Associate
- Joined
- 26 Apr 2012
- Posts
- 91
I'm using Sapphire Trixx.
-
Competitor rules
Please remember that any mention of competitors, hinting at competitors or offering to provide details of competitors will result in an account suspension. The full rules can be found under the 'Terms and Rules' link in the bottom right corner of your screen. Just don't mention competitors in any way, shape or form and you'll be OK.
How to overclock a 7850 past 1050MHz?
- Thread starter 555BUK
- Start date
I'm using Sapphire Trixx.
[timko];21800234 said:Here's my first sentence again...
Plus you've already confirmed the second part of my sentence by noting that the voltage doesn't change
The second link I gave above at Anandtech really does cover it in good depth so please have a read of it if you only have time to read one of them
thanks. i read it, but it doesn't cover at all why my voltage is running above stock speeds if nothing is changing it.
Associate
- Joined
- 26 Apr 2012
- Posts
- 91
Perhaps the voltage value was saved the the graphics card BIOS by some overclocking software you've used in the past? Just a guess.
i was using gpu tweak before this. should i have the slider on power settings away from 0% at all?
one weird thing i noticed is the fan on my GPU runs at 50% from the moment windows loads until CCC is up and running...kind of odd, but whatever i guess.
Can overclocking corrupt the card drivers? I've had a few driver errors and occasionally I get a blank screen on windows start up.
Decided to stick with overclocking on stock voltages (1.075v). Stable at 1100/5400 which seems like a really good overclock on stock voltage. Scores 1352 on Heaven and P6082 on 3d mark 11. Stock 870/4840 scores are 1108 and P5235 respectively.
Decided to stick with overclocking on stock voltages (1.075v). Stable at 1100/5400 which seems like a really good overclock on stock voltage. Scores 1352 on Heaven and P6082 on 3d mark 11. Stock 870/4840 scores are 1108 and P5235 respectively.
Lol, same type of guy as above! Ordered this morning, crossing fingers and praying to the good chip gods. First time overclocking a decent card to be honest, would I be right to summarise the 7850 as follows?
Drive sweep
12.4 driver and 12.3 CAPs
Don't install CCC
Use Asus tweak
Allow overclocking in advanced mode
Do the increment and bench dance a few times until sweet spot.
Anything I've missed? Thanks for the help!
Drive sweep
12.4 driver and 12.3 CAPs
Don't install CCC
Use Asus tweak
Allow overclocking in advanced mode
Do the increment and bench dance a few times until sweet spot.
Anything I've missed? Thanks for the help!
This is what I did:
(1) Download 12.3 CCC (full package installer), Asus GPU Tweak, Heaven 3.0 Basic (follow settings in this thread)GPU-Z (I like it, optional).
(2) Manual Uninstall of 12.2 CCC (using http://www.overclock.net/t/988215/h...l-ati-amd-software-drivers-for-graphics-cards as a guide). You can use Driver Sweeper if you like. I refuse to use it ever again as I have had issues with it causing me to revert back to an Acronis backup. That was about a year ago. Maybe it's fine now, whatever you want.
(3) Run Heaven 3.0 benchmark (using settings in this thread) to get a base starting point.
(4) Unlock Asus GPU Tweak, increase core clock in 10 Mhz increments (some people go for 20 Mhz), testing with Heaven 3.0 benchmark each time, until Heaven crashes or vpu recovery. Or, alternatively just set core clock right up to 1050 as most cards (especially Sapphire) seem to hit that fine on stock voltage. When it crashes, and it will, increase core voltage up by 10 mV (0.01 V). Then benchmark again, if it passes, up the core clock by 10 Mhz. Keep repeating until you're satisfied. Monitoring temperatures along the way.
(5) Now reset core voltage and core clock to default and repeat process for memory clock.
Or, at this point I just happened to heed the advice of other Sapphire 7850 OC users and set memory clock to 5800 with a corresponding 1.176 volts. Worked for me just fine, yet it may or may not work for you. That's when you'd have to go from scratch to find out your memory clock.
I was completely new to this as well. Bear in mind, this took me the better part of 1/2 day to be satisfied. But maybe you'll do it a lot quicker.
Note: Asus GPU Tweak seems to work fine for me and I'm comfortable using it. I just make sure I DO NOT have it open when playing Diablo 3 Beta for example, or the game hard crashes. As it stands, I have the 1200/5800/1.176 saved as a profile. If temperatures were to get obscene for whatever reason, I would simply go back to default.
I like having GPU-Z open at all times for monitoring temperatures and peak GPU usage etc. Plus I like to browse the log file after a gaming session to check out the temperature fluctuations. I won't do this all the time, but for now, just making sure I have reasonable temperatures. So far so good with Serious Sam 3 etc.
Last edited:
Associate
- Joined
- 26 Apr 2012
- Posts
- 91
I have it on +20% in Trixx.
Nah, i had the same issue with the old video card, and the crackle under load was coming from the psu...
got the video card replaced for some fan issues, new 7850 OC sapphire(had the not OC version before i swapped)
Got my new psu today(seasonic 750HT) and i hear nothing when i move the cursor.
I have a VTX arriving today, but don't plan on going mad with clocking, will be happy with 1050-1100.
The cooler is fine for that, right?
The cooler on that card will be fine even up to 1150. In games you'll probably be hitting around the low 70c with stock fan. that figure can be lowered with a custom fan profile. Anyways, at 1050 you're absolutely fine and you might not even to have to raise the v core from stock. I believe theres only been one example of a 7850 needing a voltage increase to hit 1050 an it'd seem a shame not to try and go higher considering that you "might" get a good core that goes to ludicrously high levels. The main thing is that they go high at lower voltages and the temps stay nice and low.
Really depends on the luck of the draw though.
One of my 5770's died at a LAN party this weekend 
So, I just pulled the trigger on the MSI R7850 TWIN FROZR 2GD5/OC based on this thread ^_^
I was looking for the Sapphire model (comes with the HDMI -> DVI cable I need for eyefinity), but seems no one has stock here.
So, I just pulled the trigger on the MSI R7850 TWIN FROZR 2GD5/OC based on this thread ^_^
I was looking for the Sapphire model (comes with the HDMI -> DVI cable I need for eyefinity), but seems no one has stock here.
I've seen hints in several posts that there are certain bios settings that can have an affect when OC'ing a gpu such as power saving etc. Any tips on what I should be looking out for? I don;t wanna go through all the tediousness of finding the sweet spot whilst being blithely unaware a silly bios setting is bottlenecking gpu performance.
thanks for any tips.
thanks for any tips.
Associate
- Joined
- 26 Apr 2012
- Posts
- 91
Overclocking the card will probably make it use more power than the rated TDP of the card. It has a feature where it underclocks its self when it goes over the rated TDP, so it is advisable to raise the power at which it does this.
Associate
- Joined
- 26 Apr 2012
- Posts
- 91
It's called "Board Power Limit" in Sapphire Trixx, or "Power Control Settings" in CCC.
will the underclock be noticeable in something like GPU-Z. i.e. if you have it clocked at 1200/1450, will it stutter at times of a game and drop from that clock? or is the underclock more a voltage question than anything?
how many of you have the power settings set to anything beyond 0%? anyway to find out if it is needed?