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C2D 4300 on water; Asus P5B Deluxe Temp Questions

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March 30, 2007 5:49:24 AM

This is my first post, but I've spent a lot of time reading here in the forums. I've particulary enjoyed CompuTronix's temperature guide and his various posts, and I'm hoping he can help me here.

C2D 3400 stock
Asus P5B-Deluxe WiFi
Danger Den Watercooling
Good case fans / radiator fans (rad is outside case)

While running Folding@Home on both cores, Speedfan reads 40C on CPU and 33C on Core 0 and 1, while TAT reads 48C on each Core.

Here's what I think: Speedfan has the temps transposed--my "CPU" temp is actually Tjunction (but it's off...) and my Core temps are actually T-case. TAT is giving me Tjunction. This would make sense, as the Speedfan Core readings are exactly 15C lower than the TAT core readings.

But why is my Speedfan CPU reading about 5-7C lower than that TAT core readings? Is my speedfan install just screwed up? Maybe it's reading another sensor?

Other questions: Am I correct in assuming that TAT is reporting my Tjunction temps?
March 30, 2007 6:16:09 AM

If you have read Compu's posts or his guide you would know what he expects from you. You need to provide much more information in the proper format before you will be able to reap the benefits of his assistance.
March 31, 2007 1:29:17 AM

Roughneck,
Fill in your information to replace mine. This is what CompuTronix will need to assist you.
Think about what your seeing though... if you add 15C to the core temps then you have a 40C Tcase temp ("CPU") and a 48C Tjunction ("Core0, Core1") temp at full load with a 18C delta. Best I get with Air at 22C ambient is a12C delta.
Then go back and look at the temp chart in the C2D Temp guide... that is running cool.
For you max load, the accepted app to run is TAT so you might want to use that (which will give you yet another set of temps to look at) http://www.overclock.net/attachments/downloads/36838-in...

Hope this helps.

Ambient = 22C
Chipset = 965P
C2D = E4300
CPU Cooler = Scythe Andy Samurai Master (1500rpm)
Frequency = 9x333 = 2987.9 MHz
Load = TAT 100% load both cores
Motherboard = Gigabyte GA-965P-DS3 Ver. 2
Vcore = 1.35v max 1.325v as tested

Offset of +15C applied to Core0 and Core1
Temp 2, no offset applied


Idle: Case Cover OFF (Case Cover On)
TAT
CPU0 48C (50C)
CPU1 45C (48C)

SpeedFan:
Temp2 24C (28C)
Core0 42C (44C)
Core1 39C (42C)

100% Load: All these readings are with the Case Cover On
TAT
CPU0 70C
CPU1 68C

SpeedFan:
Temp2 57C
Core0 69C
Core1 67C
Related resources
March 31, 2007 2:22:40 AM

Thanks for the replies. I thought the question about which program was running which temps could be answered on less info -- I wasn't thinking that the temps are high.

Here's all my info:

Ambient = 22C
Chipset = 965P
C2D = E4300
CPU Cooler = DangerDen TDX Watercooling
Freq = 9x333=2987.9 MHz
Load = TAT 100%
Mobo = Asus P5B Deluxe WiFi
Vcore = 1.35
Vmem = 2.10
Vnb = 1.25

Idle Temps (no offsets):

Speedfan: CPU = 34C
Core 0 = 23
Core 1 = 23
TAT:
Core 0 = 42
Core 1 = 40

100% Load Temps (No offsets):

Speedfan: CPU = 58
Core 0 = 51
Core 1 = 52
TAT:
Core 0 = 65
Core 1 = 65

What do y'all think? Which temps are right? What should my offsets be? Are the temps too warm for what they should be with water?
March 31, 2007 2:44:22 AM

Quote:

What do y'all think? Which temps are right? What should my offsets be? Are the temps too warm for what they should be with water?


I think (although I don't seem to do it that well) that your core needs to go up ~15C and your CPU needs to go down. Only reason I say CPU down is that it seems like water shouldn't be that warm. Your Tcore just seems awfully warm for a water cooled processor. You are running the same CPU at the same clock and VCore as I am and by your numbers if we only offset the Tjunction temps by +15C my air cooled unit would be taking out your water (which just doesn't seem correct)

Without knowing what how your cooler is supposed to perform
e.g. Scythe Andy Samurai Master w/ stock 120 fan
Fan Voltage--Temp--°C Rise--°C/W
12V----------38°C-----16-------0.21
9V -----------42°C ----20------ 0.26
7V -----------46°C ---24 ------0.30
5V -----------51°C ---29 ------0.37
Load Temp: CPUBurn for ~20 mins.
°C Rise: Temperature rise above ambient (22°C) at load.
°C/W MP / TDP: based on the amount of heat dissipated by the CPU (measured 78W); lower is better.

I am not able to even take a guess at what I think CPU temp should be as a comparative value.

Maybe CompuTronix will bestow some wisdom on us for this one.
March 31, 2007 2:50:58 AM

Thanks for the speedy reply. I'm kinda wondering if there's something wrong with my watercooling.... maybe the block isn't seated properly.

I'm having an algae problem right now, but I really don't think it's so bad that it would radically affect the cooling, as my flow rates haven't been impacted....

I really appreciate your input, and I hope that a few others will chime in so we can figure this out.
a b à CPUs
a b K Overclocking
March 31, 2007 6:35:58 PM

Roughneck, your SpeedFan CPU (Tcase) is offset by +10, and Core 0 / Core 1 (Tjunction) are offset by -15, so use the "Offsets" section of the Guide to configure your corrections. Having said this, your temps appear slighty elevated for liquid cooling, with respect to Ambient and Vcore. Additionally, your temps show that Idle to Load Delta is suspiciously on the edge, or ouside the 25 degree spec at 29, which typically indicates yet another E4300 with a concave Integrated Heat Spreader.

Quote:
Idle Temps (no offsets):

Speedfan: CPU = 34C
Core 0 = 23
Core 1 = 23
TAT:
Core 0 = 42
Core 1 = 40

100% Load Temps (No offsets):

Speedfan: CPU = 58
Core 0 = 51
Core 1 = 52
TAT:
Core 0 = 65
Core 1 = 65


I recommend that you remove the block, and check the CPU for flatness. Don't be surprised if you end up lapping.

Hope this helps,

Comp 8)
March 31, 2007 10:06:03 PM

Thanks Computronix and whcp for kindly offering your help. I sincerely appreciate.

What does everyone thing about lapping the integrated heat spreader. Is it worth it in my case with my temps? I don't think I'll be OCing the CPU much more than it is already, and even then I'll only be running it OCed to 3GHz for about 5% of the time its on--most of the time it'll be at stock.

What say you?
a b à CPUs
a b K Overclocking
March 31, 2007 10:24:32 PM

If you now have a clear understanding of your temps, and have configured the appropriate offsets in SpeedFan, then 65c Tjunction (Core 0 / Core 1) at 22c Ambient are still very good temps, so feel free to enjoy your rig as it is.

Comp 8)
March 31, 2007 11:40:01 PM

Thanks again, Comptronix! You've set my mind at ease--along with many other folks here. It's very nice of you to help out so much in the "community."
a b à CPUs
a b K Overclocking
March 31, 2007 11:43:27 PM

You're very welcome. Were you able to configure the offsets in SeedFan OK?
April 1, 2007 4:48:05 PM

Quote:
Were you able to configure the offsets in SeedFan OK?


I sure was. Your guide is very helpful!
a b à CPUs
a b K Overclocking
April 1, 2007 4:50:10 PM

Excellent! Enjoy your rig. :D 

Comp 8)
!