Temp question for you Guru's

Johnmark · 10-15-2009, 05:10 PM

Have most of my new rig together now and am not really happy with the CPU temps. and am curious as to what the forum thinks?

i7920 4.2Mhz @ 1.38v, the rest is in my sig.
Rad mounted inside on the top of the case, and I have the side panel off right now.
At idle ambient air in the case is 22c, Res. water temp. is 24.5c, CPU cores are 37,37,40,40 and CPU is 28c.
This isn't much better than the fusion v2 I stuck on in the first place.
The rad fans are turned way down so I can get the water much cooler.
Under load and water at 25c temps are around 67c
res>cpu>nb>gpu>rad>res

So what do you think, seem a little high to you ? Do I need more pump?

P.S. Have remounted HK v3 using different TIMs and use a caliper to set the HK force to 250nm (x=18.2mm) with no noticeable change

HotGore · 10-15-2009, 05:40 PM

Is that temp the water coming into your res or out of it?

Johnmark · 10-15-2009, 05:47 PM

Quote:

Originally Posted by HotGore

Is that temp the water coming into your res or out of it?

Neither it is just a probe in the res., although they should be the same with my current loop config.?

shazza · 10-15-2009, 06:12 PM

Doesn't look too bad to me. The i7s do run hot. EDIT: just saw you also have your GPU on the same loop as the CPU? I'd say you're doing well with your temps...

I'm running essentially the same config @ 1.38 Vcore at 4.0 GHz (MCR 320 + GT fans at 1400RPM, EK Supreme Lt, MCP 355+XSPC res). Idle temps are in the 37 degree range, Load temps in the mid 60s. My ambient is a few degrees higher than yours, but I'm also running this in an open Torture Rack, so I've got better airflow than in a closed case. EDIT: and no GPU cooling.

Re water temps ... you can measure them in the XSPC reservoir, but you've got to make sure you get to equilibrium, and any changes in ambient will impact your Delta. I'm still working on my radiator setup, but you can see what I've got so far, if you're interested. Will be adding Core temperature data soon. More detailed info here.

Spawn-Inc · 10-15-2009, 06:13 PM

so i take it all you did was change from a dtek V2 to a heatkiller?

there won't be that big of a change, and more rad is needed for a larger temp drop.

Johnmark · 10-15-2009, 07:02 PM

Quote:

Originally Posted by shazza

Doesn't look too bad to me. The i7s do run hot. EDIT: just saw you also have your GPU on the same loop as the CPU? I'd say you're doing well with your temps...

I'm running essentially the same config @ 1.38 Vcore at 4.0 GHz (MCR 320 + GT fans at 1400RPM, EK Supreme Lt, MCP 355+XSPC res). Idle temps are in the 37 degree range, Load temps in the mid 60s. My ambient is a few degrees higher than yours, but I'm also running this in an open Torture Rack, so I've got better airflow than in a closed case. EDIT: and no GPU cooling.

Re water temps ... you can measure them in the XSPC reservoir, but you've got to make sure you get to equilibrium, and any changes in ambient will impact your Delta. I'm still working on my radiator setup, but you can see what I've got so far, if you're interested. Will be adding Core temperature data soon. More detailed info here.

I was looked at your rig the other day shazza, very nice

And you do some nice testing as well!

After reading your reply I'm more convinced than ever I should be getting better temps. Granted the idle temp's are O.K. my load temps are pushing 70c after a long prime and the GT1850rpms at max. speed.

Tell me if I'm off base here but I'm thinking I need more pump, as I have four feet of head to overcome as well as block restrictions. If I recall correctly each ft. of water exerts ~.5 psi x 4ft =2 PSI or 14 kPa just to get to the rad. !
I bought a mcp655 but it didn't fit the case nicely so I modded the MCP350 with an XSPC top(which really made a difference in my own testing). So I'm going temporary hook up the MCP655 and see what kind of difference it's higher discharge pressure makes.
P.S. the other thing that makes me think I need more pump is that I can take the bleed screw out of the top of the feser rad and I don't get water out. Every once in a while it will burp but that's it.

shazza · 10-15-2009, 07:15 PM

I dunno ... I'm not sure increasing flow is going to make a huge difference ( hopefully one of the experts will chime in) but, it might be worth trying the MCP 355 since you already have it.

I really do think your temps look pretty good. Remember - my setup has NO GPU, and NO NB block on it, so it's a triple MCR just for the CPU. So, even though the HK should be better than the EK, and your rad may be a notch above (altho pretty similar at those fan speeds, probably), you're still putting quite a heat dump into the loop.

And, if you have a stable OC at 4.2, that seems good to me. Have you tried running things with the sides off your case, just to see if it increases airflow?

Equinediver · 10-15-2009, 07:19 PM

Considering what you have in your loop, your temps look pretty good to me. Before I tore my WC system down, I was running a slightly higher idle, but I didn't have my gpu's on the same loop. My high's rarely went over 65.

I had my HK at 19.6mm, which I thought was the normal setting.

Johnmark · 10-15-2009, 07:28 PM

Quote:

Originally Posted by shazza

I dunno ... I'm not sure increasing flow is going to make a huge difference ( hopefully one of the experts will chime in) but, it might be worth trying the MCP 355 since you already have it.

I really do think your temps look pretty good. Remember - my setup has NO GPU, and NO NB block on it, so it's a triple MCR just for the CPU. So, even though the HK should be better than the EK, and your rad may be a notch above (altho pretty similar at those fan speeds, probably), you're still putting quite a heat dump into the loop.

And, if you have a stable OC at 4.2, that seems good to me. Have you tried running things with the sides off your case, just to see if it increases airflow?

