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I7-950 temps w/ Coolermaster V8 - 67c load too high?

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December 4, 2010 3:08:26 PM

Hi all. I just put together my new system yesterday and i'm wondering if my CPU temps under load are too high, based on the cooler I have. Here are the vitals:

i7-950 stock
Gigabyte x58A-UD3R
6GB OCZ3G1600LV6GK
eVGA GTX 470
Coolermaster V8 cpu cooler
Coolermaster HAF 932 case
Coolermaster SilentProM 850W PS

I've been running Prime95 for the past 5.5hrs stable. Room ambient temp is about 68f and can go up to 75f (24c) in the summer. No overclocking at the moment - keeping CPU stock. Was expecting better performance from this cooler. Here are temps for high end under 100% load with Prime95 Blend test (temps according to Core Temp):

Core 0: 67c
Core 1: 65c
Core 2: 66c
Core 3: 61c

No overclocking yet, however I noticed in CPU-Z that the core voltage is 1.264V - guessing that is auto set based on load?

I understand the i7-950 chips run really hot, but guess I expected a bit cooler numbers with the V8. Am I in range or do I need to reseat/re-paste the chip? Using AS5, btw - did the vertical line method. Apparently there is a ~200hr break-in period with the paste, so perhaps I should re-evaluate then?

Thanks in advance for any help/advice!
December 4, 2010 7:46:46 PM

Update on my progress. I am trying these BIOS adjustments based on some google searching and advice...

Adjust the Vcore to ~1.15V, set Load-Line Calibration to Level 2, and disabled the following...

Intel Turbo Boost Tech.
CPU Enhanced Halt (C1E)
C3/C6/C7 State Support
CPU EIST Function

Any thoughts? Am I on the right track? Temps seem to be better under Prime 95 100% load (albeit only after a few mins of running):

Core 0: 59c
Core 1: 58c
Core 2: 58c
Core 3: 54c

Room ambient temp is still around 68f.
December 5, 2010 3:46:54 AM

That low temps for air cooling, im running a Corsair Water cooling H70 and i got 52c on prime load and 32c idle. I would care if temp goes over 70c +
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December 5, 2010 11:33:17 AM

Twoboxer said:
According to this review:

http://www.frostytech.com/articleview.cfm?articleid=231...

a V8 with a 150W load can run 18C over ambient with fan speed set to high, and 38C over ambient when set to low. What fan setting are you using? Did you try forcing "High"?
s

Hmmn. That review is from 2008 before the i7 came out I think. Not sure how those wattages compare to the heat from an i7.
December 5, 2010 11:34:50 AM

srgess said:
That low temps for air cooling, im running a Corsair Water cooling H70 and i got 52c on prime load and 32c idle. I would care if temp goes over 70c +


That makes me feel better. At least I'm in the ballpark it seems, but not quite sure yet. I need to find something that shows the range with stock coolers and aftermarket coolers for the i7-950.
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December 5, 2010 11:38:40 AM

You can prime to 70c safely no problem, if not overclocking I would leave Turbo on.

December 5, 2010 11:53:35 AM

sportsfanboy said:
You can prime to 70c safely no problem, if not overclocking I would leave Turbo on.


Ok will try that. I'm just trying to figure out if I *should* be at lower temps with this case/cooling/etc. Can't quite tell where I should be.
December 5, 2010 12:46:54 PM

Never rely on other benchmark to compare your result, most of them test it in open case to get best result as possible and for air cooling degree can change a lot with your case fans setup too. If u had to compare your result you need someone with the same Cpu heater and exact same CPU to make sure your temps are okay.
December 5, 2010 1:17:39 PM

srgess said:
Never rely on other benchmark to compare your result, most of them test it in open case to get best result as possible and for air cooling degree can change a lot with your case fans setup too. If u had to compare your result you need someone with the same Cpu heater and exact same CPU to make sure your temps are okay.


I understand and that makes sense. The ultimate question is, do I need to re-seat / re-paste my CPU? For the V8 it's a royal pain as I have to pull out my mobo from the case to get to the back of it -- so trying to gauge if it's worth it.
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December 5, 2010 5:46:44 PM

toran0x said:
Hmmn. That review is from 2008 before the i7 came out I think. Not sure how those wattages compare to the heat from an i7.
The reason I showed you that article was to show a 20C DIFFERENCE between cooling a 150W load at low vs high fan speed. That's a huge cooling differential.

