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RAM for OCing i5 760

post #1 of 29
Thread Starter 
I'm getting a good cooler and hoping to overclock my i5 760 on a p55 chipset from 2.8Ghz to 4.0Ghz. I'm also going to upgrade from 4gb ddr3 ram to 8gb, but i'm not sure what kit i should get, with OCing in mind of course.

What i'm considering is G.Skill Ripjaws X F3-10666CL7D-8GBXH (1333mhz, 7-7-7-21 timing, 1.5v) or another kit that is 1600mhz, 9-9-9-24, 1.5v. What is more important when buying ram when you are going to OC your CPU: low voltage, low timings or speed? I could also get some kits that run on 1.65v, but that seems a little high.

i basically need some info indicating what ram i should get. also what performance increases would i see by bumping up my i5 by 1.2Ghz (overall system performance and gaming)

Thanks in advance.
post #2 of 29
P55 is an excellent platform to OC RAM smile.gif I had some fun times with my i7 860 back when I had it.

But anyways, generally P55 is considered to like higher frequency over low timings when it comes to memory. So going for a high frequency kit would probably give you marginally better results than going for a kit with low timings. Of course having the best of both world would be great but I don't really see the point of paying too much extra for RAM since you really won't see the difference in anything else than synthetic benches. So just go for a high frequency kit with decent timings and a decent price and you're gonna be golden.

As for the voltage, it doesn't really matter, P55 can handle high voltages when it comes to RAM. 1.65 is perfectly fine and you can even bump 1.65v kits to well over 1.7 to run 24/7 and be perfectly fine. Only thing to remember is that when OCing you should keep the IMC voltage within 0.5v of the vDIMM. So if you're going to be running 1.75v RAM you should keep the vIMC at 1.25 or more.

All in all, RAM isn't that important if you're going for a relatively simple 4.0GHz OC.

Also the performance increases from bumping your CPU to 4.0 will vary greatly depending on what games and apps you're going to be running.
 
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Benching
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CPUMotherboardGraphicsRAM
[i7 5960X @ 4.8GHz] [Rampage V Extreme] [Titan 1400MHz (1500MHz bench)] [Various] 
Hard DriveCoolingCoolingCooling
[250GB 840EVO +2x SpinpointF3 1TB RAID0] [LD PC-V2 SS Phase Change] [XSPC X2O 750 pump/res] [Monsta 360 full copper + EK XT 360 + XT 240] 
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2x 5870, 5850, 5830, 5770 2x 3870x2, 3870 GTX Titan, GTX 480, GTX 590 GTX 285, GTX 260, 4x 9800GT, 8800GTX 
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4x4GB vengeance, 2x4GB predatorX, 2x1GB OCZ DDR2 Intel X25-M 80GB LD PC-V2 SS Phase Change OCN Marksman 
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post #3 of 29
Check out my Accioheather's Cpu-Z. I have done this before using Gskill Sniper 2x4gb 1333mhz RAM. I used a p7H55-M pro board though. thumb.gif
post #4 of 29
Thread Starter 
Okay, thanks for the info smile.gif The main game i play ATM is BF3.
post #5 of 29
why dont you check out the Samsung 30nm 1600mhz kits they are selling that are able to hit 2133mhz easily with SB and around 2500 with SB-E. I have seen some people hit 2000 on them with 1st gen i7s. http://www.newegg.com/Product/ProductList.aspx?Submit=ENE&N=100007611+50001077&QksAutoSuggestion=&ShowDeactivatedMark=False&Configurator=&IsNodeId=1&Subcategory=147&description=&hisInDesc=&Ntk=&CFG=&SpeTabStoreType=&AdvancedSearch=1&srchInDesc= page with the models numbers of the chips Im talking about.


oh yeah and they are cheap too to boot, might have to find them some where else as newegg is out of stock of the 2x4gb kits. Apparently amazon has them still

And i forgot they have a ton of info about them over at XS also loaded with ppl trying out the 1333mhz and 1600mhz 2x4gb variants.
Edited by terraprime - 2/19/12 at 1:43am
 
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post #6 of 29
Thread Starter 
Quote:
Originally Posted by Alatar View Post

All in all, RAM isn't that important if you're going for a relatively simple 4.0GHz OC.

