My e4400 needs a HSF reseat or lapping?

[lowboyee]

e4400 @ 3GHz 300x10
1.375v
Scythe Ninja (rev.b) w/ supplied TIM
P150/Solo case with 120mm Yate Loons @ 7v (one on HS, one right behind it as a case fan)
60c under Prime95 load, 25c idle, 20ish ambient.

I hit 60c under load with the case closed and 59c with the case open, and full-swing fans don't reduce temperature vs the 7v I'm running them at. I tried the Antec Tricool at full blast and it didn't have any effect.

I don't mind running at these temperatures but I wouldn't mind some more headroom for further overclocking.

 

[SerpentRoyal]

E4400 has 100C Tjunction. You can push CPU up to abou 75C when Priming. Also raise Vcore up to 1.465. Chip should be able to hit 3.2GHz.

 

[lowboyee]

Coretemp is reporting a TJunction of 100c and a temp of 75c, while Speedfan is reporting a TJunction of 85c and a temp of 60c.

I've looked into CoreTemp vs. Speedfan and I think Speedfan is reporting the correct temperature here, but in either case I wouldn't like to have less than a delta of 25c.

Also, I'd like to think that I could get lower temps with this setup.

 

[SerpentRoyal]

Speedfand does not report Tjunction! There has to be sufficient air flow to cool the CPU. 7V ain't gonna cut it.

 

[lowboyee]

No, but AFAIK it uses TJunction to calculate the temperature of the chip. CoreTemp incorrrectly reports TJunction as 100c when it should be 85c.

Also, try reading my first post regarding a YL @ 7v versus my Antec Tricool at full blast (@79cfm). The Ninja is an efficient cooler in low air flow situations and doesn't benefit much at all from higher air flow.

 

[SerpentRoyal]

Your temperature does not support your claim of efficiency.

You claimed that Speedfan reports a Tjunction of 85? So where is it?

 

[ChronoReverse]

E4400's are either stepping L2 or M0. Both of which have a tjunction of 100. Core Temp 0.95 tends to be the most accurate.

60 degrees under load is really nothing to worry about.


As for the Ninja comment, there are a number of caveats (note, I'm using a Ninja too). First, it could easily be a non-flat contact that's causing the inefficiency. Second, the Ninja is only better than average in the Tower HSF arena now. Third, in my experience, higher airflow still helps.

 

[lowboyee]

SerpentRoyal - if CoreTemp says 75c when using a YL@7v and 73-74c when using a TriCool@79CFM, I can infer either that my YL is putting out quite a bit of CFM for an undervolted fan, or that the Ninja doesn't benefit from higher airflows. Either way, putting a higher-CFM fan in there isn't the solution.

Using a TJunction of 100c, CoreTemp is consistently 15c higher than Speedfan. So what do you think that Speedfan's TJunction is?


ChronoReverse - CoreTemp vs. Speedfan is sketchy territory, but I'm more inclined to believe Speedfan from what I've read. If CoreTemp is right, I'm running at an idle of 39c in an ambient environment of 20c and a load of 75c.

Either way, I'm at 25c away from TJunction and I don't like it.

 

[ChronoReverse]

This isn't anything about reading. M0 and L2 steppings have a tjunction of 100. All E4400's are either M0 or L2, ergo, all E4400's have a tjunction of 100.

Speedfan incorrectly assumes a tjunction of 85 which is the usual for C2D's but isn't the case for the E4400 (or the Q6600 for that matter).

 

[lowboyee]

I'm reading your post right now, aren't I? And as I haven't been able to read anything official (read: sourced form Intel) about the E4400's TJunction, reading posts is the only process by which I can come to conclusions.

Anyway, back to the matter at hand: I'm sitting at a delta of 25c under load and 60c idle in a room that's 20c. Is it worth it to get some AS5 and try lapping my CPU?

 

[ChronoReverse]

Seems to me if increasing the fan speed doesn't change anything that means the contact probably isn't very good. That said, 60 degrees (if that is correct) isn't bad. 75 is too high though.

As for the tjunction (technically tjmax), it seems Intel themselves haven't been forthcoming about releasing information about it. Tomshardware seems to be the only definitive guide.

http://www.tomshardware.com/fo...core-temperature-guide

 

[perdomot]

Coretemp reports my E4400 @ 3Ghz is idle at 47 degrees. Is that good?

 

[ChronoReverse]

Do you have Speedstep/EIST off? What's the ambient temperature? Are you using the stock HSF?

From the limited information, I'd say it seems rather high.

 

[lowboyee]

Originally posted by: ChronoReverse
Seems to me if increasing the fan speed doesn't change anything that means the contact probably isn't very good. That said, 60 degrees (if that is correct) isn't bad. 75 is too high though.

As for the tjunction (technically tjmax), it seems Intel themselves haven't been forthcoming about releasing information about it. Tomshardware seems to be the only definitive guide.

http://www.tomshardware.com/fo...core-temperature-guide

That is a wealth of information there and it seems pretty legit.

Anyway I should be picking up some TIM soon and I'll try reseating the Ninja and maybe lapping it. Thanks for the help.

 

[perdomot]

I believe I have Speedstep/Eist off as its recommended for OCing. Using an old XP-90 heatsink on my cpu with a 92mm fan. What temp should coretemp read if things are OK.