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i7 965 good stable overclock

5.6K views 26 replies 15 participants last post by  xxbassplayerxx  
#1 ·
Thanking all for reading this.

I just got a i7 965 & it's my 1st i7. Got it coz it's cheaper than i7 975. Somehow ppl says that it's not worth it. Anyway that damage being done so just have to make max usage of it.

My new rig:
i7 965
Asus Rampage II Extreme
6GB Domanitor-GT 1866Mhz
Coasair HX1000w
2x SLi GTX275
80GB SSD X25M-34N
360 SATA HDD
Silverstone TJ07

Watercooling:
Swiftech Apogee XT
Feser X-Changer QUAD 480 Extreme Performance Radiator (4x 120mm)
Swiftech MCP655 12v DC Pump
Bitspower Water Tank Z-Multi 250
***Water cooling only run trough CPU & the Full Motherboard chips sets. Not getting Graphic Card as I waitting for the GTX 300 series

Q1:
High of overclock should I target for? I mean for a max stable 24/7 usage.
Having 5.0 to 5.2Ghz on my mind, am I being greedy?
Image


Q2:
What's the max & safe voltage/tempreature for i7 965. Just assuming that my water cooling can handell it.
Image


Q3:
Should I get another 12GB or 6GB? 12GB really helps?

Q4:
How far can the ram goes? stock is C7 1866Mhz. Can do C7 2000Mhz or C6 1866Mhz & stable?

Q5:
Should I overclock for higher Mhz or lower timing for the rams?
Thinking of 6GB high Mhz, 12GB lower timings.

I'm trying to go almost to the extreme. Not that I'm super rich. It's my last birthday gift for being SINGLE. Getting MARRIED soon. Don't know what's comming in life so I'm gonna get a SUPER PC.

Thanks to all. Sincerely thanks again... This PC means alot to me...

PS: Anyone asking "Why 2x SLi with that kind of rig?" Well... I'm waitting for the GTX300 series
 
#2 ·
Q1. Maybe 4.5GHz if you're lucky.

Q2: I wouldn't go above 1.3625.

Q3: 6GB is fine.

Q4: Just trial and error.

Q5: I'd go higher mhz
 
#5 ·
I had a 965 in my sig rig (P6T Deluxe), on a feser quad and GTz.

Q1:
High of overclock should I target for? I mean for a max stable 24/7 usage.
Having 5.0 to 5.2Ghz on my mind, am I being greedy?
Image


I could not get mine 100% stable at any voltage I was comfortable with beyond 4.24. I backed it off to 4.0 for every day use to keep volts down.

Q2:
What's the max & safe voltage/tempreature for i7 965. Just assuming that my water cooling can handell it.
Image


Define safe? Temps below 70C for me, voltage, who knows.

Q3:
Should I get another 12GB or 6GB? 12GB really helps?

As the memory controller is on the CPU, more RAM should impact your OC. I used 12GB of Patriot 1600, however.

Q4:
How far can the ram goes? stock is C7 1866Mhz. Can do C7 2000Mhz or C6 1866Mhz & stable?

There is no benefit to going beyond 1600, at least for me.

Q5:
Should I overclock for higher Mhz or lower timing for the rams?
Thinking of 6GB high Mhz, 12GB lower timings.

Again, 1600 is already brutally fast. I think I was nudging 30GB/s throughput?? The 965 lets you run 6.5GT/s on the QPI stock, which is 50% more than the (stock) 920..
..a
 
#6 ·
Quote:


Originally Posted by wierdo124
View Post

Q2: I wouldn't go above 1.3625.


No.

That's the MAXIMUM VID (VCC) state you will receive on your chip! This includes VID "states" for C1E, C-States, speedsteps (each multi probably), and of course, non-power saving state VID states. You are looking for the maximum voltage, which can be found in the spreadsheet under maximum and minimums. IIRC, the maximum is 1.55, but if that is not what your chip needs, it will degrade faster. Anything higher, iirc it will degrade much faster than the maximum rating.

I still don't get why everybody thinks that's the maximum voltage, and its the max voltage before it degrades.

(mmm copypasta)
 
#7 ·
Q1:
High of overclock should I target for? I mean for a max stable 24/7 usage.
Having 5.0 to 5.2Ghz on my mind, am I being greedy?
Image


I'd shoot for something like 4.2, but you might be able to get higher

Q2:
What's the max & safe voltage/tempreature for i7 965. Just assuming that my water cooling can handell it.
Image


I don't think voltage is much of an issue with i7's compared to heat. TJMax is 100c. In my experience, even with watercooling heat is the main thing to be concerned about when ocing.

Q3:
Should I get another 12GB or 6GB? 12GB really helps?

