do with the other.

Thanks again :D

wv1s.jpg

9e3g.jpg

3vhq.jpg
 
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Jayzied

Jayzied

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Thanks Tradesman! I'll be out all this night (is 21:30 hours in Spain), so I'll take a look tomorrow at morning ;D
 
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Tradesman1

Tradesman1

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Will want to set up manually, not sure where you got it, but it should have been part of a package of 2 sticks, not a single stick, the stick is sold in a single also but this is from a dual package. So, let's try the freq manually at 1600, DRAM voltage 1.55, CR (Command Rate/command timing - something like that) at 2T or 2N, the base timings at 10-10-10-27 and then head into the advance timings (the first of your screen shots) and change the tRFC to 128 (this is what told me this came from a 2 sticks set, 1 of the these is typically 128 and w/ 2 you jump to about 200-214. Give that a try and let me know
 
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Jayzied

Jayzied

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It doesn't seem to be the solution; if I put this values, the result is an unlimited reboot loop (due to it's necessary to remove CMOS jumper and reset BIOS). I've take a look at the supposed frequencies that should have this DIMM; all of them are put "by hand", yet the only one remaining is the tRC; this doesn't appear at my BIOS settings (either the voltage). I don't know if, with my BIOS settings, this values could be put manually, because there are many options as tRC that do not appear :/

Maybe, buying another equal DIMM could be the solution to have full functional RAM, running at 1600mhz... Although it has to be spend more money, something that don't like at all.

Thanks Tradesman, if you have another idea, I'll be glad to hear it, but if there isn't a solution, don't worry about it ;D

 
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Tradesman1

Tradesman1

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May also be the MC (memory controller) of the CPU is weaker than many of the like model...With any CPU there will be some that are down the middle, some weaker than the norm and some outstanding, same with DRAM, get two sets of sticks and 1 may OC rather well while the other can't OC at all above spec freq, just the luck of the draw when you order as to what your get
 
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Jayzied

Jayzied

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Mmm... If the CPU's MC were the principal issue, the system would have a lot of problems, right? That's because I've never experienced something bad except when I tried to OC the RAM over 1600mhz (in that case, the PC didn't reboot, so I had to turn off it within the PSU, etc.). This mobo has to be the principal problem, B75 chipset is really limited, and option as voltage or tRC don't appear in any area of BIOS settings.

I'm thinking about the idea to purchase another 8GB DIMM like this, or have a pair of 4GB CL9... If someone buy the older DIMM, of course :p

That have happened because few months ago I had no idea about computer, pieces, perfomance... Etc. Now, all my limitations in this time are taking its toll... Damn, with some more money, I could have purchased a Z77 mobo and other stuff that I've changed (GPU and PSU). Argh.

So, what could I do? I want my PC for gaming, so; should buy a new pair of DIMMs, or just buy another one like that I have? It will solve this problem? Because I don't guess that the principal one be the CPU... :/

(of course, I'll buy a new mobo... soon)
 
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Tradesman1

Tradesman1

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Try it at 1333 and might tighten the timings manually from the spec 1600 timings i.e. if 1600 timing start 9-9-9 then change those to 1333 and 8-8-8 that will put them on a performance par with 1600/9, just be losing a little bandwidth which won't affect a lot in gaming
 
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Jayzied

Jayzied

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Thanks again, but at least I'm going to purchase soon a new DIMM as the one I have now. Probably, I'll hang with my mobo one more year (I spend more money that I could imagine with all this stuff); actually, it should be enough for me.

Sorry for waste your time, but your contributions have been really useful for me; now, I have more knowledge about mobo chipsets and their specifications and RAM DIMMs, either. You have been a great teacher for me, Tradesman :D

 
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