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Your Radeon 7850 overclocking results? - Page 35

post #341 of 501
Is there any way to tell whether or not a GPU is voltage locked without actually touching them? Just curious.
post #342 of 501
Like physically looking at it, or software?

Physically looking at it.... IDK.

Software, I would use Asus GPU Tweak (my personal opinion) and see how high you can ramp the voltage up.
post #343 of 501
*ka24e* How could you reach a stable 1325MHz GPU clock? Your i5-3570K @ 4,8GHz looks pretty cool too, what settings do you use?

I have an MSI 7850 2GD5/OC (1225MHz/1450MHz) and an i5-3570K (4,3GHz)
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post #344 of 501
Quote:
Originally Posted by *ka24e* View Post

Like physically looking at it, or software?

Physically looking at it.... IDK.

Software, I would use Asus GPU Tweak (my personal opinion) and see how high you can ramp the voltage up.

Software wise and I meant without actually increasing voltages.
post #345 of 501
Quote:
Originally Posted by Gamer4eveR View Post

*ka24e* How could you reach a stable 1325MHz GPU clock? Your i5-3570K @ 4,8GHz looks pretty cool too, what settings do you use?

I have an MSI 7850 2GD5/OC (1225MHz/1450MHz) and an i5-3570K (4,3GHz)

Just lucky and I have a lot of fans, lol. I'll try to explain my setup as simply as I can, but it's kinda complicated.

Basically the mobo is laying flat on a makeshift test bench (open air of course), so the GPU is standing vertical. The GPU die itself is cooled with a Corsair H70 with x2 100mm fans in push pull.

- There are x2 100mm fans blowing down on the card (fans sitting horizontal across top of GPU pointing down) cooling the front and back of the card.

- On the VRM side, I have a 90mm fan blowing at the VRM plate. On the oposite side of the card (where the PCI-E power plug is) I have another 90mm fan blowing to cool the MemV regulators as well as the sink-ed RAM chips on all 8 modules.

- The card has also been flashed with the Asus BIOS, which I posted info on early in this thread.

There is still more left in the 7850, but the VRM's get really toasty at full load. A full cover water-block and I could hit 1350 or if I'm really lucky 1400Mhz! tongue.gif

The CPU is being cooled by a lapped and modded H60 (see description in sig rig), along with a lapped CPU IHS (top and bottom) and I'm using Coolabratory Liquid Ultra on the die and IHS.

I'd have to go into the BIOS to get exact settings but I'll try to list them off the top of my head:

- Internal PLL overvoltage = Disabled
- LLC = Ultra
- VRM Frequency = 500Mhz
- Turbo Ratio NOT per core = 48
- Offset + @ 0.175v
- VCCIO Voltage = 1.125v
- VCCSA Voltage = 0.925v
- CPU PLL Voltage = 1.5v
- Additional turbo voltage = 0.200v
- Primary power plane = Highest it will go
- CPU Current Capability = 140%
- Phase control = Extreme
- Duty Control = Extreme

- Ram currently running @ stock = 11-11-11-28-1T 1.5v

- Voltage reported with AIDA 64, CPU-Z and every other software program = 1.52-1.54v load.
- Voltage measured with a multi-meter at full load using Intel Burn Test = 1.72-1.744v

- Temps running Prime 95 never break 90C
- Temps running IBT get into the 100-105C mark (Gflops do not take a hit tho.... so I'm not sure if its actually hitting 105C or not, because it doesn't throttle).
- Temps gaming = < 70C. I've never seen any game push temps past 70C.






Quote:
Originally Posted by Baghi View Post

Quote:
Originally Posted by *ka24e* View Post

Like physically looking at it, or software?

Physically looking at it.... IDK.

Software, I would use Asus GPU Tweak (my personal opinion) and see how high you can ramp the voltage up.

Software wise and I meant without actually increasing voltages.

Just move the slider all the way up, but don't click apply or save. As long as you don't click apply the voltage won't actually take affect.
Edited by *ka24e* - 5/26/13 at 3:45am
post #346 of 501
And what will happen if card has locked voltage? It won't even let me slide the slider at all or something? Also, what are the stock voltage? Does each card has different stock voltages or it's fixed for all?

Thanks.
post #347 of 501
If you cant move the slider at all, I would try to extend the overclock range (Asus GPU Tweak) and see if that works. If its still grey'd out, your probably out of luck. The only option from there would be to try a different program or flash the BIOS.

Or you can sell me your 7850 cheap and I can attempt to BIOS flash and run a pair of 7850's in crossfire tongue.gif
post #348 of 501
lol I was just asking for the heck of curiosity. Thanks for all the information. tongue.gif It means unlike Keplers there are ways to unlock voltages on these GCN cards?
post #349 of 501
I just got a xfx 7850 and put an arctic accelero mono plus cooler on it and used Trixx for my overclock.... my VDDC is 1160 CORE is 1200mhz and MEM is 1350mhz.....
Here is the link...how am I doing so far??....Oh yes my ASIC is 77.4%....
http://www.techpowerup.com/gpuz/2sen3/
    
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post #350 of 501
Not bad at all. A 1200 core clock really makes the 7850's move. If your temps are good, keep going. thumb.gif
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