How to overclock a 7850 past 1050MHz?

[wazza300]

Hi Guys,

Think I've got a bit of a donkey for overclocking as can only get 1040 at stock volts!
1050 @ 1.14V but at 1.2V I can only get to 1080
Max temps of about 60c

I upped the power offset to 20%, ran driver sweep before installing the latest drivers (12.8) along with CAP1.3 and haven't installed CCC or Afterburner.

I keep getting d3d11appwindow swap_window() device removed if I push it over the above settings in GPU Tweak along with Heaven freezing or black screens.

Is there anything else I can do or just accept that's the way it is sometimes?!

Any suggestions gratefully received....

EDIT - I've left the memory at stock if that makes any difference. ASIC 76.8

try voltage at 1.172v and core at 1.172mhz and memory at 5500mhz (using asus gpu tweak)

 

[clummzie]

try voltage at 1.172v and core at 1.172mhz and memory at 5500mhz (using asus gpu tweak)

Heaven crashed as soon as I hit 'run'.
1080MHz was the highest clock I got at 1.2V so 1172 was probably pushing it - have I understood you right?

I'm not sure that 1050 is stable after all as last night I had Sleeping Dogs on pause and came back to my PC with the fan going mental and a white screen with DVI in the right hand corner!!

I'm going to stress it at stock values today as I'm not that convinced the card is any good.

 

[Surveyor]

Heaven crashed as soon as I hit 'run'.
1080MHz was the highest clock I got at 1.2V so 1172 was probably pushing it - have I understood you right?

I'm not sure that 1050 is stable after all as last night I had Sleeping Dogs on pause and came back to my PC with the fan going mental and a white screen with DVI in the right hand corner!!

I'm going to stress it at stock values today as I'm not that convinced the card is any good.

If you're overclocking the VRAM then don't.

Leave the VRAM until you've found out how far you can overclock the core.

 

[krabs]

try voltage at 1.172v and core at 1.172mhz and memory at 5500mhz (using asus gpu tweak)

Tried that, instant black screen when heaven3.0 finish loading


Powercolor 7850 2gb normal not the PCS+
75.9% asic
1170core 1225mv(max) 5800memory benchable in heaven3.0 and 3dmark11
1140core 1225mv(max) 5500memory stable in crysis2 and battlefield 3

 

[555BUK]

isn't 1.2v like, dangerous for 24/7? or 1.2v is not equal in terms of damaging power for every 7850 gpu, so that means 1.038v like mine and cards like yours get damaged the same by electromigration at 1.2v? Maybe you can rma the card and get another, 1.2v seems way too high for me, but maybe first try to overclock, maybe youll get lucky and youll see that 1200mhz is possible on your card at those volts.

1.2v is completely safe. Most 7870's default voltages are set to 1.218v, and a 7850 is just a 7870 with some of the sahders disabled. 7850's will be completely safe at 1.225v so long as temps stay below 85deg.

 

[at3k-]

Ok so i was a bit disapointed in my stock voltage being 1.2mv and asic 70%. Now whats wierd is my card seemed more unstable on stock clocks running the heaven benchmark. Had a couple of ctd's the other day and driver crashes, same story when upping the clock to 1000mhz.

Anyway its a bit early to jump for joy yet but ive just done a hand full of heaven runs first at 1100/5800 then 1100/5700 (turned memory down as i was gettin a tiny bit of artifacting) with absolutely no hiccups at all, temps max at 66c. So ive just banged it up to 1150/5700 and still faultless, very suprised to say the least. only had 30mins in bf3 and everything seems fine but need a few days to be sure its stable.

Heaven Benchmark v3.0 Basic
FPS:
56.8
Scores:
1432
Min FPS:
30.1
Max FPS:
118.3
Hardware
Binary:
Windows 32bit Visual C++ 1600 Release Mar 7 2012
Operating system:
Windows 7 (build 7601, Service Pack 1) 64bit
CPU model:
Intel(R) Core(TM) i5-2500K CPU @ 3.30GHz
CPU flags:
3292MHz MMX SSE SSE2 SSE3 SSSE3 SSE41 SSE42 HTT
GPU model:
AMD Radeon HD 7800 Series 8.981.2.0 2048Mb
Settings
Render:
direct3d11
Mode:
1920x1080 4xAA fullscreen
Shaders:
high
Textures:
high
Filter:
trilinear
Anisotropy:
4x
Occlusion:
enabled
Refraction:
enabled
Volumetric:
enabled
Tessellation:
normal

 

[liamcrane]

anyone know how to view VRM temps? they dont appear to be showing in GPU-Z for me?