12gb has little to no use unless you photoshop or use some kind of texture rendering software daily

Q4:
How far can the ram goes? stock is C7 1866Mhz. Can do C7 2000Mhz or C6 1866Mhz & stable?

I've seen cas7 2000 before, not sure about 6

Q5:
Should I overclock for higher Mhz or lower timing for the rams?
Thinking of 6GB high Mhz, 12GB lower timings.

I'm trying to go almost to the extreme. Not that I'm super rich. It's my last birthday gift for being SINGLE. Getting MARRIED soon. Don't know what's comming in life so I'm gonna get a SUPER PC.

A higher cpu clock has more benefits in the real world. If your memory is clocked too high, triple channel starts losing it's benefits. You'd have to google more about that though
 
#8 ·
I know you don't want to hear this, and probably already have, but i would sell your 965 on amazon for however much you can get for it and buy a 920 and use the extra money for some other nice upgrades. (3 gtx385's maybe)

I made the same mistake when i built my rig and got a 940. I soon found that it would not go above 3.8 ghz no matter what. i sold it for $450 and bought a used 920 here for $200.

The truth of it is that unless you are using phase change, LN2, or Dry ice to cool the chip the OC limits for all I7's are the same. Because of the way the architecture works you will be limited most by your Temps or your Vcore. both of which are the same for 920, 940, 950,965, and 975.

with that said, the only way having the unlocked multipliers will really help is if you can get around those two blocks using some form of extreme cooling.

So again, make yourself even happier and sell that chip and upgrade something else. :)
 
#10 ·
Quote:


Originally Posted by Frodcord
View Post

I have an i7 965 and i run 4.2GHz 24/7 using 1.375v I don't know if it is 100% Stable but it doesn't crash.

have you not done any stability testing? try running prime 95 for 10 hours.

if it is unstable at all, even if it does not crash, it will degrade your chip and you will eventually have problems. if it is not stable then there are free electrons jumping all over the place in your processor and they will eventually build up small deposits that will cause it to short out and be gone for good. :-(
 
#12 ·
O... 10 hrs on Prime 95. KK I gotto try this. Somehow I believe it. I got some problems with this currect unit E8400. It's really ZOOM then kind starting to get signs of KABOOM.

Sigh... Prime95 is boaring ><"
 
#13 ·
If this computer means that much to you, sell the 965 on eBay and buy a 920 D0. The 965 is an older architecture (C0) which needs higher volts and doesn't OC as high as the newer D0 architecture of the 920 and 975.

If you get a B batch D0 you can get to 4.4 easy. If you get a 3845B or 3849B you can get to 4.7+.

If you stick with the C0 you're probably limited to 4.2 or so (and out a couple of hundred bucks.)
 
#14 ·
Quote:


Originally Posted by aph
View Post

If this computer means that much to you, sell the 965 on eBay and buy a 920 D0. The 965 is an older architecture (C0) which needs higher volts and doesn't OC as high as the newer D0 architecture of the 920 and 975.

If you get a B batch D0 you can get to 4.4 easy. If you get a 3845B or 3849B you can get to 4.7+.

If you stick with the C0 you're probably limited to 4.2 or so (and out a couple of hundred bucks.)

I agree with all of that except your numbers...

even most b batch D0's will never see 4.4. 4.0-4.2 is reasonable.

No I7 currently will hit 4.7ghz without using some sort of sub ambient cooling like phase or LN2 or Dice. On water if you can hit 4.4-4.5 you are very lucky.

and Very few C0 chips will get above 4.0 ghz. there are some shining examples of chips that will, but they are rare.
 
#15 ·
OP

A good idea would be to sell that 965 and get a 930 or a 920.(replacing 920).
I have an "A" batch i7 920 & I can easily get over 4.6GHz on air with cas 7 1T ,oc'd DRAM @1800MHz , SLI.
Oh, and thats with a decent vcore.
So heres the proof>
http://www.overclock.net/benchmarkin...-times-18.html
post # 346.
Luck of the draw on an A or B chip. & a little overclock experience will get you there.

good luck
 
#17 ·
Quote:


Originally Posted by M1 Abrams
View Post

OP

A good idea would be to sell that 965 and get a 930 or a 920.(replacing 920).
I have an "A" batch i7 920 & I can easily get over 4.6GHz on air with cas 7 1T ,oc'd DRAM @1800MHz , SLI.
Oh, and thats with a decent vcore.
So heres the proof>
http://www.overclock.net/benchmarkin...-times-18.html
post # 346.
Luck of the draw on an A or B chip. & a little overclock experience will get you there.

good luck

next time, use the permalink button, that did not even link me to the right page in that thread. i did find it though.

and you claim that is on air? can you do me a favor and post a pic of what your temps are? and I am assuming since that was for a benchmarking run that that was not entirly stable...

what can you get stable with at least 20 runs of linx with a problem size over 25000? oh, and with real temp open in the background so you know what you are putting your chip through.