Sorry shazza, I was memorized by how good your rig looks and didn't even notice you where cooling the CPU only lol
Yup she's as stable as can be at 4.2 and I'm sure I can get more out of it, but one thing at a time.
As you mention, I've got the pump here so I might as well give her a run to satisfy myself

Spawn-Inc · 10-15-2009, 07:33 PM

either pump will easily handle what your asking, so i don't see that being the issue.

i have 2 MCP655's and can run my whole loop (3 triple 120mm's rads, 2 blocks and about 15 feet of tubing) using just 1. but i run series for redundancy and because i had one when i had dual loops.

alacheesu · 10-15-2009, 07:44 PM

Your temps look normal to me. What kind of temps were you expecting?

skinnee · 10-15-2009, 09:06 PM

Quote:

Originally Posted by alacheesu

Your temps look normal to me. What kind of temps were you expecting?

I was thinking the same thing... wondering what the expectations are.

WeeMaan · 10-16-2009, 01:55 AM

Hijacking this thread if you don't mind.

I have a i7 920 @ 4,2ghz - 1,30v with load temps (linx) at 60-65 degrees celsius.
The cooling system is as follows:
Thermochill 120.4 with 4 GT @ 1300rpm (pull), Heatkiller 3.0 with mx2, DDC 3.2.
The loop is cpu only and the cpu is lapped, the radiator is fed with fresh air (lower apartment of my TJ07).

Is this okay temps? Seem a little high to me?

Russ_64 · 10-16-2009, 03:24 AM

Your temps at that OC look fine to me - the i7 is quite hot but Tmax is 100c. I have Oc'd to 3.6 (stable) and with NB and 2 GTX260's I am running at 58c 24/7 folding load.

Tackleberry · 10-16-2009, 05:31 AM

60-65 degrees celsius?
not worth of alert

M.Fixit · 10-16-2009, 07:25 AM

Quote:

Originally Posted by WeeMaan

Hijacking this thread if you don't mind.

I have a i7 920 @ 4,2ghz - 1,30v with load temps (linx) at 60-65 degrees celsius.
The cooling system is as follows:
Thermochill 120.4 with 4 GT @ 1300rpm (pull), Heatkiller 3.0 with mx2, DDC 3.2.
The loop is cpu only and the cpu is lapped, the radiator is fed with fresh air (lower apartment of my TJ07).

Is this okay temps? Seem a little high to me?

Weeman,

At 24 degC ambient at same O/C and 1.30625v in Bios I get 65 degC max on Core 0 (63, 64, 62 on the others) under LinX (~4.6GB mem, 25 runs). I have a triple XSPC - see my sig. My fans are set up to push, with rad at top of case. CPU not lapped. So I think you are probably OK - but you may be able to get a degree or two lower depending upon your ambient.

Hondacity · 10-16-2009, 07:34 AM

instability of my core i7s kick in at around 85c from the cores...85c will have a big impact on the imc... if you're at 60-75c on your cores..you're fine( i assume you know how to balance voltages)

Johnmark · 10-16-2009, 01:53 PM

Quote:

Originally Posted by alacheesu

Your temps look normal to me. What kind of temps were you expecting?

Thanks for all your input peeps

That question made me think a little harder lol and I am not unhappy with the temps, just thought they should be a little better after upgrading from the fusion V2 and to a Feser 360 from a MCR220.
The other thing at the back of my mind was that the rad doesn't seem to fill up completely. There is a bleed port at the top of the Feser and when I open it, it actually sucks air into the system?

I put the MCP655 in service and it seems to deliver more flow. At least it is more violent when displacing the air. As well the water temp is down ~1.5c when turned up to #5 (ambient the same as well as fan rpm). CPU temps dropped accordingly. But I won't be running this pump at #5 as the extra noise isn't worth the small decrease in temps.
Strange part is that bleed port still sucks air in, not as much as when running the modded MCP350 but it's not pushing water out?

century child · 10-17-2009, 08:14 AM

You are using the bleed port incorrectly. You should power down your system first, open your res (assuming it's at the highest point in the loop) then loosen the bleed screw until the radiator "burps" then quickly tighten down the screw again before too much liquid escapes and runs all over your system. Be sure to keep lots of paper towls or your preferred towels handy.

Conumdrum · 10-17-2009, 08:35 AM

When the system is running, fill the res as much as it will hold. Pinch the outgoing rad tube to restrict the flow quite a bit. Then open the bleed screw carefully. The added backpressure in the rad should push the air out the top. Watch out for a water jet!

My rads have a bleed screw, but they face to the bottom. So mine bleed air naturally.

Johnmark · 10-17-2009, 02:15 PM

Quote:

Originally Posted by Conumdrum

When the system is running, fill the res as much as it will hold. Pinch the outgoing rad tube to restrict the flow quite a bit. Then open the bleed screw carefully. The added backpressure in the rad should push the air out the top. Watch out for a water jet!

My rads have a bleed screw, but they face to the bottom. So mine bleed air naturally.

Tried that with the MCP350 and did get a couple of burps but no stream. Haven't tried that yet with the MCP655, the extra output of the pump should result in all the air being dispelled.
I'm also going to change my loop order pump>rad, which should put more pressure on the rad.

Johnmark · 10-18-2009, 12:31 PM

Changed my loop around res>pumps>rad>NB>GPU>res, put the modded MCP350 back in-line. And now the rad is full, don't want to be opening the bleed port now

Temps are slightly lower at 35,35,37,38 with the same water temp. Although I didn't do a rigorous test so that could just be error. Or due to replacing all the tubing, takes some force to push the 3/8" tubing onto those 1/2" barbs.

Thanks for your replies