Bitcoin Forum
December 06, 2016, 10:19:44 AM *
News: To be able to use the next phase of the beta forum software, please ensure that your email address is correct/functional.
 
   Home   Help Search Donate Login Register  
Pages: [1]
  Print  
Author Topic: GPU 450 Mhash/s , HEAT problem! , Specs in thread.  (Read 1320 times)
Frequenzy
Newbie
*
Offline Offline

Activity: 3


View Profile
July 06, 2011, 05:01:31 AM
 #1

Alright so i just started out and have read alot of guides and my head is killing me.

Anyway , my problem is that my GPU's are going up to 80c each

Specs:

2x HD radeon 6850 Dual Fan
AMD Phenom(tm) X6 1055T
Crosshair IV Formula

When i am running both my GPU's i get up to 450 Mhash/s,
But the Heat is killing my computer, I can maximum have it up for 15 minutes
before Black Screen.

Can anyone help me with this ?

Edit: Normally my cards are at 42-45 c
1481019584
Hero Member
*
Offline Offline

Posts: 1481019584

View Profile Personal Message (Offline)

Ignore
1481019584
Reply with quote  #2

1481019584
Report to moderator
1481019584
Hero Member
*
Offline Offline

Posts: 1481019584

View Profile Personal Message (Offline)

Ignore
1481019584
Reply with quote  #2

1481019584
Report to moderator
1481019584
Hero Member
*
Offline Offline

Posts: 1481019584

View Profile Personal Message (Offline)

Ignore
1481019584
Reply with quote  #2

1481019584
Report to moderator
Advertised sites are not endorsed by the Bitcoin Forum. They may be unsafe, untrustworthy, or illegal in your jurisdiction. Advertise here.
incognegro
Newbie
*
Offline Offline

Activity: 23


View Profile
July 06, 2011, 05:18:23 AM
 #2

You can get 400 MH from 1 of those 6950 if you flash the BIOS with the 6970's and overclock.
As far as your heat problem, it looks like you got an airflow problem.
My 6970 is overclocked as far as it will go and it peaks out at 72c but I have a 4U server chassis in an enterprise rack (open chassis top, 8 fans) and 4 fans at the top of the rack.
You might need to water cool it somehow.
80c is way too high.
McFly
Newbie
*
Offline Offline

Activity: 18


View Profile
July 06, 2011, 05:21:19 AM
 #3

Alright so i just started out and have read alot of guides and my head is killing me.

Anyway , my problem is that my GPU's are going up to 80c each

Specs:

2x HD radeon 6850 Dual Fan
AMD Phenom(tm) X6 1055T
Crosshair IV Formula

When i am running both my GPU's i get up to 450 Mhash/s,
But the Heat is killing my computer, I can maximum have it up for 15 minutes
before Black Screen.

Can anyone help me with this ?

Edit: Normally my cards are at 42-45 c

Underclock you memory to lower your heat/elec usage. You should still get the same hashrate.
Frequenzy
Newbie
*
Offline Offline

Activity: 3


View Profile
July 06, 2011, 05:25:27 AM
 #4

Thanks for the Reply incognegro,

Here comes a picture of my setup , dont laugh ;(
http://i.imgur.com/x9ci0.jpg

I got 0 fans on the chassi , only for the processor and the agg
WillMitchell
Member
**
Offline Offline

Activity: 84


View Profile
July 06, 2011, 06:42:36 AM
 #5

Go get a big box fan from walmart and put it near the exhaust of the case facing away (pulling air out)

I went from overclocking from 725 to 755 at 104C to 815 at 93C with just this...
xurious
Sr. Member
****
Offline Offline

Activity: 364


View Profile
July 06, 2011, 10:42:48 AM
 #6

You need to turn fan speed to 90% at least. You need some chassis fans. A fan on the side cover of your pc. Or just leave a box fan next to it.

SiaMining.com -- First PPS SiaMining Pool! 3%, VarDiff, Stratum Support
newunit16
Member
**
Offline Offline

Activity: 115


View Profile
July 06, 2011, 11:05:10 AM
 #7

your computer locks after 15minutes of being at 80*C? something else may be going on. i set my cards to idle when they reach 85*C, and pick back up under 75*C. you shouldnt be screening at 80*C.

90% fan speed is kind of high. i run my 4x 5830's at 75%, may drop it some too. the higher you run them, the shorter they last.

from the look of that case, you NEED fans. you should get 1 exhaust fan (goes by the processor and sucks air out) and at LEAST 1 intake fan on the front of the system. nearly all cases are setup for front intake. also if you case has a side vent, it wouldn't hurt to get a an intake fan there, blowing on the GPU's if possible.

i suggest setting either a) good temp profiles for fan speed or b) constant fan speed. saying "90% at least" is ill information. play around with it, and get it to a comfortable level. my 5830's run about 60-70-70-75 celsius with 75% fan speed. the variance is due to the unique config of the cards. you will notice the top card will run hotter due to it sucking in warm air from the ass end of the other card.

grid
Jr. Member
*
Offline Offline

Activity: 42


View Profile
July 06, 2011, 12:00:55 PM
 #8

Is that a 650W PSU? If yes, then that PSU is probably running at 100% (or more) rated load, which could account for the instability and lockups.