Quote:


Originally Posted by LoneWolf
View Post

Thanks again guys. That i7 965 is gonna be history soon. Some nub is gonna buy it.

Bye bye 965... Hello 920 3845B or 3849B

Good choice. :)

keep in mind that you cannot find those batches in stores anymore. they can be found used, but typically they will also come with price tags between $300 and $400.
 
#18 ·
Quote:


Originally Posted by kevingreenbmx
View Post

next time, use the permalink button..no, that did not even link me to the right page in that thread. i did find it though.Sure am glad you did find it I was concerned.

and you claim that is on air? and you claim it isnt? can you do me a favor and post a pic of what your temps are? no and I am assuming yes..you are assuming since that was for a benchmarking run that that was not entirly stable...

what can you get stable with at least 20 runs of linx with a problem size over 25000? oh, and with real temp open in the background so you know what you are putting your chip through.no

.

1st on my iggy list
Image
 
#19 ·
Quote:


Originally Posted by kevingreenbmx
View Post

I agree with all of that except your numbers...

even most b batch D0's will never see 4.4. 4.0-4.2 is reasonable.

No I7 currently will hit 4.7ghz without using some sort of sub ambient cooling like phase or LN2 or Dice. On water if you can hit 4.4-4.5 you are very lucky.

and Very few C0 chips will get above 4.0 ghz. there are some shining examples of chips that will, but they are rare.

this guy has 4.8GHz on a Bloodrage, and water.
 
#21 ·
Quote:


Originally Posted by wierdo124
View Post

Q1. Maybe 4.5GHz if you're lucky.

Q2: I wouldn't go above 1.3625.

Q3: 6GB is fine.

Q4: Just trial and error.

Q5: I'd go higher mhz

agreed wtih weirdo, you can bench above 4.5 if ur good but for 24/7 I wouldnt go much I higher than 1.45volts or else it starts getting real hot, ive had my 920 up to 1.66v so its all about your cooling

Quote:


Originally Posted by kevingreenbmx
View Post

I agree with all of that except your numbers...

even most b batch D0's will never see 4.4. 4.0-4.2 is reasonable.

No I7 currently will hit 4.7ghz without using some sort of sub ambient cooling like phase or LN2 or Dice. On water if you can hit 4.4-4.5 you are very lucky.

and Very few C0 chips will get above 4.0 ghz. there are some shining examples of chips that will, but they are rare.

i hit 4.7ghz on water kev so I beleive you are incorrect, A batch too, its tough and ur temps go up but when you have 4 rads and everything is lapped its not too bad unless ur stressing at high vcores which I woudlnt do past wprime

but you could def sell it and go for a 920 instead and have more money for a 3rd gtx 275 or something
 
#22 ·
Alright. Here goes.

For maximum stable OC, 920 vs 965 probably isn't going to make a difference. I draw the line at 1.45V for 24/7 and that'll get me 4.2GHz 24/7 stable and 4.4GHz stable enough to game and bench.

The 965 will make a huge difference for when you're benching, though. Currently, I'm not limited by my chip. I'm limited by my board. The unlocked multi on the 965 allows you to scale beyond the limits of the motherboard. It also allows you to keep your memory at a decent speed.

For me to get my chip to 4.8 and 4.9 for some SPI runs, my memory will either be very fast with loose timings or low with tight timings. With the ability to set your BCLK at 186 and the multi at 26x, you could get 4.836GHz at stock memory speed. That's awesome.

So, if you plan to do some fun benching in the future and you're not hurting for cash, I'd hold on to the 965. I sure wish I had one!
 
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#24 ·
Quote:

Originally Posted by tha d0ctor View Post
damn bassplayer now I want a 965, who cares aobut VCORE is about temps and clocks!!! and super pi scores!!!!!!!!!!!!!!!
I want one too! I could sell my car...

Or my bass...

But I love them both too much!
 
#25 ·
Hey, sorry about my previous post guys. i wasn't trying to say that it was impossible, but i always like to think of things in terms of the average 100% safe.

I know that you CAN hit 4.7 ghz on water, but is it at a point that you can call it safe for 24/7 use?

that is the point i was trying to make. Also, i was taking into account that it is very rare to find a chip that will do that.

not trying to offend anyone. :)
 
#26 ·
I mena my 4.4 and 4.2 overclock settings are stable and ;safe; but I wouldnt leave it at 4.4 for over a few hours, I prolly shouldnt leave it at my 4.2 1.42v core but whatever it only gets hot during prime/linx