BLOOMFIELDS CLOCK THE SAME

rjk · 20 Nov 2010 at 00:16

Dear all OcUK forum users

lots of threads are cropping up recently. there seems to be a lot of confusion.

all bloomfiled CPUS clock the same.

if you have a D0 stepping 920, 930, 950, 960, 975

all of these cpus clock the same.

they are bloomfiled cpus

they clock the same.

they have different multipliers

but they clock the same.

if you have a bloomfiled D0 cpu
you can overclock to 4.2Ghz using 200X21 using around 1.35v

IT REALLY IS THAT SIMPLE

there is no need for multiple threads about the matter
they all do it.

all the bloomfield D0 chips do it

if you have a gulftown/westmere the same applies but with 1.325v
there is no need for further discussion.

JonJ678 · 20 Nov 2010 at 00:18

Not convinced you're completely right about this 2bh mate, I'm sure I've seen more screenshots of 975s around the 5ghz barrier than 920s. None of it was under water though, and anyone under phase is likely to know the (few) differences between the chips.

Gary* · 20 Nov 2010 at 00:19

bloomfield

damn beaten to it

cloud84 · 20 Nov 2010 at 00:22

i wanna see you try to overclock my 920 D0 to 4.2ghz on air using my TRUE and a single Apache fan... I am hitting 90c at 4ghz using 1.2750 vcore.
Unless you imply that the requirement for 4.2ghz on air, is to sound like a jet taking off.

JonJ678 · 20 Nov 2010 at 00:23

That strongly suggests your mount is bad cloud, or perhaps that you've gone over the top on qpi voltage. The chip wont mind being at 90 degrees at least.

alex24 · 20 Nov 2010 at 00:23

So they're not speed-binned at all?

rjk · 20 Nov 2010 at 00:24

cloud

no matter tha amount of JD i have drunk and the amount of spelling mistakes that Jon and gary have poijted out

i can still clock your bloomfiled cpu to 4.2ghz on any cooling other than stock without drama

rjk · 20 Nov 2010 at 00:25

alexhull24 said:
So they're not speed-binned at all?

they are NOT speedbinned

explain why i have three i7 920 cpus on my desk at work that clock like demons

and outclock 950s

cloud84 · 20 Nov 2010 at 00:26

sorry i just reseated the TRUE tonight and even before it was fine and I am still getting the same results. this has nothing to do with seating the heatsink. it is not the first time i install a heatsink and not the first time i install a TRUE either.

rjk · 20 Nov 2010 at 00:30

cloud

any bloomfield cpu will do 4ghz

a bloomfield cpu on a decent cooler will do 4.2

this is a fact

setter · 20 Nov 2010 at 00:30

JonJ678 said:
That strongly suggests your mount is bad cloud, or perhaps that you've gone over the top on qpi voltage. The chip wont mind being at 90 degrees at least.

Agreed, i had the same cooler, same voltage on my own 920, highest i ever seen temp wise was 76c under LinX, of course, case cooling, cooler fan/s and ambient temp will effect temps as well. Below is a shot of my own i7 under a super mega and dual akasa vipers.

The cpu temps were a few c lower until i added two overclocked gtx 470's into the case.

bifday2k · 20 Nov 2010 at 00:30

Cloud as stated earlier, it will most probably be the qpi volt thats probably set to high, especially if its left on auto.

cloud84 · 20 Nov 2010 at 00:36

it isn't on auto. QPI is 1.2750, like my vcore. load line calibration is enabled otherwise it is unstable.
if you want to help i am all ears because it seems i am the only one left out of the party. i find 90c ridiculous when others are doing 60c but I also know that I cannot drop my vcore below 1.250v without risking stability.
as for my heatsink, it is tightened down completely and i have done the grain of rice method for the TIM which has never failed me before.
room temp is 24c and in summer i have seen the cpu hit 100c and throttle down to 2.4ghz.

rjk · 20 Nov 2010 at 00:36

without wishing to sound rude or condecending.

if you have a bloomfield

and you have a motherboard that does 200 BCLK

then you can get 4.2ghz with ease

200BCLK
21 multi

memory set to rated speed+timings

llc enabled
cpu vcore to 1.35v - 1.38v
dram volts to 1.65

done - no issues. these settings work on every single board

i am sick and tired of seeing these threads where people are asking the difference between a 920 a 930 and a 950

they have different multis
they clock the same, 200 X 21 does it.

i have overclocked over 5000 i7 cpus now.
they all clock the same if they are bloomfield cores

cloud84 · 20 Nov 2010 at 00:40

riiiight, i am hitting 90c at 1.2750 vcore and you want me to go with 1.35v and 1.38v.
yea, that's definitely gonna work.
i have a P6X58D Premium.

bifday2k · 20 Nov 2010 at 00:43

cloud84 said:
it isn't on auto. QPI is 1.2750, like my vcore. load line calibration is enabled otherwise it is unstable.
if you want to help i am all ears because it seems i am the only one left out of the party. i find 90c ridiculous when others are doing 60c but I also know that I cannot drop my vcore below 1.250v without risking stability.
as for my heatsink, it is tightened down completely and i have done the grain of rice method for the TIM which has never failed me before.
room temp is 24c and in summer i have seen the cpu hit 100c and throttle down to 2.4ghz.

Most having load temps in the 60's are generally on watercooling, or very very top end air (dual/tri fans).

Thats the same vcore and qpi i use, ok im on totally different cooling, and my case is well cooled also, the true should'nt be that bad with only 1 fan, so possible its the poor airflow in the case that may be keeping the temps high.

Id have a play about and see if you can sort out better case cooling, and also if adding a 2nd fan to the true may help.

cloud84 · 20 Nov 2010 at 00:47

the case is a PC-7FN. I ordered the vented bay covers and also the dual fan top for it. We will see how it goes with some extra air flow. I know the case fans don't move much air and they are noisy on top.
Does running 4.2GHz at 60c imply that the PC sounds like a hoover? It is opposite my bed so I need it to be near silent but I also want it at 4GHz because I encode often.
I am kinda desperate because everyone talks about going 4GHz and only reaching 60c under load but they don't describe exactly what cooling they use and if it is silent or a jet engine.

setter · 20 Nov 2010 at 00:51

A second fan can drop maybe 4-5c, mine is running very low due to very good case cooling, (3 x 1500 rpm intakes) cables tucked out of the way, vcore is also 1.2750, dual akasa vipers on a super megahelims, the TRUE is more than capable of handling an i7, the one i had, albeit lapped was grand on my i7, only got the super mega to try it out.

EDIT:Ghetto mod i done to add another intake fan.

Elastic cord, (or as i call it, g string elastic, its that fine). Mounted a fan in the 3 remaining bays of my Lian Li A70F.

cloud84 · 20 Nov 2010 at 00:57

yea i got all the cables nicely hidden behind the tray and everything. it is not my first pc and it is not my first overclock. i have even done water cooling in the past. it's just that this PC doesn't want to stay cool.
i will take a photos at some point and post them here. For now I got an ancient photo of my first water cooled PC

bifday2k · 20 Nov 2010 at 01:00

That will certainly help for sure cloud. The more airflow you can get will most certainly help.

My set up is totally different to setters, we both have the same temps, give or take a few degrees, but where he has faster fans mine are all on lowest they can run.

3 outtakes all running 500rpm
2 intakes on my dual radiator running 700rpm (which cool cpu/case)

But this is becuase im on water cooling, so i can get top air cooling temps for very little noise.

So the key thing is to try and get good airflow as best you can, without having to spend a fortune, even if its like mods like setter showed, every little helps.