80C temps can only lock up a card if overclocked. If the cards are at standard clocks, and they lock up at 80C, then look to the PSU for the source of the instability.

Also, that HDD is getting the heat treatment, since cards tend to exhaust hot air at both ends. HDD won't last very long.

Join the Bitcoin Developer Charity Pool!
Mainframe Mining Cooperative - http://mining.mainframe.nl/

14RtT14g2vccJJCwyA7fWbeBwSnZ1MwZLs
haydent
Full Member
***
Offline Offline

Activity: 154



View Profile
July 06, 2011, 12:07:05 PM
 #9

a big thing for me and im sure others is ambient room temperature. if i have it in room with heater running it will make 80c or 90c easy. but without heat (it is winter here in au) i get a nice cool 70c.

but as may have been mentioned its not just gpu fans that effect their temp, all the fans will help cool the hole thing down, so look into better or more case fans, even leave the case open and as suggested get house fan aimed at it

2x Gigabyte 6950 OC @ 920/450 w/ ati tray tools (1 shader modded) - 760Mhs on ozco.in 0% fee aus pool
btc: 1HS5Brzcsh7XkJn566XYbvfpa2JuBRBdss
pbj sammich
Sr. Member
****
Offline Offline

Activity: 272


Fighting Liquid with Liquid


View Profile
July 06, 2011, 12:17:17 PM
 #10

I agree with the post above it looks like a 650 watt power supply which probably isn't enough

And fans, you needs them
haydent
Full Member
***
Offline Offline

Activity: 154



View Profile
July 06, 2011, 12:22:29 PM
 #11

a heavily loaded psu will also add heat

2x Gigabyte 6950 OC @ 920/450 w/ ati tray tools (1 shader modded) - 760Mhs on ozco.in 0% fee aus pool
btc: 1HS5Brzcsh7XkJn566XYbvfpa2JuBRBdss
Opsamk
Member
**
Offline Offline

Activity: 119


View Profile
July 06, 2011, 12:28:23 PM
 #12

You can get larger hashrates by not using crossfire.

1FaTKKYFBtrDfn558AbgbVcmgjsV7SLzk9

Feeling generous? Send me some bits Smiley
Frequenzy
Newbie
*
Offline Offline

Activity: 3


View Profile
July 07, 2011, 04:34:30 AM
 #13

Thanks for all the Great tips! I did as some of you said and went and bought a new Case


XIGMATEK Xigmatek Utgard Mid-tower
UTGARD
http://images.bit-tech.net/content_images/2010/04/xigmatek-utgard-case-review/xigmatek1-1024x1024.jpg

"UTGARD" - Beyond the world of mankind and Gods, home of Giants and Trolls. DOMINATED by LOKI, the God of Giants. Combining design and features such as coated SECC and steel mesh are spotlighting your chassis when your system is built. Furthermore this chassis is supplied with 2 x 120mm pre installed fans on the front and the rear, one top fan with the size of 170 mm, but another 6 fans can be mounted in different areas for best possible airflow. 9 x 5.25" bays will be able to house all your optical drives, an external 3,5" device adapter and a 3 to 4 HDD Device. Tool free design and a "gorgeous" outlook are only a few points why this chassis is a "must" not only for enthusiast but also for pc beginners.

    Classic chassis exterior contains pure black coating interior even with each screw. It is more elegant and fancy design than any other mid-tower chassis with ATX, Micro-ATX, ITX form factors.
    Utgard was designed by gaming and cooling thinking within tool-free hard drives and add-on card installation, easy installation CPU cooler back plate window, four pipe holes for water cooling system and seven cooling fan space at most.
    0.7mm SECC chassis body, both side 5.25" tool-less holders, anti-vibration rubber on PSU space, and HDD tray with rubber screw holes are all the user-friendly and system-stable concepts.


    All mesh design on front panel.
    Screw-less tooling for 5.25" bay installation.
    Screw-less tooling for expansion slot installation.
    Four 3.5" HDD in three 5.25" bay adapter.
    Preinstalled 170mm top orange fan with white LED.
    Preinstalled 120mm front and rear orange fans with white LED.
    RPM speed control knobs for six fans.
    Back window for easy CPU cooler back plate.
    Back holes and clips for cable management.
    Anti-vibration rubber for PSU.
    Dust filter for PSU cooling fan.
    Tool-free holder for bottom 14cm fan.



____________________

Also i'll try and run without crossfire as Opsamk said,
Pages: [1]
  Print  
 
Jump to:  

Sponsored by , a Bitcoin-accepting VPN.
Powered by MySQL Powered by PHP Powered by SMF 1.1.19 | SMF © 2006-2009, Simple Machines Valid XHTML 1.0! Valid CSS!