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5870 problem [POSSIBLY SOLVED]

I have noticed my psu running fairly hot though even at idle now. I can feel the heat and the fan isn't spinning up to compensate.
 
Jay 85 > HX 650 > FOR ONE 5870 > DO NOT USE MOLEX PCI-E CONNECTORS > YOU HAVE 4x6+2 pci-e connectors dedicated for 2xGPU's on the HX650.
 
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Right to elimate for things I tried firing up the 5870 with my corsair again and out of 6 tries it managed todisplay twice! Now this is using the molex to 6 pin comnectors and so far the pci 6pins have managed to fire it up twice and so has the molex to 6 pin. BUT as soon as I reboot, there is no display again. Its asif there is not enough power being delivered quick enough. On my cheapo psu that I tried it firedup everytime without fail. Also the card will only fire up if I turn it off at the mains and wait for the mobo light to dissappear. Switch it back on and it sometimes fires up though not always
 
And btw this was booted up with the full 8 gigs of ram.

Motherboard has the latest bios update already so that can't be it.
 
sounds like the voltage going to the ram to me... have you tried upping the voltage to the memory? If using all 4 slots most boards will still put 1.8v to 2v through the dimms but most dimms if filling all four slots will need 2.1v.

For me to get all 4 sticks of memory and my 5850 booting consistently i need to set my memory @ 2.2v... Just a suggestion but worth a look?
 
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What happens if you try to run the whole rig at stock setting with 8 gigs of ram so cpu at 3.2 ram on auto etc etc reason i ask is adding gfx cards can make rigs unstable i went from a 5770 to 5850 now with the 5770 i could run prime 95 for hours on end when i put my 5850 in then i could prime for about 20 seconds before failing, this is with a corsair HX750 even at full load running prime and furmark at the same time only hitting into the 400 watts range at the wall.

Try again with 8 gigs at auto settings and see what happends
have you tried increasing pci-e frequency to 101 Mhz (sometimes helps cure funny problems)

I don't think it will be the PSU

Just do the paperclip test run the mobo off el cheapo and the gfx of the corsair then do vice versa, paperclip test is perfectly safe or you can buy a 24 pin block that you push on the end which eliminates the paperclip but ultimately does the same thing.
 
VinceB1 said:
sounds like the voltage going to the ram to me... have you tried upping the voltage to the memory? If using all 4 slots most boards will still put 1.8v to 2v through the dimms but most dimms if filling all four slots will need 2.1v.

For me to get all 4 sticks of memory and my 5850 booting consistently i need to set my memory @ 2.2v... Just a suggestion but worth a look?
Click to expand...

Depends on the ram i would go putting 2.2v through any ram i would check the specs if it's dominator they can take 1.8.19 max any more any yellowbeard said they need to be highly cooled or they could fry
 
Guys my computer is posting, its not like its not getting past the post stage. It's just like it seems there isnt enough power going around to the graphics card.

I have the 5870 booted up right now and running with the corsair but as soon as i reboot it will have no display again! I have to turn off the power and wait for the mother board light to go out and wait about 2-3 mins then power back on and wollah we have display again. Surely its a power thing and not memory timings?


I changed my DRAM and memory clock settings, it was set to Manual by default at 400mhz?? so i set it to Auto and left the voltages alone because i've done no research with that as of yet.


The RAM i am using is Crucial Ram 1333hz. Not sure what serial number etc as i need to take one out to find out.

What i dont get is, if i use my cheapo psu and not my corsair it will fire up everytime with 4 gigs of ram but if i add another 2 gigs it struggles to power up then gives up. If i have 8 gigs of ram in it doesnt fire up the display at all and just sets the graphics fan to max as in no power sorta thing.

Any ideas?
 
oh and is set my PCIe speed to 101 and it did nothing either, changing the memory DRAM from 400mhz to auto did nothing either. I have yet to change the memory voltage.
 