So I ask again - what fan speed are you using? How is it being controlled (mobo or you?) It could very well be your cooler has more capacity you aren't using.
December 5, 2010 9:20:23 PM

Fan speed is max - via the PCI slot controller module that comes with it. Verified by turning it up and down. Heard the change in fan speed, although it's really quiet.

How can I make sure the mobo isn't auto-controlling the CPU fan? Is there a BIOS setting to disable?
December 7, 2010 4:40:00 AM

toran0x said:
Fan speed is max - via the PCI slot controller module that comes with it. Verified by turning it up and down. Heard the change in fan speed, although it's really quiet.

How can I make sure the mobo isn't auto-controlling the CPU fan? Is there a BIOS setting to disable?



BIOS>PC Health Status>CPU Smart FAN Control [Disabled]
December 7, 2010 11:48:32 AM

What settings did you change in bios for the first test? I also have the newegg system. I added an additional 6gb of memory. I couldn't get prime 95 to last 1 minute so I ran memtest and found 1 stick was bad. So I installed just 3 sticks and it only lasted 40 minutes.




COOLER MASTER HAF 932 RC-932-KKN1-GP Black Steel ATX Full Tower Computer Case
COOLER MASTER Intel Core i7 compatible V8 RR-UV8-XBU1-GP 120mm Rifle CPU Cooler
GIGABYTE GA-X58A-UD3R LGA 1366 Intel X58 SATA 6Gb/s USB 3.0 ATX Intel Motherboard
COOLER MASTER Silent Pro RS850-AMBAJ3-US 850W ATX12V v2.3 / EPS12V v2.92 SLI Ready 80 PLUS BRONZE Certified
Microsoft Windows 7 Professional 64-bit 1-Pack for System Builders - OEM
Intel Core i7-950 Bloomfield 3.06GHz LGA 1366 130W Quad-Core Processor BX80601950
EVGA 01G-P3-1373-AR GeForce GTX 460 (Fermi) Superclocked EE 1GB 256-bit GDDR5 PCI Express 2.0 x16 HDCP Ready
COOLER MASTER Megaflow 200 R4-LUS-07AB-GP 200mm Blue LED Case Fan
OCZ Vertex 2 OCZSSD3-2VTX120G 3.5" 120GB SATA II MLC Internal Solid State Drive (SSD)
Western Digital Caviar Black WD1002FAEX 1TB 7200 RPM SATA 6.0Gb/s 3.5" Internal Hard Drive -Bare Drive
ASUS DRW-24B1ST/BLK/B/AS Black SATA 24X DVD Burner - Bulk - OEM
OCZ Gold 6GB (3 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Low Voltage Desktop Memory Model OCZ3G1600LV6GK


December 7, 2010 12:49:02 PM

They were just the stock setttings. I didn't even run the "load optimized" settings as instructed by some of the pros here :( . Be careful with the OCZ memory - I had to return mine as it was spawning errors (lots) in memtest and resulting in regular BSODs. I hear things can get even more unstable when you double the 6GB.

Make sure to read the Gigabyte guide from bilbat here: http://www.tomshardware.com/forum/275856-30-gigabyte-gu...

Regarding the V8 fan, did you disable the CPU Smart FAN control? Just curious what the best thing to do is there.
December 8, 2010 2:21:38 AM

Heh disabling the CPU Smart FAN Control fixed my rpm issue - was at 1400rpm, now at 1800-2000 rpm. Will rerun Prime95 again with this. Also re-pasted and re-mounted the V8.

Update: This all made a nice improvement. I have the CPU fan (V8) cranked to max. Idle is now closer to 30c and load is upper 50s. I have kept vcore on auto, which is great for idle (drops to 0.960v) but on load it jumps to 1.24v. I may implement the manual 1.10v vcore setting from above, which would further decrease the load temps. This is all in the first day so my AS5 has not cured yet, which will decrease temps even more.

Hopefully things will stay stable for a while and I'll overclock in a few weeks. Thanks to everyone's help and patience while I muddled through this... :wahoo: 
!