Radeon 5850 overclocking problems

scratchy42 · 20 Nov 2011 at 17:04

Hi

I'm going to get MW3 and Assassin's Creed Revelations when it comes out, so I thought I would try and get more juice out of my MSI Radeon 5850 Twin Frozr. I've already got a mild overclock of 800Mhz core and 1120Mhz memory, which I've been playing F1 2010 and Assassin's Creed 2 on with no issues. I used MSI afterburner and furmark and over clocked the core first to 870Mhz and then the memory to 1180Mhz, with no issues at all. Furmark was set to 1024x768, xtreme burn mode, post fx on and no aa. But both games didn't like these settings one bit and crashed the driver straight away. By the way I'm running 11.10 driver only, no ccc.

I've seen guys getting stable overclocks way higher than that so any ideas? I don't want to upgrade the card yet as I'm hanging on for 7000 series.

Full spec OCZ Mod xstream pro 600w, Giga-byte MA790XT-UD4P, AMD Phenom X3 720 @ 3.1Ghz, 4GB OCZ OCZ Platinum DDR3 PC3-10666C7, Western Digital 320GB HDD.

koooowweeee · 20 Nov 2011 at 17:25

Have you raised the volts

im not sure how you do it on ati cards but can't be that hard.

When you find out if you don't know tell me and ill do it to my 5850 on my second computer

edit: on my other computer now and looked at what i clocked it to.

core 875 mem stock

thats as high as it goes i think on stock volts. never really messed with it that much. think i tried 890 and it crashed

atomic7431 · 20 Nov 2011 at 17:55

ive been messing with my saphire 5850 as well recently and ive got the core at 899mhz and the memory at 1200mhz and i cant change the volts so all stock volts, been running bf3 and 3dmark 2011 and unigine and touch wood all seems fine so far!

koooowweeee · 20 Nov 2011 at 17:58

been googling and most of these cards you cant unlock the voltage without i bios flash

atomic7431 · 20 Nov 2011 at 18:03

yeah i see something about flashing the bios but im not going near that lol

koooowweeee · 20 Nov 2011 at 18:06

when i have time ill give it a go. flashed a few cards.

last card was a gtx460 with the fan speed set to either 30 or 40 % at idle and i could hear it so flashed it to 20% lol nice and quiet now

atomic7431 · 20 Nov 2011 at 18:11

I know what you mean with the noise issues, when i have the fan speed up on this its like is gonna take off......

koooowweeee · 20 Nov 2011 at 18:16

use smart doctor. you can set the volts then.

just trying to work out how to do it with msi after burner

smart doctor looks like the skin has not been updated since window 95

edit: testing at 900 core

edit 2: smart doc only goes up to 900 core. so thing you have to have msi open as well. clock with that and up the volts with smart doc. there must be a better way. anyone?

scratchy42 · 20 Nov 2011 at 18:21

I'm able to change the volts in afterburner but dont really know what I'm doing with that side of things so I've never touched it. It's showing 1164mv at the moment, what do u think I should put it up to, with 870/1180??

koooowweeee · 20 Nov 2011 at 18:27

not sure mine does 875 with 1.143 as stock. just went to 1.15 for 915 i must have a good card for once in my life

elrasho · 20 Nov 2011 at 18:27

To the OP ever thought of getting another 5850 and crossfiring?

gurusan · 20 Nov 2011 at 18:33

I run mine 1.25V for 975MHz, requires 1.3 for 1GHz. Mine seems to be pretty volt hungry as I've seen other people get 1GHz on just a tad over 1.2V

koooowweeee · 20 Nov 2011 at 18:42

at the moment im testing 1000/[email protected]

said to myself i wasnt going to clock this machine much.

you got me started now lol

scratchy42 · 21 Nov 2011 at 10:28

thanks for all the suggestions, I'll have a go at upping the voltage a bit tonight and see what happens.
elrasho - Yeah I have been thinking recently about getting another 5850 but it will have to be second hand wont it? Don't see any new ones out there. Would my xstream 600w psu take two cards though?

elrasho · 21 Nov 2011 at 13:25

scratchy42 said:
thanks for all the suggestions, I'll have a go at upping the voltage a bit tonight and see what happens.
elrasho - Yeah I have been thinking recently about getting another 5850 but it will have to be second hand wont it? Don't see any new ones out there. Would my xstream 600w psu take two cards though?

Post a link to your psu and ill see

scratchy42 · 21 Nov 2011 at 13:40

I don't see it in the store and obviously can't link to anyone else. But it's an OCZ Mod Xstream 600w.

elrasho · 21 Nov 2011 at 14:14

Yep that should fine. I have a Corsair HX620W and it pulls 400W under load using both cards. What motherboard have you got? We have to make sure both PCIE slots will run at 8X under crossfire.

scratchy42 · 21 Nov 2011 at 14:38

Giga-byte MA790XT-UD4P, I'm pretty sure this does 8x crossfire. Is my only option to get another 5850 to go second hand though?

scratchy42 · 21 Nov 2011 at 14:39

BIOS on the motherboard is flashed to F8 which is the last one to be released.

elrasho · 21 Nov 2011 at 14:53

You motherboard is fine:

1 x PCI Express x16 slots, running at x16 (PCIEX16_1)
1 x PCI Express x16 slots, running at x8 (PCIEX8_1)

Which means the PCIE slots will run at 8X under Crossfire

Yes get a second hand one, some shops sell them new but for £160 as they are hard to get new. I sold one for £80 in MM which is about the going rate. You'll see a massive performance increase (I saw literally double in my benchmarks and FPS in games!).