These are all the links that come to mind when sandybridge users think about overclocking
These articles not only help 1155 users choose RAM but also show what overclocking them really does in terms of benchmarking and everday usage. I recommend reading those before overclocking RAM or choosing it for Sandy!!
All credit to the articles above. This is my take on the whole sandybridge RAM:
After reading those articles I have some what come to my own
conclusion about choosing and overclocking RAM. If you've read the articles you would have seen how the high speeds and low latency affect performance and general usage. With that said, I believe that a standard kit of 1.5v is good enough for general everyday usage, the difference is VERY
minimal. Choosing RAM depends on how much you want to spend, how much capacity you need and whether or not you're going to be benching more or less frequently.
On that note if your looking for a moderate overclock without
sacrificing the amount of RAM then choose any of the ones under the 'bit of overclocking headroom', however with those, there are some with the low voltages.
You might say "what is the point of overclocking them then if the difference is minimal?" well that is because of benching ie. super pi etc. I have found that high speeds and low latency impacts benching more than anything else. Now we have found two types of 'conditions', benching and everday usage.THIS
kit is pretty decent for benching, 4GB much easier to overclock and maintain low latency, it comes at 1600mhz with 6-8-6-24 with 1.5v and costs $60
Now pretty much the same kit but pre-overclocked to 2200mhz, THIS
kit costs $150, same 4GB, 7-10-10-27 with 1.65v.
I'm quite certain that $60 one could reach 2133mhz with 1.65v with ether 7-8-7-27 or 8-8-8-27. That said don't jump straight into pre overclocked kits, some cheaper ones can probably do the same or even better. With that said, if your not looking for RAM for benhcing then the ones I mentioned aren't for you instead look for some decent 1.5v rams.
The CL9 1.5v seem to be the most popular ones amongst those that are not really interested in benching and because they have found that it doesn't make much difference in everday usage. If you want the capability of maybe benching now and again but don't want to fork out that much then I would advise you to get a 4GB and either a CL7 or CL8 kit. Not interested in benching and believe that your good enough for general everday usage then get the CL9 1.5v kits. End of the day DDR3 is DDR3, it should work across the board, the only thing to consider is voltage. Made for a particular chipset is BS, it'll more than likely work, I mean there ain't no reason not to. The G Skill, Corsair kits etc are pretty good and im sure you won't have any problems with them, unless the RAMs are rated 1.8v+ or something you should be fine.
Due to recent developements in my brain lol It has come to my attention through reading various articles, threads and receiving help for some of the member's here (badatgames, FTW 420, Bassplayer, Noguru) that overclocking capabilities lies truly with the Integrated Circuit (IC) of the RAM. There are various type of IC, HERE
is a good list of them. I will try my best to explain some of the more popular ones in the benching section below for those that are not familiar.Some examples:1600mhz Kits - 1.25v - 1.5v (Click to show)
For general everday usage (1.5v):G.SKILL Ripjaws X Series 8GB (2 x 4GB) 1600mhz CL9 1.5vG.SKILL Sniper 8GB (2 x 4GB) 1600mhz CL9 1.5CORSAIR Vengeance 8GB (2 x 4GB) 1600mhz LOW Profile CL9 1.5vCORSAIR Vengeance 8GB (2 x 4GB) 1600mhz CL9 1.5v ----** REVIEW & OVERCLOCKING **----Mushkin Enhanced Blackline 8GB (2 x 4GB) 1600mhz CL9 1.5vMushkin Enhanced Silverline 8GB (2 x 4GB) 1600mhz CL9 1.5vMushkin Enhanced Radioactive 8GB (2 x 4GB) 1600mhz CL9 1.5v
1866mhz ** Currently Working on (Click to show)
Pick the cheapest from the above if you ain't fussy over the colour or whatever, there all pretty much the same spec and price. The review and overclocking for the Vengeance kit could be used for the other kits aswell, however these kit's vary so does their potential so one could do better than the other but I really don't see it going higher than 1866 with decent timings, with these kits, you could probably get away with 1.65v and those timings at 1866 but I don't think you can go higher than that without crazy votlage and loose timings. Below are ones that are a little better:Maybe a bit of overclocking headroom these 8GB kits, little more expensive than the ones above:G.SKILL Ripjaws X Series 8GB (2 x 4GB) 1600mhz CL8 1.5vCORSAIR Vengeance 8GB (2 x 4GB) 1600mhz CL8 1.5v(Below 1.5v)Mushkin Enhanced Blackline 8GB (2 x 4GB) 1600mhz CL9 1.35vG.SKILL Sniper Low Voltage Series 8GB (2 x 4GB) 1600mhz CL9 1.25v ----** REVIEW & OVERCLOCKING **----
These kits are could actually be pretty good for a little benching aswell, that's only if you can overclock them. Some have shown really bad overclocking capabilities, such as the CORSAIR Vengeance LP 8GB (2 x 4GB) 1600mhz CL9 1.35v. Yes the voltage is low and you would tihnk that it would overclock, but unfortunatly it wouldn't budge, Check the REVIEW
of the corsair kit HERE
That's not to say that the other lower voltage ones like the sniper 1.25v and the mushkin 1.35v would be the same, if you hit the review button on the snipers, you'll be able to see what it's capable of, not sure about the mushkin's though, but I would like to think that it does have some overclocking potential, hopefully not the same as the Corsair LP.
