Topic: how to keep 4 close by graphics cards cool? (Read 3004 times)
Not if done adroitly.
The PCIE spec dictates up to 1.5cm freeplay or something like that. Use spacers:
http://ck.kolivas.org/pictures/Mining/IMG_1240.JPG
http://ck.kolivas.org/pictures/Mining/IMG_1240.JPG
this won't harm the graphics card?
The PCIE spec dictates up to 1.5cm freeplay or something like that. Use spacers:
http://ck.kolivas.org/pictures/Mining/IMG_1240.JPG
http://ck.kolivas.org/pictures/Mining/IMG_1240.JPG
I actually use the XF bridge to make the cards even if that make sense O.o
Not at all. :-/
I actually use the XF bridge to make the cards even if that make sense O.o
+1, There is no hash rate impact (positive or negative) with crossfire enabled. However, there is quite a bit higher CPU usage when crossfire is enabled, so that means more power used.
Odd. I've never seen one... 
I'm confused why people think that running in Crossfire lowers mining performance. I don't know who started that rumor, but it's the same unless you are gaming while mining (even then, it's almost a wash). I've ran some 5870s, some 6870s, and some 7970s in Crossfire now in my gaming rig and the performance is identical to my dedicated rigs.
If this is a dedicated rig, there's no reason for the Crossfire bridges. It's not hurting anything though (in Windows... I can't vouch for the Linux driver behavior with Crossfire).
+1, There is no hash rate impact (positive or negative) with crossfire enabled. However, there is quite a bit higher CPU usage when crossfire is enabled, so that means more power used. If this is a dedicated rig, there's no reason for the Crossfire bridges. It's not hurting anything though (in Windows... I can't vouch for the Linux driver behavior with Crossfire).
I'm confused why people think that running in Crossfire lowers mining performance. I don't know who started that rumor, but it's the same unless you are gaming while mining (even then, it's almost a wash). I've ran some 5870s, some 6870s, and some 7970s in Crossfire now in my gaming rig and the performance is identical to my dedicated rigs.
If this is a dedicated rig, there's no reason for the Crossfire bridges. It's not hurting anything though (in Windows... I can't vouch for the Linux driver behavior with Crossfire).
If this is a dedicated rig, there's no reason for the Crossfire bridges. It's not hurting anything though (in Windows... I can't vouch for the Linux driver behavior with Crossfire).
Get rid of those crossfire cables and wedge the cards apart with cardboard or similar material.
Or, get a thin piece of steel and drill holes along it and use small nuts & bolts to space the cards apart using the default fixing holes in the gpus (That's what I do)
Some people will tell you it damages the pcie slot on the mobo but I have been running mine for a good 6+ months and no problems at all.
Or, get a thin piece of steel and drill holes along it and use small nuts & bolts to space the cards apart using the default fixing holes in the gpus (That's what I do)
Some people will tell you it damages the pcie slot on the mobo but I have been running mine for a good 6+ months and no problems at all.
why do I need to get rid of crossfire cables?
Get rid of those crossfire cables and wedge the cards apart with cardboard or similar material.
Or, get a thin piece of steel and drill holes along it and use small nuts & bolts to space the cards apart using the default fixing holes in the gpus (That's what I do)
Some people will tell you it damages the pcie slot on the mobo but I have been running mine for a good 6+ months and no problems at all.
Or, get a thin piece of steel and drill holes along it and use small nuts & bolts to space the cards apart using the default fixing holes in the gpus (That's what I do)
Some people will tell you it damages the pcie slot on the mobo but I have been running mine for a good 6+ months and no problems at all.
why do I need to get rid of crossfire cables?
Get rid of those crossfire cables and wedge the cards apart with cardboard or similar material.
Or, get a thin piece of steel and drill holes along it and use small nuts & bolts to space the cards apart using the default fixing holes in the gpus (That's what I do)
Some people will tell you it damages the pcie slot on the mobo but I have been running mine for a good 6+ months and no problems at all.
Or, get a thin piece of steel and drill holes along it and use small nuts & bolts to space the cards apart using the default fixing holes in the gpus (That's what I do)
Some people will tell you it damages the pcie slot on the mobo but I have been running mine for a good 6+ months and no problems at all.
100C is FUD unless you plan on keeping the cards for 2-3 months...
what's to worry about? 70C is very cool. if you don't hit 100+C, then i wouldn't be worrying.
PCI-e extenders - that is all 
Pretty much or ditch the case and put wedges of paper or whatever between the cards.
I have 130cfm scythe kazes I can use. but my case is standing up and not laying down. how can I use those fans? zip tie them to the cards?
I have this exact config sorta. 4 5850s in a case and a scythe zip tied right behind them. it keeps the temps in the mid to low 70s.
PCI-e extenders - that is all
I need help cooling my 6870s
They are running in the upper high 70 degrees (77-80s C)
This is an open case rig with CM Storm Trooper.
Also keep in mind that this is COLD air being blown into the cards from outside ... I don't know why they're still hot. Autofan with CGMiner 85% fan speed
Here are some pics:
They are running in the upper high 70 degrees (77-80s C)
This is an open case rig with CM Storm Trooper.
Also keep in mind that this is COLD air being blown into the cards from outside ... I don't know why they're still hot. Autofan with CGMiner 85% fan speed
Here are some pics:
I have two 12cm 110cfm Coolermaster fans in front of them. The fans are held in place with cable ties. The fans are on top of each other - the bottom fan cools the two graphics cards at the bottom and the top fan cools the two graphics cards at the bottom. Works for me. But don't waste your time with 70cfm fans or something puny like that. Make sure they have in excess of 100cfm, each.
I have 130cfm scythe kazes I can use. but my case is standing up and not laying down. how can I use those fans? zip tie them to the cards?
I need help cooling my 6870s
They are running in the upper high 70 degrees (77-80s C)
This is an open case rig with CM Storm Trooper.
Also keep in mind that this is COLD air being blown into the cards from outside ... I don't know why they're still hot. Autofan with CGMiner 85% fan speed
Here are some pics:
They are running in the upper high 70 degrees (77-80s C)
This is an open case rig with CM Storm Trooper.
Also keep in mind that this is COLD air being blown into the cards from outside ... I don't know why they're still hot. Autofan with CGMiner 85% fan speed
Here are some pics:
I have two 12cm 110cfm Coolermaster fans in front of them. The fans are held in place with cable ties. The fans are on top of each other - the bottom fan cools the two graphics cards at the bottom and the top fan cools the two graphics cards at the bottom. Works for me. But don't waste your time with 70cfm fans or something puny like that. Make sure they have in excess of 100cfm, each.
between 70 & 80 degrees C is what mine run at... I have 3 AMD 5970's running right now.
Yikes. There's barely any room there for the cards to get any airflow. Be glad you're getting high 70's (which isn't horrible at all, BTW).
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