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| Asus 5870 E6 - CFX or connecting displays to 2nd card https://www.wsgf.org/phpBB3/viewtopic.php?f=66&t=21886 |
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| Author: | Falke [ 15 Apr 2011, 09:28 ] |
| Post subject: | Asus 5870 E6 - CFX or connecting displays to 2nd card |
Good Morning, i now proudly own 2 Asus 5870E6 (i know the 6970 would have been better, but i wanted to try and it was cheaper to buy a 2nd than one 6970) At the moment i connected my 3 displays to the first card, and enabled crossfire. So at the moment i see not a huge performance gain, 10 FPS in RIFT, from 35 to 45. After enabling AF 8x and AA 4x i am where i have been before getting the 2nd 5870E6. about 35 fps but, before the first card got about 69-72°C. After the first is about 79°C (what should be normal, cause the intake of the fan on top of the card is blocked by the second) and the 2nd is about 58°C. So my idea was, why not plugging a monitor on the second card, eyefinity should work to, and finally both cards should be more balanced in heat? Or any other suggestion? I am asking before i try out, cause i dont want to have trouble, never change a running system :) Thanks alot for any advise. EDITH: SORRY WRONG FORUM, pls change... thnx |
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| Author: | Delphium [ 15 Apr 2011, 10:16 ] |
| Post subject: | Re: Asus 5870 E6 - CFX or connecting displays to 2nd card |
Unfortunately eyefinity groups do not currently span multiple cards, so you will need to keep the 3 displays connected to the singe card. Even when using CFX you cannot span eyefinity across the cards. Do you have spare PCI-E 16x slots which you could move the 2nd card down an extra notch? You could pickup longer CFX ribbons if your current CFX bridge does not reach. |
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| Author: | Falke [ 15 Apr 2011, 11:59 ] |
| Post subject: | Re: Asus 5870 E6 - CFX or connecting displays to 2nd card |
hum, 3 x PCIe 2.0 x16 (at x16/x16/x4 mode) 1 x PCIe x1 2 x PCI http://www.asus.com/Motherboards/Intel_Socket_1366/P6T_SE/#specifications this means i could use the last slot? Are those ribbons all the same? i can find 73mm crossfire bridges, well ill give a try with those 2 i got. dont know if they are long enough. |
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| Author: | Delphium [ 15 Apr 2011, 12:57 ] |
| Post subject: | Re: Asus 5870 E6 - CFX or connecting displays to 2nd card |
You could use the PCI-E 16x (4x mode) slot, that should help the cards keep cooler. Your motherboard uses PCI-E 2.0, so 4x lanes will provide 2GB/s bandwidth which should be enough for the 5870, with about a 10% drop in performance. You can see some benchmarks here of the 5870 and how it scales with 16x, 18x, 4x, and 1x pci-e(2.0) lanes. http://www.techpowerup.com/reviews/AMD/HD_5870_PCI-Express_Scaling/13.html |
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| Author: | Falke [ 15 Apr 2011, 13:00 ] |
| Post subject: | Re: Asus 5870 E6 - CFX or connecting displays to 2nd card |
Thanks alot. I will give it a try and report back. :rockout |
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| Author: | Paradigm Shifter [ 15 Apr 2011, 13:20 ] |
| Post subject: | Re: Asus 5870 E6 - CFX or connecting displays to 2nd card |
Moved to relevant forum. Also, I swapped my second GTX460 from the second PCI-E slot to the third with no drop in framerates, but a 25*C drop in temps on the first card, which wasn't getting enough cool air butted right up against the back of GPU2. It dropped temps on GPU1 in Surround gaming from 96*C ( :shock: ) to 71*C, which is a lot better. |
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| Author: | BHawthorne [ 15 Apr 2011, 18:13 ] |
| Post subject: | Re: Asus 5870 E6 - CFX or connecting displays to 2nd card |
So my idea was, why not plugging a monitor on the second card, eyefinity should work to, and finally both cards should be more balanced in heat? A few basic concepts to cover of why the temps are the way they are. First when you sandwitch the cards to gether like that the one with the air intake less restricted will have better temps. Secondly, your temps are rather normal. You have nothing you need to adjust for. Anymore it's standard for cards to re rated to up to 100C before they self-throttle down. Your temps are nothing outside of normal. I don't get the logic of wanting to raise the temp of the second card to be in line wiht hte first? All you're doing is just generating more heat. You're overthinking things. If you have a long enough Crossfire flexible bridge just set your card slot spacing wider. |
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| Author: | Falke [ 20 Apr 2011, 12:33 ] |
| Post subject: | Re: Asus 5870 E6 - CFX or connecting displays to 2nd card |
Well i didnt know that 100°C is the top of heat without damage. Well the "getting the 2nd card as hot as the first" is due to my mothertongue sorry, in fact i mean i like to try to get the first one as cool as it was before plugging in the 2nd. I changed 2 fans and i am waiting for 91mm CFX cables, so that i finally can mount on #1 and #3 :) I was concerned cause i had the first hours about 80°C on card #1 and it was causing trouble with stutterung graphic and sound, so that i thought it was due to heat. since opening the case everything is fine, card #1 is now hitting 76°C. I think cooler card will live longer, and on the other side i am ..... ergh what do they do in "tooltime". i lack the english word... ergh oh. i think you know what i mean. |
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| Author: | BHawthorne [ 21 Apr 2011, 22:36 ] |
| Post subject: | Re: Asus 5870 E6 - CFX or connecting displays to 2nd card |
Well i didnt know that 100°C is the top of heat without damage. True that the cooler the better, but 80C shouldn't be the cause of any stuttering graphics and sound. I'd look to other issues causing it. Possibly a driver conflict of some sort. |
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| Author: | Falke [ 06 May 2011, 14:01 ] |
| Post subject: | Re: Asus 5870 E6 - CFX or connecting displays to 2nd card |
Ok, changed to #1 and #3, not as cool as before but both temps the same (but still 80C), no stuttering no problem, everthing works. 100% solved Thanks alot! :rockout With high (not ultra) settings stable 35 FPS FFXIV Screenshots RIFT Screenshots |
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