SB Overclocking Thread

[Castiel]

yup.

it was handed to me at the end of the party as peter (shimano) broke the world record on single gpu.



Can someone throw a Retail 2500K or 2600K on a kilowatt meter and track down how much voltage its pulling though the wall?
I want to see if the temps are greater then the ES samples we saw, or if it was a finer tuned and calibrated sensor that was updated.

Didn't shimano bolt evga for asus?

 

[Castiel]

Theres other threads.

Link them. I haven't seen any across the forums I post on. Everyone is getting paranoid

 

[TurtleBlue]

Markfw900...

I like this thread - read some of the posts and have a comment or 2 but first...

I have 3 MC's that are within 25 miles of me, including 1 that is in an economic depressed zone so the the tax rate for that one is 3.75%. I have been intriged by this whole SB business so I decided to take up MC's offer of a reduced-priced cpu and went out shopping on the 9th. Below is what I picked up.

- 1 SandyBridge i7-2600K CPU
- Gigabyte LGA 1155 p67A-UD3P mobo (there was an UD4P but not interested in doing SLI)
- 2 4gb Corsair XMS3 1333 Mem (9-9-9-24 1.5 volt ver 8.11) for a total of 8 gigs
- Windows 7 64bit Ultimate OEM
- Corsair HX650w Power Supply
- Crucial 128gb SSD RealSSD C300
- Seagate 500gb barracuda sata hard drive
- LG internal BlueRay player/ DVD burner Sata Drive

Already have on hand an Antec 900 Midtower which used to house an intel 478 mobo that has been running for over 8 years 24/7 until noticed a couple of caps starting to swell up. The monitor for this set-up is already attached to an Q6600 box so will attached to the DVI input of the HP 2710 27" 16:9 monitor. The Q6600 is attached via hdmi cable from the EVGA 460 card in that box which is doing Folding @ Home for Team Anandtech!

I will probably dump an 8800gt evga card I have laying about into this new setup for now and am thinking of getting a Zalman cooler for the CPU (either an 9500 or the 9700) since I have these in my other boxes and am quite happy with them.

Now, as to some of the posts, expecially those relating to SB cpu's dying within a week of installation - I generally do not overclock but was thinking of doing so based on the Anandtech's recent article on SandyBridge but I am going to approach this overclock business very conservative if at all. I was shocked to read that on the ASUS boards that what voltage you input will be supersceeded if you also select maximum overclock which changed one person's 1.65 voltage selection to over 1.9 voltes!!! What a minefield that is.

For now, the new box will be Folding and will try to do that bigadv(?) that has been mentioned in the Distributed Computing group. After a couple of weeks I will get the 8800gt video card to also run F@H and see if Sandy can do Bigadv AND GPU folding. If so, then I probably go out and get at least a 460 EVGA card and let her rip...

Wishing you and the rest of you SandyBridgers all the best!

TurtleBlue

 

[Majic 7]

Theres other threads.

Link them and read them because you evidently didn't read the first one. There are numerous comments in that thread about trying to find other threads confirming the rumour, so far none.

 

[d33pblue]

One common thread in the chip failures seems to be high voltage ram. I think it would be prudent at this point that if you plan on overclocking your chip, to stick with 1.5v ram to be safe. Intel explicitly states that using ram voltage over 1.65v will permanently damage the chip. Unfortunately MUCH of the DDR3 that is commonly available is 1.65v ram. This is right on the upper limit of what Intel allows. This might be ok for stock settings, but if you plan on overclocking the guts out of it, then using more conservatively volted ram is a good idea.

 

[Castiel]

I'm sure i can get away with running my dominators at 1.5v

 

[M1A]

As ask before? --------------------------------------------------------------------------------

Can somebody run some Passmark CPU benchies on their OC'd i5 or i7?

 

[d33pblue]

I'm sure i can get away with running my dominators at 1.5v

Probably, but I'd be curious to see what kind of frequency you get out of them at that voltage. Probably not 2000Mhz. Seems like 1600Mhz is about the highest you can get and still be at 1.5v.

 

[Castiel]

Probably, but I'd be curious to see what kind of frequency you get out of them at that voltage. Probably not 2000Mhz. Seems like 1600Mhz is about the highest you can get and still be at 1.5v.

I'll let you know in a few hours. UPS man gets here around 3

 

[Edrick]

Probably, but I'd be curious to see what kind of frequency you get out of them at that voltage. Probably not 2000Mhz. Seems like 1600Mhz is about the highest you can get and still be at 1.5v.

SB does not support 2000Mhz RAM.

Only 1600, 1833, and 2133.

 

[Maximilian]

Link them and read them because you evidently didn't read the first one. There are numerous comments in that thread about trying to find other threads confirming the rumour, so far none.

Heh i dont care i dont have sandy bridge, im just curious if anyones here had died for no reason :\

 

[Castiel]

Heh i dont care i dont have sandy bridge, im just curious if anyones here had died for no reason :\

No one has posted about killing there's yet

 

[scooterlibby]

SB does not support 2000Mhz RAM.