I thought 4ghz with this chip would be a good realistic goal. So how much more could i OC the i5 760 without pumping in too much more voltage? 4.5Ghz too much?
post #7 of 29
Quote:
Originally Posted by Dom-inator View Post

I thought 4ghz with this chip would be a good realistic goal. So how much more could i OC the i5 760 without pumping in too much more voltage? 4.5Ghz too much?

Well yeah 4.0GHz is a realistic goal and you shouldn't expect much more than that (for example my 860 needed 1.45v for 4GHz). But it's still easier to OC than the i7s, needs less voltage and has lower temps.

I'm sure there are some 760s around that can barely do the 4.5GHz @ 1.45v on water but those should really be rare. If you get lucky at all with your chip I'd say that with 1.4vcore you could try and push for 4.2GHz+. But it all depends on how voltage hungry your chip is and how well it's cooled.

GL thumb.gif
 
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Benching
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CPUMotherboardGraphicsRAM
[i7 5960X @ 4.8GHz] [Rampage V Extreme] [Titan 1400MHz (1500MHz bench)] [Various] 
Hard DriveCoolingCoolingCooling
[250GB 840EVO +2x SpinpointF3 1TB RAID0] [LD PC-V2 SS Phase Change] [XSPC X2O 750 pump/res] [Monsta 360 full copper + EK XT 360 + XT 240] 
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2x 5870, 5850, 5830, 5770 2x 3870x2, 3870 GTX Titan, GTX 480, GTX 590 GTX 285, GTX 260, 4x 9800GT, 8800GTX 
RAMHard DriveCoolingCooling
4x4GB vengeance, 2x4GB predatorX, 2x1GB OCZ DDR2 Intel X25-M 80GB LD PC-V2 SS Phase Change OCN Marksman 
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2x old tek slims (GPU) Various watercooling stuff win7, winxp AX1200 
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post #8 of 29
Quote:
Originally Posted by Alatar View Post

Well yeah 4.0GHz is a realistic goal and you shouldn't expect much more than that (for example my 860 needed 1.45v for 4GHz). But it's still easier to OC than the i7s, needs less voltage and has lower temps.
I'm sure there are some 760s around that can barely do the 4.5GHz @ 1.45v on water but those should really be rare. If you get lucky at all with your chip I'd say that with 1.4vcore you could try and push for 4.2GHz+. But it all depends on how voltage hungry your chip is and how well it's cooled.
GL thumb.gif

I'm not sure that you can get past 4ghz. When I was looking for references the highest Oc's were 4ghz. I think i saw 1 4.2ghz under water and done by crazy profesional Oc'er
post #9 of 29
Keep in mind that RAm timings and V's are advertised and tested values, with certain equipment... Installed in your system, the timing and voltages may differ as to what is stable. GBXH is some good stick if they have the hynix chip in them... I think I saw one guy get them to 2300Mhz but it wasn't stable past that...1.68V if I recall You may well throw what ever RAM you get in there and when set to auto it just may go to 1.68V and not be stable any other way at any other timings... without a lot of tweeking, when overclocked, it can and does happen.

I used some CL7 Ripjaws in a GD65 as well as this board and now I have kingston H-X1600RAM ($35). The Kingston benches just a tad better and was a tad cheaper. I go 4GB/slot sticks personaly.... just the way I was tought to do it, so I aggree with you there. Dual channel 8GB's is more than enough for most applications and programs.

In all practical applications you will notice no difference betwen 1333 and 1600RAM in gameplay... (My tune right now is 1124Mhz and it benches almost no differently than 1500Mhz) except my CPU temps rise about 2-3C when the RAM frequency get turned up... So even higher will just stress your IMC more & a few FPS here and there is not "noticable" in my book unless some frame rate monitoring is being used...
Edited by gtfoxy - 2/19/12 at 5:33pm
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post #10 of 29
Thread Starter 
Thanks guys, ended up getting some kingston HyperX 1600Mhz. Seems like a decent kit for p55

Now just an air compressor to clean the dust out of my PC (LOL) and then a new cooler, most likely the antec H2O kuhler 620, i've had my eye on it for a while.
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