The RipjawX are quite appealing with the latency at CL8 and the voltage at 1.5v. The Blackline CL9 and Sniper CL9 are in that list of 'bit of overclocking headroom' because of the low voltages compared to the other's, so they definitely have potential. Going by price and potential, picking one of these may be tough so ask away....
The 1.35v Mushkins and 1.25v Sniper's are pretty decent, low voltage = win, for some it may be worth it and I certainly recommend it as you can more than likely tighten the timings with a little votlage bump. So the 1.35v mushkink's and the 1.25v Gskill Sniper's are really the ones to go for if you want just a little bit better and the capability of overclocking and tightening them. Those are great for everday usage and a little light benching now and again. Ultimatly the key aspect is the low voltage.
I would always recommend getting the low voltage ones, whether it be 1.5v, 1.35v or 1.25v, however, both the mushkins and snipers that are below 1.5v have a latency of 9 as opposed to the others that have latency 8 with 1.5v, so it's not that simple. That's a tough one to choose, do you go for the ones that are below 1.5v, say the 1.25v ones and would it do better than the cl8 1.5? Not sure but I would hope so. Price is also a factor here. But like I said, problems deciding??? ask away here.......
For general everday usage (1.5v):CORSAIR Vengeance 8GB (2 x 4GB) 1866mhz CL9 1.5v ----** REVIEW & OVERCLOCKING **----
2133mhz COMING SOON (Click to show)
For ALL benching purposes:G.SKILL Ripjaws X Series 4GB (2 x 2GB) 1600mhz CL7 1.5v ----** REVIEW & OVERCLOCKING **----
Apparently the Corsair's above are truly terrible for overclocking, however, it works just fine under XMP which it's suppose to. G.SKILL Sniper Series 8GB (2 x 4GB) 1866mhz CL9 1.5v ----** REVIEW & OVERCLOCKING **----
According to the review above, again the overclocking capability was lacking, however they did mange to run it at 2133 even though the timings were 11-15-15-38, which to be honest is just crap lol.G.SKILL Ripjaws X Series 8GB (2 x 4GB) 1866mhz CL9 1.5v ----** REVIEW & OVERCLOCKING **----
Now these are a little surprising, reviewer's above were able to overclock these to 2133mhz with 9-11-10-28, T2, at 1.56v (Stable after hours of prime blend). Max overclock of 2155Mhz, with timings at 10-12-10-28 with a command rate of 1T at 1.6v DRAM, and 1.2v QPI (VCCIO). Pretty impressive if I say so myself. Please read the review for more details.Kingston HyperX 8GB (2 x 4GB) 1866mhz CL11 1.5v
Not so sure about those. C11 doesn't sound all that good.GeIL Evo Two 8GB (2 x 4GB) 1866mhz CL9 1.5v
Similar timings as the Ripjaw X, however can't find any reviews on them, I'll update once I find anything.GeIL EVO CORSA Series 8GB (2 x 4GB) 1866mhz CL9 1.5v ----** REVIEW & OVERCLOCKING **----
Same timings as the Evo Two, however the review stated atleast a 5% overclock. Read review for more info.Crucial Ballistix 8GB (2 x 4GB) 1866mhz CL9 1.5v ----** REVIEW & OVERCLOCKING **----
Unfortunately I couldn't find any other reviews on these Ballistix RAM's, however a quick glance says that they are pretty decent and can clock to 2133mhz without any issues, not bad for a yellow kit Mushkin Enhanced Redline 8GB (2 x 4GB) 1866mhz CL9 1.5vCORSAIR Vengeance LP 8GB (2 x 4GB) 1866mhz CL9 1.5vCORSAIR DOMINATOR GT 8GB (2 x 4GB) 1866mhz CL9 1.5v
These are the ones I got and I managed to overclock them to 2133mhz
