How to overclock a 7850 past 1050MHz?

[joelk2]

My Gigabyte 7850 OC goes to 1130/5400 stable with 52C peak. Benches better tha a 7870 stock. So I'm happy

are you altering the voltages?

 

[deepbroca]

My 7850 MSI Power Edition (Twin Frozr IV) is quite happily overclocked at 1200Mhz core at 1.2V and idles at 300Mhz, with the memory clock running at the stock 1200Mhz.

But when I raise the memory clock at all, even 1 Mhz, whilst keeping my core OC'd at 1200Mhz, my card's idle speed raises to 400Mhz instead of 300Mhz as it was before.

I would prefer my card to idle at 300...is there anyway to raise the memory clock whilst keeping the idle core clock down?

 

[OctopusX]

are you altering the voltages?

These are the settings I'm using without any issues:

 

[joelk2]

These are the settings I'm using without any issues:

Thanks, will give this a go.

you tried this on games etc without any problems?

 

[joelk2]

do i have to disable ccc or anything like that?

in ccc i can put gpu to 1950MHZ
Memory to 2400MHz
etc.

amd overdrive?

 

[wesimmo]

I've got a weird issue with my R7850s Twin Frozrs, which i think is causing me issues with my overclock.

I've got them in XFire with "Synchronise Settings...." ticked.

When i put one card in the first PCI slot Afterburner will only allow me to set the voltage to 1.138. I can set the Power Limit to +20 though.

When i do that card 1 pulls 1.138 but card 2 pulls 1.210 as seen through the Afterburner Applet on my G15 keyboard.

I then swap the cards round and Afterburner will let me set the voltage to 1.210, but now card one pulls 1.210 but card 2 still only pulls 1.138.

I've also swapped the PSU cables round so it's not them, it's not the drivers and it's not the PCI slot, so it must be something with the cards that is different?

The only thing i can see is that the card that will take 1.21 has got Bios 015.017.000.000 whereas the other one has got 015.021.000.000.

Is it a faulty card?

edit:

I just removed Afterburner and Installed GPU Tweak.

When i check the card info in there there are also other differences.

The higher voltage card has got

Pixel Fillrate - 33.6
Texture Fillrate 67.2

The lower voltage one has got

Pixel Fillrate - 28.8
Texture Fillrate 57.6

 

[OctopusX]

Thanks, will give this a go.

you tried this on games etc without any problems?

I play BF3 with these settings and it's stable with temps reaching 51-52C max.
Fan goes up to 57%, wee bit noisy but I don't mind since I game using headphones.

I'd advise you to first try 1100 core and 5000 memory and work from there, specially on the core, memory increase from 5000 to 5400 is with little gain tbh.

 

[joelk2]

I play BF3 with these settings and it's stable with temps reaching 51-52C max.
Fan goes up to 57%, wee bit noisy but I don't mind since I game using headphones.

I'd advise you to first try 1100 core and 5000 memory and work from there, specially on the core, memory increase from 5000 to 5400 is with little gain tbh.

This is why I'm wondering if ccc needs to be disabled or anything? It currently is running Amd overdrive and looks to be already set to 1100mhz by default. I'm wondering if using gpu tweaks or trick etc is conflicting with ccc.

The card I have is the gigabyte OC edition so looks like it comes per clocked to 1100mhz

 

[ebilcake]

Can't seem to unlock clockspeeds with Asus tweak, looking under settings and there's nothing there about extending clockspeed limit or whatever.

 

[joelk2]

it took some fiddling for me, im sure some of the small grey buttons on the bottom left of the program i needed to click before i could unlock it properly

 

[medseven]

it took some fiddling for me, im sure some of the small grey buttons on the bottom left of the program i needed to click before i could unlock it properly

This. On the main screen of GPU Tweak there is 3 small buttons to the very bottom left of it, one is to change it from standard mode to advanced mode.

You need to be in advanced mode for the 'extra' settings to appear in the settings menu!

 

[ebilcake]

This. On the main screen of GPU Tweak there is 3 small buttons to the very bottom left of it, one is to change it from standard mode to advanced mode.

You need to be in advanced mode for the 'extra' settings to appear in the settings menu!

