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How important is voltage consistency/accuracy? - Page 3

post #21 of 62
Thread Starter 
Quote:
Originally Posted by TwoCables View Post
Also, now that I've seen a product page for the actual PSU, I am thinking that this PSU is much better suited for a system that isn't being overclocked. I mean, it probably won't be able to handle overclocking very well at all, so your instincts might be right that you may need to get a better one. :/
Can you elaborate? I wasn't aware that some PSUs are good to overclock and some aren't.

Quote:
Originally Posted by TwoCables View Post
Wow, those are very high temperatures for this voltage and this overclock. Is your room hot?
Maybe 80F max cause thats what the central AC is set to for the whole house, but with my window unit its probably more like 72-75 in my actual room.

Just ran the WEI assessment again, and one of my cores peaked at 74C so the C1E change didn't affect load temps. The 1 degree change can be attributed to the fact that it ramped up from 55C instead of 44C.

All in all an upgrade is probably in order if the part about it being actually only 450W is true, because if you add my stuff up I think im in the 400-450W range. (have a beefy vid card, HD5850)

edit: speaking of video, is it normal for the onboard gpu voltage to read 0.27V even though I've disabled onboard graphics?
Edited by joe7dust - 9/28/10 at 10:37pm
post #22 of 62
Wei isn't used to determine load temps.Use prime 95 and wait 20 minutes.
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post #23 of 62
Thread Starter 
disregard, post deleted.
post #24 of 62
Quote:
Originally Posted by joe7dust View Post
Can you elaborate? I wasn't aware that some PSUs are good to overclock and some aren't.
Well, I don't know how to be specific, but there is a wide range of PSUs that range from being no good, to being only good for a simple office computer, to being somewhat decent for a light gaming system, to being good for a heavy gaming system, to being no good for overclocking, to being somewhat decent for overclocking, to being being good for overclocking, and all the way to being absolutely amazing and even a bit overkill for overclocking (like, a PSU that can handle even the most extreme overclocking in the world).

This isn't dictated by the wattage or even the efficiency rating, but it's dictated by the quality of the internals and a few other variables which I don't know how to explain very well. I just know that this is all true. :/

So, it's best left up to the regular visitors in Overclock.net's Power Supplies forum (whom I sometimes affectionately refer to as "our resident power supply experts", or something to that effect).

Quote:
Originally Posted by joe7dust View Post
Maybe 80F max cause thats what the central AC is set to for the whole house, but with my window unit its probably more like 72-75 in my actual room.

Just ran the WEI assessment again, and one of my cores peaked at 74C so the C1E change didn't affect load temps. The 1 degree change can be attributed to the fact that it ramped up from 55C instead of 44C.
Where do you keep your computer? Is it in an enclosed area, or just out in the open? If it's in an enclosed area, then that's very bad - especially for overclocking since overclocking generates quite a bit more heat. But if it's just out in the open, then perhaps the heatsink isn't installed tightly enough.

Also, the WEI isn't practical to use for getting load temperatures (or even full load). Instead, use something like Prime95 (scroll down a tiny bit to see the hard-to-find download links; their site doesn't have a good design), and use the Small FFTs test in this program for 10 minutes.

Quote:
Originally Posted by joe7dust View Post
All in all an upgrade is probably in order if the part about it being actually only 450W is true, because if you add my stuff up I think im in the 400-450W range. (have a beefy vid card, HD5850)
For this rig having the 5850 in it, any quality 400-450W is actually more than enough, believe it or not. But I would never chance it on a cheap one in that wattage range.

Quote:
Originally Posted by joe7dust View Post
edit: speaking of video, is it normal for the onboard gpu voltage to read 0.27V even though I've disabled onboard graphics?
I don't know.
Edited by TwoCables - 9/28/10 at 10:50pm
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post #25 of 62
Thread Starter 
Thanks I'll check that subforum out when/if I decide to get a new PSU.. you recommend that I do?

Also my system shut down after about a minute at prime 95. This is because I turned on thermal control in BIOS (off by default) and set it to the highest setting (85 C)

The prime 95 torture test may be overkill as the most CPU intense thing I run is Starcraft 2 at max settings. You think I'll still hit 85 running SC2? I can't test now because the installation is broken, I'm waiting on a forum reply to see if reinstall is necessary or not.

edit: about my case there is plenty of room and I have the side panel off. There is 1 system fan running but its low-rpm and not having much effect since case isn't closed. I probably wont close the case until I get another system fan or two.

edit2: also I'm sure I could get much better temps with aftermarket cooling and using my artic silver. Just using the stock intel fan and the paste that came with it for now. (yea yea I know I sound like a noob now.. was being lazy when I installed it)

Like I said I wasn't originally planning to OC but needed 20% OC to put memory/mobo at advertised specs of 1600Mhz.
Edited by joe7dust - 9/28/10 at 11:02pm
post #26 of 62
Quote:
Originally Posted by joe7dust View Post
Thanks I'll check that subforum out when/if I decide to get a new PSU.. you recommend that I do?
Well, I think I'll leave it up to the experts who can be found floating around in that forum to determine what kind of a PSU you have.