with 9-10-9-27 1T @ 1.65v. Here's my little review.G.SKILL Ripjaws X Series 4GB (2 x 2GB) 1600mhz CL6 1.5v ----** REVIEW & OVERCLOCKING **----Mushkin Enhanced Redline 4GB (2 x 2GB) 1600mhz CL7 1.5vG skill Eco 1600mhz CL7 1.35v ----** REVIEW & OVERCLOCKING **----Badatgames review of a few Kits for Benching purposes
As we know by now that Sandybridge has a lack of BCLK tweaking, making overclocking RAM on SB quite difficult, that and the fact that the 2400 strap doesn't seem to work on the Asus mobo's. Anyway as mentioned before the overclocking capabilites lies with the Intergrated Circuit of the RAM. The various types of IC will be talked about in the thread and the best ones will become apparent as we discover their potential with Sandy. The way you can tell what IC you have is by the timings, (courtesy of Bassplayer
for helping me out here)
Misc reviews, 16GB included:16GB (4x4GB) G.Skill RipjawsX (2133mhz) F3-17000CL9Q-16GBXLD 9-11-9-28-2T8GB (2 x 4GB) Mushkin Enhanced Blackline (2133mhz) PC3 17000 Model 997015 10-11-10-281.65v RAM on Sandbridge
Warning: Spoiler! (Click to show)
The stuff you find most often in enthusiast chips are Elpida Hypers, MNH-E (the earlier revision that was prone to die) and MGH-E, as well as Elpida BBSE, PSC (Powerchip), and apparently Hynix has some performance modules.
For example, the following are Hypers:
1600 6-6-6, 1600 6-6-5
1866 7-8-7, 1866 7-7-7, 1866 7-7-6
2000 8-8-8, 2000 8-8-7, 2000 7-8-7, 2000 7-7-7, 2000 7-7-6
2250 8-8-8, 2250 9-9-9 (some)
2300 9-9-9 (some)
Warning: Spoiler! (Click to show)
As you can see majority of the kits I have mentioned are either 1.5v or below
, that's not to say that a 1.65v kits won't work, but that is the highest you should really be running these RAMS for 24/7 anyway. General consensus is lower voltage is always better, however, 1.65v WILL
work if you ALREADY
have it. Dopamin3 recently, bought this next bit of info to my attention (big thanks):
If you have a 1.65v keep it and use it with sandy, if you want to buy a new kit, any of the ones mentioned above for your particular usage will suffice.
RAM Timings explained
One other thing, mixing RAM isn't as straight forward as you think, most RAMs are advertised by showing only the first 5 timings, command rate 1T and 2T, however there are other's to consider. That's why it's best to stick to one 'kind'.
Originally Posted by Inteller;14525989
But to the "new to building" people, or just "memory challenged", they may need to be made aware that the timings that they normally see, ie: 8-8-8-24 1T, are only the 5 most advertised timings, and there are many more than that. So then they would take that into consideration when asking the question, can I add this set of Mushkin Redline, to this set of G.Skill.
Originally Posted by Inteller;14622982
just to show how many actual memory timings there are, and this is a big reason that mixed memory fails due to unmatchable timings. For example:
Dram Timing Control
DRAM CAS# Latency: 7
DRAM RAS# to CAS# Delay: 8
DRAM RAS# PRE Time: 7
DRAM RAS# ACT Time: 20
DRAM RAS# to RAS# Delay: 5
DRAM REF Cycle Time: 90
DRAM Write Recovery Time: 13
DRAM Read to Pre Time: 8
DRAM Four ACT Win Time: 24
Back to Back CAS# Delay: Auto
DRAM Timing Mode - 2N
There are also more, but you get the picture!
and it'll give you a better understanding of timings.
Please feel free to discuss
I'll be updating this as I go along.
Hope that helps