Got it, thanks....

EDIT: 1150/5400 stable, no voltage increase, quite happy with that.

 

[Macky]

Oc'd my Sapphire 1GB 7850 to 950MHZ core and 1200MHZ mem. Temps on 7850's seem pretty insane though, idles at 22 degrees. Which is barely warmer than my room! With custom profile on fan not to go over 50% she hits about 68 degrees on furmark for a while. Anyone have any tips to OC it better. I tried the full core clock once and I seemed to have artifacting on my browser just general usage, tabs seemed to stay there after I'd closed them etc. Any idea how to volt unlock this sapphire card too?

 

[An00bis]

The GPU was not killed, but something did go wrong and now the card only works properly as the secondary card within Crossfire. For some reason there is no ouput from any of it's display ports, even though everything appears fine from BIOS and Windows. Fortunately, everything works fine within Xfire, when the display connections are hooked up to the other card.

The 1.3v ASUS bios flashed fine and was working for some time. It was when I booted up both GPU-Z and ASUS GPU Tweak, then changed some settings that the screen went blank.

I found out why your card got bricked, asus gputweak uses atiwinflash and nvflash (for nvidia) to flash your card's bios (go to gputweak's folder) when you turn on OC range enhancement (I think that's how it's called, it's the setting that removes the 1050mhz limit). This is why when you start asus gputweak and use that setting, you can start OCing past 1050mhz in amd catalyst and in other overclocking software. Too bad asus gputweak is the only OCing software that works, flashing a card's bios seems risky as hell to me and look what it did to you.

 

[Orch]

I thought my HIS 7850 Ice Q was completely voltage locked and 1050 was my limit until I stumbled on this thread, more OC fun for me tonight then! Excellent!

 

[Orch]

Can anyone tell me how to make Asus GPU Tweak boot into profile 1? At the moment everytime the system boots it goes back to default and I have to select it again. I'm sure I'm missing an option somewhere but can't find it!

Also, managed to get 1200/5600 stable, very pleased with that.

 

[krabs]

Can anyone tell me how to make Asus GPU Tweak boot into profile 1? At the moment everytime the system boots it goes back to default and I have to select it again. I'm sure I'm missing an option somewhere but can't find it!

settings > tuning > tune settings > tick the box for "keep setting on next start on close application"

 

[Daeder]

Anyone help me with my 7850. It's an Asus Direct CU II V2 7850 2gb and in GPU Tweak, the maximum voltage allowed is only 1165mv.

In Sapphire Trixx, it goes up to 1210mv but when using Trixx, I can't open any games as it just crashes. Games just won't load when using Trixx so I'm stuck with GPU Tweak.

*Edit*

Solved by using Gpu Tweak 2.0.6

 

[B@Th*nG]

i've trawled through this thread, as i bought my MSI twin frozr II OC 7850 2gb a fair while ago now, and just started playing some games which are making demands of the card. I am a bit impatient so i dropped it straight in with the high end clocks:

GPU: 1200
MEM: 1375
Volts: 1.176

This crashed pretty quickly, despite the heat being fine. So i upped the volts steadily, which consistently increased stability, until i got to 1.225 and it would be stable for about 30 minutes like this. I've now dropped the GPU to 1175 and it seems completely stable like this and so far i'm pretty happy with my lazy overclocking So now have:

GPU: 1175
MEM: 1375
Volts: 1.225

I have just a few questions:

1. Is that voltage acceptable?
2. Given that my temps never go above 70C can I push the voltage higher and achieve higher clocks?
3. If so how do I push the voltage higher? In order to unlock the voltage adjustment AT ALL I had to use Trixx, but it only goes as high as 1225
4. Do i need to run Trixx at startup to get the overclock to work at all? be nice to limit the number of programs i have running if possible, which leads me on to my next question
5. I've been using speedfan for my CPU temps to date, but it doesn't seem to offer any GPU temps, and instead of having 2 programs running is there a single program which monitors both CPU and GPU temps?

Many thanks,

B@

 

[B@Th*nG]

5. i've sorted this now, uninstalled and re-installed speedfan

/edit meh, still can't see both in the taskbar. guess i'll have to use 2 progs.

B@