Quote:
Originally Posted by joe7dust View Post
Also my system shut down after about a minute at prime 95. This is because I turned on thermal control in BIOS (off by default) and set it to the highest setting (85 C)

The prime 95 torture test may be overkill as the most CPU intense thing I run is Starcraft 2 at max settings. You think I'll still hit 85 running SC2? I can't test now because the installation is broken, I'm waiting on a forum reply to see if reinstall is necessary or not.
Unfortunately, the three preset tests in Prime95 are required to test a system's stability when it's overclocked. When a system is not overclocked at all and is basically at stock just like a pre-built computer, it should be rock-solid stable. But when it's overclocked, it naturally becomes unstable. So, the length of time a system can last during each of these tests can determine just how stable an overclocked system is (except, no overclocked system can truly be 100% perfectly stable - but they can be stable enough that the natural instability is not a threat at all).

So, overclocking can require quite a bit of patience. But it's not because of the stress testing: it's because of the trial & error. Stress testing does indeed consume several hours per test, but they can be run while you're sleeping - especially when you have to leave right away after waking up (such as going to work or school or something else). All three of those tests in Prime95 should be able to run for at least 10-12 hours each in order to call an overclocked system "stable". This means that there's enough stability that the natural instability won't be a problem at all.

Quote:
Originally Posted by joe7dust View Post
edit: about my case there is plenty of room and I have the side panel off. There is 1 system fan running but its low-rpm and not having much effect since case isn't closed. I probably wont close the case until I get another system fan or two.

edit2: also I'm sure I could get much better temps with aftermarket cooling and using my artic silver. Just using the stock intel fan and the paste that came with it for now. (yea yea I know I sound like a noob now.. was being lazy when I installed it)
Overclocking with the stock heatsink is never a good idea, but these temperatures are extremely high for the 1.18V. So, I still think that the heatsink is just too loose. :/ Does it wobble at all? Even a little bit?

But yeah, if you're going to really be overclocking, then aftermarket cooling is basically required.
Edited by TwoCables - 9/28/10 at 11:11pm
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post #27 of 62
Thread Starter 
Quote:
Originally Posted by TwoCables View Post
So, I still think that the heatsink is just too loose. :/
You may be right, I hate the intel heatsink system. Its just plastic nubs that click in to hold it. I much prefer AMDs clip/bracket as it feels much tighter.

I should probably see if a 'screw-on' aftermarket heatsink exists for my socket.

I'm going to reseat this with arctic silver and see if that helps, be back in a few!
post #28 of 62
Quote:
Originally Posted by joe7dust View Post
You may be right, I hate the intel heatsink system. Its just plastic nubs that click in to hold it. I much prefer AMDs clip/bracket as it feels much tighter.

I should probably see if a 'screw-on' aftermarket heatsink exists for my socket.

I'm going to reseat this with arctic silver and see if that helps, be back in a few!
Oh, they are indeed a pain (both figuratively and literally).

But yeah, there are many excellent aftermarket air coolers that use screws instead. Some even have adhesive on the backplate (the piece the screws go into) to make moving a motherboard from one case to another easier.
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post #29 of 62
Thread Starter 
Looks like the AS helped a little, the average core temp is 51-52 instead of 54-55. The one that says 'CPU' is down to 27C from 33C. I haven't been using this sensor though because it seems to barely move at all and only got to 40C once during stress testing. (while one of the cores hit 74 under WEI assessment... I forgot to look what it said during the Prime 95 where a core hit 85 and the BIOS turned off the system)
post #30 of 62
Quote:
Originally Posted by joe7dust View Post
Looks like the AS helped a little, the average core temp is 51-52 instead of 54-55. The one that says 'CPU' is down to 27C from 33C. I haven't been using this sensor though because it seems to barely move at all and only got to 40C once during stress testing. (while one of the cores hit 74 under WEI assessment... I forgot to look what it said during the Prime 95 where a core hit 85 and the BIOS turned off the system)
Then let's check with Real Temp and see what it says.
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250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
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It's a computer!
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i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
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250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
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