Off-Topic Thread

I sold one of my 7850s last week and the buyer is having trouble with it now. He's crossfiring it with his existing Sapphire 7850 and is getting artifacts in Heaven.

So far we've tried just the new card with fresh install of 13.12 drivers. Stock clocks on core and mem and stock voltage. He says he's getting artifacts in the last scene 26/26 of Heaven.

I never had any trouble with the card in the 7 months I had it. It was happily running OC'd to 1100/1225 and never a problem.

Artifacts are usually a memory problem yea? If he lowers the or increases the frequency would that help?

Any ideas what else to try?

Good point, will find out, which would explain artifacts in the final scene. Although the cooler on those HIS 7850s is a really good non ref blower style cooler so unless the airflow in the case is poor ... ?

Hey guys,

..Brian.. wrote: »

I sold one of my 7850s last week and the buyer is having trouble with it now. He's crossfiring it with his existing Sapphire 7850 and is getting artifacts in Heaven.

So far we've tried just the new card with fresh install of 13.12 drivers. Stock clocks on core and mem and stock voltage. He says he's getting artifacts in the last scene 26/26 of Heaven.

I never had any trouble with the card in the 7 months I had it. It was happily running OC'd to 1100/1225 and never a problem.

Artifacts are usually a memory problem yea? If he lowers the or increases the frequency would that help?

Any ideas what else to try?

So, yeah, I was running 14.1 beta on my Sapphire 7850. I ran with an OC of 1100mhz/1.4mV/1300mhz for months with no issue. The cooler on this card can keep it below 60°C at all times, even after a couple hours on full tilt. No problems there.

When I received the card from Brian yesterday, I switched my own Sapphire to the lower PCI-E slot and installed the HIS in the top slot. I have a number of HDDs and an SSD so these physically prevented me from installing the larger HIS in the lower slot. I was in a rush to get the card up and running so didn't give it a second thought, I didn't think I would have heat issues and on the off-chance I did, I could relocate the HDDs another day and move the HIS down to the lower slot.

I booted the machine up anyways and enabled crossfire, catalyst was seeing stock 7850 clocks and a voltage of 1213mV for the HIS, that's not right AFAIK. It detected my own Sapphire correctly, however. I tried a run of heaven and the card started to artifact some of the way through so I stopped it immediately (1080p fullscreen btw). I didn't want to mess with the card too much seeing that the voltage seemed incorrect to me, but I did apply a small OC to core to bring it up to my 7850 clock speed. No dice.

I figured something definitely wasn't right so I decided to go back to 13.12 drivers. I rebooted in safe mode and started up DDU(Display Driver Uninstaller) and ran through the uninstall process.

Now on 13.12, I tried some BF4 and it crashes after about 10 minutes, same in BF3. Heaven ran almost until the end and began artifacting on the last scene.

Wossack wrote: »

how are the temps? used to get artifacts from an overheating 4800 series card

I really don't think heat is an issue, unless it's the VRM or something. The HIS was tipping along grand at ~60°C in heaven and then started artifacting toward the end. It seems like it's more down to it not correctky detecting the card (stock settings).

BF4 was similar, no noticeable rise in gpu temps at all. I have logs from afterburner to refer to and all temps are fine/acceptable.

I thought then that it was possibly a power issue so I lowered my cpu OC from 4.7ghz down to stock just to see. AFAIK my psu should be good for an OC 8350 and 2 x 7850s - I have a Corsair TX-750M. No change there after downclock, same results, artifacting again.

I think my airflow is ok, I have an Antec 900 with 2 x120mm front intakes, 140mm top exhaust, a Corsair H-70 exhausting to the rear of the case and a 120mm side fan which has been moved from it's original position due to interference with my old 6950. Cpu never gets above 60°C @4.7ghz and neither does my (Sapphire) Gpu.

Now, I'm not a hardware noob but I am a crossfire noob Maybe I should have removed all drivers, installed first (top) card, installed drivers, install second card, enabled crossfire... I'm still not certain how this should be done.

I am going to completely wipe the drivers (again) this evening so what is the best approach to take here for a fully clean graphics driver install? I don't mind switching or removing card if you think that will help.

Cheers

Hopefully the guys will be able to give you some more ideas. Re the positioning, I had it the same, the HIS on top and a Sapphire on bottom. My reasoning was the HIS cooler, being longer, will will have better access to fresh air.

just to qualify, the 4800 series card I mention above, wasn't automatically ramping up its fan, so was hitting 90 degrees+

Burgo wrote: »

ddk

world famous for his cameo in the post-credits of It's Pekka 2 :P

(the greatest frag movie of all time)

unfortunately it's not available on any streaming sites, so these will have to suffice
quake 3 cpma

tf2 6v6

csgo @ dreamhack

css bhopping


woo old school shooters

...1.6... Brian we need to talk.

He's not doing to bad with faceit it must be said. Hosts all the csgo and ql.

..Brian.. wrote: »

Glad we're making progress! And you're syncing them in option in Afterburner? That's how I OC'd them.

Had another crash there a while ago at stock in BF4. Artifacting and then black screen.

I tried overclocking with afterburner and trixx, same results. But crashing at stock is surely not good, maybe it's just BF4 but I won't really have time to test anything else until the weekend.

With sync set to on in afterburner, I assume that it will apply the same voltage to both cores? I don't think mine will take more than 1040mV, that said, setting both separately with sync off had the same results.

BloodBath wrote: »

Have you got the latest drivers and crossfire profiles?

I'm using 13.12. I was under the impression that CAP was now integrated into Catalyst.

..Brian.. wrote: »

Bump up the voltage and see if that helps. I can't remember whats voltage I had them on unfortunately and if I recall correctly it is advised to keep them synced in afterburner which syncs both clocks and volts.

Well, that's the thing. Afterburner is seeing the HIS voltage as 1213mV, whereas if I use Trixx it sees the voltage as 1075. The voltage on my Sapphire is only around 1045mV so if it is trying to sync both cards to 1213mV then this could well be the butt of my problems. 1140mV on the Sapphire would take me to ~1140mhz, 1.2V is just overkill for that card.

So, I'm just not sure. It's nice to use afterburner for logging stats but I think I might just take it completely out of the equation (i.e., don't even open it) this evening and see how I get on.

About the CAP, they are integrated now, no? I can't seem to find any for download online!?

Also reading about possible issues with PCI connectors that the 4to6 pin adapters fixed(try using connectors that came with card). Probably not going to do anything but worth ruling out.

You mean the Pci-E power connectors? The 2 I am using on the HIS are directly wired into the PSU. The one for the Sapphire is a modular cable that came with the PSU. I can try using a molex>6pin if that's what you mean, but I would have thought the way it is done now was ideal. If you think it's worth a shot I'll try it this evening.

Cheers.