Message boards :
Number crunching :
Setting up s GPU's
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Send message Joined: 8 Mar 08 Posts: 17 Credit: 4,411,459 RAC: 0 |
I have tried searching the forum for an answer to this, but as yet i haven't found anything which can help me. Scenario: Vista x64 2 x HD4850's (Single Cards) Drivers installed and files copied Latest MW application being used (v.f by Gipsel) The problem is that i can crunch fine on the 1 card, however when the 2nd card is in, BOINC won't crunch on it (GPU-Z reports seeing both cards). I plugged in a DVI->VGA adapter into the back of the second card to hopefully fool it into thinking that a cable is plugged in (although I'm not sure if that will be enough resistance). Is that the problem, or have i missed something which is making the 2nd GPU not work correctly? Thanks to anyone with any input on this. Confused cruncher... |
Send message Joined: 24 Dec 07 Posts: 1947 Credit: 240,884,648 RAC: 0 |
I have tried searching the forum for an answer to this, but as yet i haven't found anything which can help me. You need to set up BOINC so it thinks it needs to crunch MW all the time. With my 2 cards, if MW hasn't got enough debt, I see BOINC using only one card until enough debt builds up that it needs to use it to satisfy the debt requirement. So set up BOINC with a high MW resource share. I use atleast 50% overall. |
Send message Joined: 21 Feb 09 Posts: 180 Credit: 27,806,824 RAC: 0 |
That's not his problem GG - just that MW is crunching on one card only, not that BOINC is not getting enough work. Ben: Use Cat 8.12 Disable crossfire Use dummy plug. (or extend the screen and make second screen primary monitor, as detailed here) GPU-Z should show both as crossfire disabled, and both working 70%+ No special config should be needed for app_info.xml Also, for the record, GPUs doesn't have an apostrophe, unless you are describing a feature, e.g. the GPU's colour. Same goes with CPUs, DVDs, TVs, PCs. </grammar> |
Send message Joined: 26 Jan 09 Posts: 589 Credit: 497,834,261 RAC: 0 |
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Send message Joined: 4 Jul 08 Posts: 165 Credit: 364,966 RAC: 0 |
"Picky Picky Picky" |
Send message Joined: 21 Feb 09 Posts: 180 Credit: 27,806,824 RAC: 0 |
"Picky Picky Picky" See it too often (I visit too many PC forums) and it's basic English at the end of the day. Thanks, borandi. It needed to be said. I currently admin a one-month old facebook group of 38500 fans on this, spelling and grammar. Maybe I take it too far, maybe I just get annoyed easily, maybe I want people to 'lern the write way 2 spel'! =D Unfortunately, as many of us as there are out there wanting to correct, there's ten others who really couldn't care less. |
Send message Joined: 26 Jan 09 Posts: 589 Credit: 497,834,261 RAC: 0 |
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Send message Joined: 8 Mar 08 Posts: 17 Credit: 4,411,459 RAC: 0 |
That's not his problem GG - just that MW is crunching on one card only, not that BOINC is not getting enough work. I have been using Catalyst 9. something for a little while now and it seems to work fine, however if it defiantly causes problems with using dual gpus then i will roll back. When i installed the cards i didn't have a crossfire cable to link the cards, which is OK as i have read somewhere that you couldn't use them (just like CUDA in dual configuration). GPU-Z reports crossfire is disabled. I still wonder if the DVI -> VGA converter in the back of the 2nd card is not fooling it into thinking it has actually got a cable stuck in the back. Anyone got some good links for a dummy plug? |
Send message Joined: 21 Feb 09 Posts: 180 Credit: 27,806,824 RAC: 0 |
My 4850X2, or 2x 4850 setup, uses Cat 8.12 no probs (the 4850X2 requires Cat 8.12 from Sapphire itself, as ATIs 8.12 on its own doesn't work). As for a dummy plug: http://www.overclock.net/overclock-net-folding-home-team/384733-30-second-dummy-plug.html You need the resistors. Just a DVI <-> VGA plug on its own doesn't do it. |
Send message Joined: 4 Jul 08 Posts: 165 Credit: 364,966 RAC: 0 |
Fair "enuf" mate, he he...Know what your saying it does get hard at times to decipher what has been written... By the way good job on setting up the "destructions" for the ATI cards, should make life a little easier |
Send message Joined: 8 Mar 08 Posts: 17 Credit: 4,411,459 RAC: 0 |
My 4850X2, or 2x 4850 setup, uses Cat 8.12 no probs (the 4850X2 requires Cat 8.12 from Sapphire itself, as ATIs 8.12 on its own doesn't work). Ah cheers. Thought that might be the problem! D'oh |
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