Only 1600, 1833, and 2133.

1333 also, right?

 

[aigomorla]

SB does not support 2000Mhz RAM.

Only 1600, 1833, and 2133.

lulz.. here's one more to add to your wrench.

Now whats the point in all the higher clocked ram when your bclk is locked at 100mhz. D:

 

[mv2devnull]

SB does not support 2000Mhz RAM.

Only 1600, 1833, and 2133.

Minor typo there. Multiples of 266.6 are supported. Like 1866. (Assuming bclk of 100.)


Where does the relation of 100 and 266 come from?

 

[Dadofamunky]

Dadofamunky, where did you order your 2500K from?

Heh. I snagged it from the Micro Center in Santa Clara the other night, one full day after the release party on Sunday. That Monday when I went in on the way to work to see if I could get one, they told me they'd sold out in 45 minutes and had a waiting list, which they put me on; then I went to work. Came back about 8 PM to buy a BluRay drive and the manager told me they'd gotten a surprise drop shipment in and had some left.

Freakin $169 before tax. I'd returned my unopened i7 950 there just a few days previously because I knew they were coming in and were a monster. Their prices right now can't be beat. So I hope to get this thing up and running next week.

This will be the first time in 25 years of building machines that I'll be on the bleeding edge. I can't wait!

Anyone killed theirs yet?

ROTFLOL

 

[Dadofamunky]

I'll let you know in a few hours. UPS man gets here around 3

I'll be real interested too, since I have CAS 8 1.65V Dominator RAM sticks. My guess is that 1.6V max should be just fine, and even if you give up a CAS level I doubt it's noticeable.

 

[Castiel]

I'll be real interested too, since I have CAS 8 1.65V Dominator RAM sticks. My guess is that 1.6V max should be just fine, and even if you give up a CAS level I doubt it's noticeable.

In the Asus manual it says 1.65v dimms are fine so i'm running them in XMP at 1866

 

[RussianSensation]

I'll be real interested too, since I have CAS 8 1.65V Dominator RAM sticks. My guess is that 1.6V max should be just fine, and even if you give up a CAS level I doubt it's noticeable.

My G.Skills are rated at 1.65V DDR3-1600 CL7-7-7-21. I can run them at 1.58v at those settings. So keep in mind, just because your ram is rated at 1.65V, doesn't mean you can't run it at much lower voltages. It doesn't hurt to try. MemTest is fairly quick to run.

 

[mnewsham]

My G.Skills are rated at 1.65V DDR3-1600 CL7-7-7-21. I can run them at 1.58v at those settings. So keep in mind, just because your ram is rated at 1.65V, doesn't mean you can't run it at much lower voltages. It doesn't hurt to try. MemTest is fairly quick to run.

Agreed, 1.58v is the max intel says is "safe", id go to 1.6v if I had to but I wouldn't run 1.65v personally

 

[Dadofamunky]

My G.Skills are rated at 1.65V DDR3-1600 CL7-7-7-21. I can run them at 1.58v at those settings. So keep in mind, just because your ram is rated at 1.65V, doesn't mean you can't run it at much lower voltages. It doesn't hurt to try. MemTest is fairly quick to run.

Yeah, exactly. A thread was posted quoting another thread on another site discussing the same thing. Things I WON'T do include: overvolting my new CPU; overvolting RAM or PLL; OCing before I have a good idea of what my stock voltages are on the board and looking for a BIOS update; tweaking the BCLK AT ALL.

Fact is, I'm surprised the 32nm process tolerates 1.35V. My C2D Wolfdale is running 1.26V 24/7.

 

[mclaren777]

*stupid question alert*

When you guys talk about overclocking your SB, is it just raising the Turbo speed or making the base clock permanently run at the OC speed?

 

[RussianSensation]

*stupid question alert*

When you guys talk about overclocking your SB, is it just raising the Turbo speed or making the base clock permanently run at the OC speed?

Raising the Turbo multiplier.

For example, 2500k Sandy Bridge normally runs at 100 base clock x 33 multiplier to give you a stock speed of 3300mhz or 3.3ghz.

You raise the multiplier to 45x and keep the base clock steady at 100. This is contrary to socket 1156/1366 where you would raise the base clock speed from 133 (unless you had an unlocked Engineering Sample chip in which case you could have adjusted the baes clock and multiplier on those older sockets).

 

[Markfw]

OK, I have my 2600k, but at full load (stock) on a Q6600 cooler, its doing 75c, so I am not overclocking until I get my megahalem (on the UPS truck right now)

 

[mclaren777]

Is this correct?

Stock 2600K: runs at 3.4GHz when it's idle and jumps to 3.8GHz when Turbo engages under load
OCed 2600K: runs at 3.4GHz when it's idle and jumps to OC speed when Turbo engages under load