HD 7850 Overclocking question.

[D'Raizerio]

Hey guys! Was wondering if I could ask you peeps if this overclock is actually worth the additional Voltage increase.

So, a few days ago, I wanted to see just what my Gigabyte Radeon HD 7850 2GB could do. I've searched up results on the 7850 overclocking and it seemed like people had all sorts of results, from getting a very mild overclock(950mhz) to full on beast mode overclocks (1300mhz+). Deciding I am still up for it, I downloaded afterburner, unlocked the voltage, core and memory sliders after a reboot. 

The results are following

The first overclock that I deemed worth from the original 975/1200 at 1.139mV factory OC was 1075/1230 1.180mV which I thought was a decent boost in of a 100mhz on core. Everything was stable after a few runs of Heaven, Valley and 3D mark 11 in succession. Then, I decided to see if I can push for that 1100mhz mark and while I was successful at around 1.208-1.212 more or less, I felt like the voltage increase was way too much for the 25 extra mhz.


So there's my first question, is it worth to bump up to that voltage to break the 1100 mhz barrier, or should I leave it where it is? (ASIC Quality is 78.5%)

After that was done, I went on to see what sort of a performance gain I got out of my decent overclock.

My 1075/1230 in 3DMark 11 scored 7358 on performance settings, well above a GTX 580 who was around 6600-6800 from the charts I've seen.

Since I was satisfied with the core overclock, I went on the memory. From there, I went from the 1230 to 1450 which was where the original barrier was and didn't really want to push it any further while still getting 101 points more in 3D mark out of it, totaling it at around 7459

So, I was finally at 1075/1450 on 1.180mV, everything looking as stable as it could. The temperature did get up to the 72-73 range, but leaving the card to do the temperature management managed to keep it under 70 most of the time. (I could easily slide the slider up to 60% and keep it fairly cool at the expense of noise since it is a Windforce card)

To add to that, I decided to throw in a custom 30-sec benchmark in Crysis 3 between 975/1200 and 1075/1450 (I can't underclock the card to reference 7850 as the card defaults to 975 every time I try.)
The resolution I am running at is 1440x900 with all of the details set to High, Textures on Very High, No v-sync, x16 Anisotropic filtering and FXAA (Solar Flare is on too, or whatever is that last option in the advanced menu called.)


No OC:
Max: 87
Min: 34
Average: 58 

With OC
Max: 96
Min: 40
Average: 66



So my question is, is this overclock and the performance it gives worth the extra bump in voltage and power limit?

(The Max Temperature in the picture was because of Kombustor. The card never got that toasty while gaming.)

[Mush Brain]

Hey guys! Was wondering if I could ask you peeps if this overclock is actually worth the additional Voltage increase.

So, a few days ago, I wanted to see just what my Gigabyte Radeon HD 7850 2GB could do. I've searched up results on the 7850 overclocking and it seemed like people had all sorts of results, from getting a very mild overclock(950mhz) to full on beast mode overclocks (1300mhz+). Deciding I am still up for it, I downloaded afterburner, unlocked the voltage, core and memory sliders after a reboot.

The results are following

The first overclock that I deemed worth from the original 975/1200 at 1.139mV factory OC was 1075/1230 1.179mV which I thought was a decent boost in of a 100mhz on core. Everything was stable after a few runs of Heaven, Valley and 3D mark 11 in succession. Then, I decided to see if I can push for that 1100mhz mark and while I was successful at around 1.208-1.212 more or less, I felt like the voltage increase was way too much for the 25 extra mhz.

So there's my first question, is it worth to bump up to that voltage to break the 1100 mhz barrier, or should I leave it where it is? (ASIC Quality is 78.5%)

After that was done, I went on to see what sort of a performance gain I got out of my decent overclock.

My 1075/1230 in 3DMark 11 scored 7358 on performance settings, well above a GTX 580 who was around 6600-6800 from the charts I've seen.

Since I was satisfied with the core overclock, I went on the memory. From there, I went from the 1230 to 1450 which was where the original barrier was and didn't really want to push it any further while still getting 101 points more in 3D mark out of it, totaling it at around 7459

So, I was finally at 1075/1450 on 1.179mV, everything looking as stable as it could. The temperature did get up to the 72-73 range, but leaving the card to do the temperature management managed to keep it under 70 most of the time. (I could easily slide the slider up to 60% and keep it fairly cool at the expense of noise since it is a Windforce card)

To add to that, I decided to throw in a custom 30-sec benchmark in Crysis 3 between 975/1200 and 1075/1450 (I can't underclock the card to reference 7850 as the card defaults to 975 every time I try.)

The resolution I am running at is 1440x900 with all of the details set to High, Textures on Very High, No v-sync, x16 Anisotropic filtering and FXAA (Solar Flare is on too, or whatever is that last option in the advanced menu called.)

No OC:

Max: 87

Min: 34

Average: 58

With OC

Max: 96

Min: 40

Average: 66

Capture.PNG

So my question is, is this overclock and the performance it gives worth the extra bump in voltage and power limit?

(The Max Temperature in the picture was because of Kombustor. The card never got that toasty while gaming.)

I would max the voltage and attempt for highest clocks.

My 7770 comes stock at 1.2v, and does 1250mhz lol.

[xAcid9]

What is the default voltage?

[D'Raizerio]

What is the default voltage?

As I said, it was 1.139mV. ^^

[D'Raizerio]

Going to bump this since I'm still sort of in the need of help. :v