 

[555BUK]

anyone know how to view VRM temps? they dont appear to be showing in GPU-Z for me?

Some card have custom vrm's and power management that either does not output temperatures, or cannot yet be read by GPU-Z. Just ensure that you have the latest version installed.

 

[liamcrane]

ok mate cheers for that, i have the MSI 7850 and i must admit i dont think i have ever seen the VRM temps via GPU-Z so i guess your right with regards to some custom cards to showing the temp output. I remember seeing it on my old 5850 which was a reference design card

Thanks for the info matey

 

[Davefran]

How are you getting past the 1050 ccc limit ?

 

[An00bis]

1.2v is completely safe. Most 7870's default voltages are set to 1.218v, and a 7850 is just a 7870 with some of the sahders disabled. 7850's will be completely safe at 1.225v so long as temps stay below 85deg.

Yeah I thought the same but I really have 1.038v I haven't seen a lower stock voltage for 7850 or 7870 on the internet... you seriously don't think that it would damage some other components on the gpu's pcb not just the gpu itself that could probably handle it well? at least for like 1-2 years or more, that would be enough for the next upgrade.

I'm talking about the vrms, the memory chips and the other components on the card.

 

[555BUK]

Yeah I thought the same but I really have 1.038v I haven't seen a lower stock voltage for 7850 or 7870 on the internet... you seriously don't think that it would damage some other components on the gpu's pcb not just the gpu itself that could probably handle it well? at least for like 1-2 years or more, that would be enough for the next upgrade.

I'm talking about the vrms, the memory chips and the other components on the card.

Some 7850's run stock volts of 1.218v. I am sure that 1.225v will be completely safe, and I personally have no reservations runnng 1.3v so long as temps stay below 80deg.

 

[will1b]

I've just received a few driver crashes, even on stock settings (Just to make sure from my normal minuscule 40MHz overclock). So, I pose the question - which version of the Catalyst drivers should be run to get the best overclock? At the moment I'm stuck at Catalyst 12.3 (Display 8.961.0.0)because I know they're relatively stable.

 

[CyberCrow]

Have you disabled ULPS?

If you haven't install Sapphire Trixx an disable it, then update your driver to 12.8.

Don't bother 12.9 beta unless your x-fire.

In Trixx give your board power an extra 15-20% with the slider.

 

[will1b]

ULPS is disabled using TriXX (It always has been) and Board Power Li(mit) is right up to 20(Also as it always has been). I'll update the drivers now.

 

[RooBoonix]

Does overclocking a graphics card void it's warranty?

I have a Gigabyte 7850 coming in the post, already OC'd to 975mhz. But if I can squeeze more out of it, without voiding the warranty, then it's kind of a crime not to!!


Cam.

 

[at3k-]

Brilliant after disabling ulps and bumping up the power limit to 15% i have gained just over half a framerate in heaven. from 55.5 average to 56.2.
this is with 1125/5800, on a card with 70%ASIC n all.

 

[555BUK]

Does overclocking a graphics card void it's warranty?

I have a Gigabyte 7850 coming in the post, already OC'd to 975mhz. But if I can squeeze more out of it, without voiding the warranty, then it's kind of a crime not to!!


Cam.

Technically yes (if you go above Catalyst Control Panel limits), but there is no way any manufacturer can prove a card has been overclocked.

 

[An00bis]

Brilliant after disabling ulps and bumping up the power limit to 15% i have gained just over half a framerate in heaven. from 55.5 average to 56.2.
this is with 1125/5800, on a card with 70%ASIC n all.

put the power limit at 20% and 0.5fps sounds weird to me but (I'm not an expert just a guess) that program has a lot of tesselation i think the main thing it tests is tesselation and i think the cut part of the gpu chip in 7850 makes a big difference in this program, same thing for software like luxmark and stuff, noticeable difference between 7850 or 7870 for example i think the clock doesn't change the score that much in those programs. I have this assumption because in games an OC from stock 900 to... 1200 or something makes a pretty large difference, like 10-20% or more in some games, I never experiences increases of only 0.5fps.

 

[LtMatt]

If you're going to overclock, regardless of the amount you intend to overclock just stick the power to +20%. Think of it as fire and forget.