I am running crysis right now on enthusiast with full AA x8 at 50fps! amazing! Everything is running fine but like i said as soon as i reboot it will have no display and graphics fan will spin at full. The computer will post and load windows though, just no display.

Starting to think it might be memory voltage... currently set to auto or 1.5v by default.

Upload pictures soon...
 
memory.jpg

memoryspeed.jpg

cccoverdrive.jpg

CCCinfo.jpg

amdoverdrivememory.jpg



Hope this helps...


BTW i'd like to thank everyone who has helped me with this since day 1. I greatly appreciate it, beers on me if i ever meet you guys.
 
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Just had a look and crucials site puts your ram at 1.5v so this is about right. My deafult for ddr2 is 2.1v, but I have to run at 2.2v to get mine stable across the four slots (4x1gb dimms). It could be that your board is undervolting across the 4 slots but more than likely not.

What board do you have out of interest?


edit: Ahhh... have just looked at your board on the asus site and these might be of interest:

bios

M4A785T-M BIOS 1005
Improve system stability.

M4A785T-M BIOS 1002
Fix the issue that system may take a long time to resume from S3/S4 when enable ACC and open AOD.

I would check what bios you have and go from there. It looks like there has been power issues with the board in certain conditions so I would wack the latest bios on for good measure. Its funny as I also had to do this with my dfi board which was shipped with a bios that didn't fully support my chip, it worked but was never fully stable until I flashed it way back in 2008.
 
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Hi vince, i have flashed my bios to the latest 2201 and it hasn't resolved the matter at all.

I did another little test tonight, i figured that my corsair psu would only run the graphics card if i turn off the power supply and pull out the cord wait about 3-5 mins and wait for motherboard light to go out then replug the power cord to the psu and turn it on and it will power the 5870. Sometimes the fan spins up fast then slows down, sometimes it just spins up to idle speeds and stays that way throughout until i start playing crysis or something.

I also tried this exact same method with my PCI 6 pin cables and i got no display on post, the fans just spin at max BUT my computer is still posting and logging into windows like usual, its just i can't see it because of no display but i can hear the windows sound.


What does this tell me?


If my board is undervolting then surely it wouldn't post and go into windows even if the graphics card isn't displaying?


Finally, what should i up my crucial ram to? You're stating 2.2v for you ddr2 so should i try 2.1v? Do i do this via bios and setting the overvoltage to 2.1v?
 
Jay85 said:
Hi vince, i have flashed my bios to the latest 2201 and it hasn't resolved the matter at all.

I did another little test tonight, i figured that my corsair psu would only run the graphics card if i turn off the power supply and pull out the cord wait about 3-5 mins and wait for motherboard light to go out then replug the power cord to the psu and turn it on and it will power the 5870. Sometimes the fan spins up fast then slows down, sometimes it just spins up to idle speeds and stays that way throughout until i start playing crysis or something.

I also tried this exact same method with my PCI 6 pin cables and i got no display on post, the fans just spin at max BUT my computer is still posting and logging into windows like usual, its just i can't see it because of no display but i can hear the windows sound.


What does this tell me?


If my board is undervolting then surely it wouldn't post and go into windows even if the graphics card isn't displaying?


Finally, what should i up my crucial ram to? You're stating 2.2v for you ddr2 so should i try 2.1v? Do i do this via bios and setting the overvoltage to 2.1v?
Click to expand...

I wouldn't go for 2.1v through that ram, my ddr2's default is 2.1 and I overvolt by 0.1 up to 2.2v. Since your ddr3 is 1.5v as standard 2.1v would be way over the top voltage wise.

The hx650 should easily power your rig so I don't think it's that but have you got a different supply to test with? Also have you tried both DVI's and a different cable... its a long shot but it looks like you have covered almost every base.
 
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Dont have a different dvi cable to test with but i have tested both ports. Can't use the hdmi ports because the monitor has no hdmi in.

I have tested with a cheaper Evo labs 750W power supply and that fires up the card everytime without fail, but the power supply does whine and squeal a lil bit as though it is struggling to deliver the power.

What does that say?
 
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