anyone running 5GHz 24/7 on their SB system?

rjk

rjk

rjk

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looking at a changeover in the coming months to a SB based system

i have a 5ghz cpu at the moment [albeit with higher volts than i would like]

i have seen the 5ghz thread but that only really covers runs with superpi

what i am after is if any users have 5ghz stable using LinX/Prime95/IBT

specifically from 2500 and 2600 K series chips.

thanks

rjk
 
My chip will bench most things at 5.4GHz - Super-Pi at 5.5GHz
But for 24/7 use I choose to run it at 4.8GHz to keep voltages and temps within safe bounds. I could run at 5.0GHz, it is nice and stable, but does need that bit extra in voltage terms.

There are not that many chips that will do 5.0GHz stable, but nearly all will do 4.8GHz
It's also no good looking at batch numbers cos its really random regarding which will do extreme clocks and which wont... 2 chips with the same batch will perform quite differently.

2600K improves your chances - there are a few 2500k's that will do 5GHz, but far more 2600K's

In all my clocking I always use all the cores and HT so the 2600K is well worth it imo.
 
Is that on air or water? Can you generally get 5Ghz 24/7 on the latter?

Going to pull the trigger on an SB build with one of the new motherboards so would be interesting to know this :).
 
joxang said:
Is that on air or water? Can you generally get 5Ghz 24/7 on the latter?

Going to pull the trigger on an SB build with one of the new motherboards so would be interesting to know this :).
Click to expand...

I'm using an H50 which is more like Air than true water tbh, but with SB that really does not make a huge difference. Its more a question of being comfortable running the higher voltages required for 5.0GHz stable.
 
As Simon has said, the 2600K is a safer bet for 5GHz stable 24/7. You will be able to run 5GHz with a top end air cooler and most certainly have no problems with a quality water cooling solution. However no two CPU's perform the same. You will need to tweak your system to suite your hardware. It takes a bit of time but at the end of the day the time spent is worth the out come.

I have one system at home running @ 5GHz which is folding currently. Both on the CPU and the dual graphic cards. So far it is solid and has been running for nearly three weeks without any problems. The only thing I needed to do was fine tune my PLL to get the optimal thermal solution vs vCore.

49 x 102 = 5GHz

1.420 Vcore
1.760 Pll
1.080 Vtt
LLC 1

This is on a Gigabyte UD5 board by the way. I found that if I went to the 50x multi I needed to up my vCore to 1.440 and that pushed my temps way up.

Cooling solution is a Swiftech XP CPU block. Thermochill 120.3 and 655 pump. Temps stay mid 50's through out.

This is not my golden CPU by the way. This poor fellow will not budge past 5.1GHz for love or money.
 
Do any of your chips do 5Ghz @ < 1.4vcore Linx stable?

Mine will do 20 passes at 1.37v @ 4.8Ghz however when I try for 4.9 at up to 1.39 it fails to get into windows (it doesn't blue screen it just stops at the black screen directly before the windows load, with a flashing underscore at the top left hand of the screen).
 
beh* without doubt I have some CPU's that will do Linx stable at 5GHz. Please bare in mind that two of my CPU's bench Vantage stable over 5.72GHz. I binned heaps and heaps to find those two. :D But I just do not see the point in putting any of my CPU's through that kind of unnatural stress, I bin CPU's for benching which is one of my main hobbies. And yeah I know that is not a natural stress either. But for me it is :), just as for others Prime and Linx is normal.

There have been a few posts here of guys doing hours of Linx at 5GHz. Will try and find the post and link it here.
 
1Day - I know that you like to bench, however as per the OP, I'm also interested in understanding how many of us have chips that will do 5Ghz IBT/Linx stable on less than 1.4vcore :) In any case I'll await your post :)
 
1Day said:
beh* without doubt I have some CPU's that will do Linx stable at 5GHz. Please bare in mind that two of my CPU's bench Vantage stable over 5.72GHz. I binned heaps and heaps to find those two. :D But I just do not see the point in putting any of my CPU's through that kind of unnatural stress, I bin CPU's for benching which is one of my main hobbies. And yeah I know that is not a natural stress either. But for me it is :), just as for others Prime and Linx is normal.

There have been a few posts here of guys doing hours of Linx at 5GHz. Will try and find the post and link it here.
Click to expand...

If you don't mind me asking, how do you have "Heaps and heaps" of them :confused:

Do you buy them all yourself?
 
I know about 1day's endeavours :P

Just wondered if she gets them for free via some sponsor or something (Most unlikely)

Or she just loves benchmarking stuff till death :D
 
Sadly I have to pay for all my CPU's - what I do is buy as many as I can afford at a time. Normally just after pay day. So for example the last time I bought 11 retail CPU's. I test each one for about 10 minutes to see what the max multi is and what the max BCLK is. And cull those that just do not make the grade. Once I have whittled down the processors to the best few I then test more fully for maximum frequency. I then sell those I do not want on. Out of all I have tested 20+ only two benched 5.7GHz or higher. One I kept and one I sold to a UK bencher.

For a CPU that will bench 5.6 GHz you are getting a good price from other benchers, globally. It is a lottery and they would rather pay a premium for a dead cert 5.6 + than take a chance and get a 5.8 or possibly lame duck at 4.8. The ones which do not clock so well I do make a loss on. At the end of the day it all balances out. Well almost. :) I also build many systems for mates - gamer systems and they do not want a CPU that needs 1.5 volts. They just want their systems to be fast. Fast I can do with a CPU I call a dud. It still does 4.8 rock solid. :)

Simon the problem is those darn corgi's they keep peeing on the single stage. :D

Still looking for that link it is in the 5GHz thread, or at XS. But I will find it.
 
98420349.png


and

1002x50_1067_88824_L21_OCZ_F6D.png


and

linx.png


This is a very wide image.

http://i458.photobucket.com/albums/qq306/owikh84/168.jpg

so too this one

http://i458.photobucket.com/albums/qq306/owikh84/prime.jpg

Source. # 1 Source. #2

Still think there is someone here on our forum that has done linx too. I posted some Prime in one of my threads but not sure if it was at 5GHz. Will do some if anyone really wants.
 
found some nice chips
so the question remains, which one...

both these clocks done on a p67 pro using 8gb corsair xms

thinking we should be good to go at these voltages on my water. expecting around 50'c load temps at least.

both these clocks were done on a megahalem with a 38mm fan. the mount on the i7 run was a bit of a rush job and the temps reflect that.
either way, its going to be a lot cooler on water.

the i7 is a little better, it took marginally less vcore to hit the target.

i am fairly certain that no cpu will do 5ghz at less than 1.4v at the moment. i had an hour out of the i5 yesterday at 1.38v but then a core dropped out. :(

the i7 dropped a thread early on but im sure i can iron that out.

5GHz.jpg


5ghz2.jpg
 
Both of those are very good. And you are spot on about the vcore and 5GHz. I have found that for some reason there is a big step up needed for stable above 5GHz. What was the max multi you could boot into OS with? And at a 48 or 49 multi what is the max BCLK you can get? I think you might have found two rather juicy CPU's there. At least I hope so.
 
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