Overclocking 5850 Crossfire

elrasho · 7 Oct 2011 at 13:02

Been doing some searches and found this:

'What you need to do is make a profile in CCC, then you need to find the profile under users-(PCname)-Appdata-Local-ATI-ACE-Profiles

Look for this

Code:

<Feature name="CoreClockTarget_0">
<Property name="Want_0" value="17500" />
<Property name="Want_1" value="55000" />
<Property name="Want_2" value="72500" />
</Feature>
<Feature name="MemoryClockTarget_0">
<Property name="Want_0" value="30000" />
<Property name="Want_1" value="90000" />
<Property name="Want_2" value="100000" />
</Feature>

Change it to

Code:

<Feature name="CoreClockTarget_0">
<Property name="Want_0" value="17500" />
<Property name="Want_1" value="55000" />
<Property name="Want_2" value="72500" />
</Feature>
<Feature name="MemoryClockTarget_0">
<Property name="Want_0" value="100000" />
<Property name="Want_1" value="100000" />
<Property name="Want_2" value="100000" />
</Feature>

And when overclocking the mem to lets say 1125, you need to change all mem to overclock speed, 1125.

BTW

0=2d
1=3d low
2=3d

You need to start this profile upon start up, start it up twice to make sure it works because sometimes only once is not enough.'

This stopped the flickering for someone else in another forum: http://www.overclock.net/amd-ati/630908-5850-overclocking-causes-screen-flickering-4.html

Should I give it a go?

wolvers · 7 Oct 2011 at 13:36

I would have thought it better to send video and audio to the amp and then back to the display from there, that's how mine is set up. Otherwise it will see the amp as a second display and that would explain the flickering.

elrasho · 7 Oct 2011 at 13:37

wolvers said:
I would have thought it better to send video and audio to the amp and then back to the display from there, that's how mine is set up. Otherwise it will see the amp as a second display and that would explain the flickering.

Wouldn't that increase lag though? Having the av receiver in the middle? Besides my av receiver doesn't have DVI IN so I cant you it for PC. My monitor has DVI and VGA connection online, DVI for PC and VGA for xbox 360

wolvers · 7 Oct 2011 at 15:11

PC HDMI out -> amp HDMI in -> amp HDMI out -> display DVI in via adapter. Easy peasy.

Lag? No, I have a 10m HDMI cable to my display from the amp.

elrasho · 7 Oct 2011 at 15:25

wolvers said:
PC HDMI out -> amp HDMI in -> amp HDMI out -> display DVI in via adapter. Easy peasy.

Lag? No, I have a 10m HDMI cable to my display from the amp.

Thats a lot of cabling! but surely having HDMI and DVI in that 5850 cant be causing the flickering

wolvers · 7 Oct 2011 at 15:34

Erm, it's only two cables! In fact you can use the cables you have now, you just need a HDMI-DVI adapter to go in the back of the amp.

As thecremeegg said, it's common with two screens and overclocked cards.

elrasho · 7 Oct 2011 at 15:51

wolvers said:
Erm, it's only two cables! In fact you can use the cables you have now, you just need a HDMI-DVI adapter to go in the back of the amp.

As thecremeegg said, it's common with two screens and overclocked cards.

I only have one screen though: 5850 DVI >>>> Dell Monitor
HDMI >>>> AV receiver

the other 5850 is not connected to anything.

wolvers · 7 Oct 2011 at 16:18

Because there is no display attached to the AV receiver so it will appear to the GPU as a second display.

elrasho · 7 Oct 2011 at 16:24

wolvers said:
Because there is no display attached to the AV receiver so it will appear to the GPU as a second display.

Hmmm I'm gonna try overclocking with my AV Receiver switched off, that way it will only see one display.

elrasho · 1 Dec 2011 at 20:48

I was playing BF3 the other day and noticed my FPS would drop to 45fps under 'extreme action'. So having upgraded drivers to 11.11a I used AMD Overdrive Autotune to overclock. It said it would take a few minutes... in fact it took 45minutes (maybe because I have two 5850s).

Final clock speeds were 815/1100 for both cards. It actually said my second 5850 would run at 805/1130 but I lowered it to match the primary 5850. So I ran Unigine and I was amazed at the increase in score:

Before OC:

After OC:

I cant run 3DMark as its being weird and I dont have Dirt3 installed at the moment. But as you can see that's a 33% increase in performance! I never knew you could get that kind of boost with overclocking

EDIT: I don't have my AV receiver plugged into my 5850 via HDMI anymore, its using Optical from my XFI Xtreme Gamer sound card

elrasho · 1 Dec 2011 at 21:05

elrasho said:
I was playing BF3 the other day and noticed my FPS would drop to 45fps under 'extreme action'. So having upgraded drivers to 11.11a I used AMD Overdrive Autotune to overclock. It said it would take a few minutes... in fact it took 45minutes (maybe because I have two 5850s).

Final clock speeds were 815/1100 for both cards. It actually said my second 5850 would run at 805/1130 but I lowered it to match the primary 5850. So I ran Unigine and I was amazed at the increase in score:

Before OC:

After OC:

I cant run 3DMark as its being weird and I dont have Dirt3 installed at the moment. But as you can see that's a 33% increase in performance! I never knew you could get that kind of boost with overclocking

EDIT: I don't have my AV receiver plugged into my 5850 via HDMI anymore, its using Optical from my XFI Xtreme Gamer sound card

EDIT2: Just realised I had my old bechmark with CPU at stock 2.66Ghz so the jump isn't probably that big from stock clock settings to these new OC settings for my 5850s. Im gonna play some BF3 and monitor the FPS.

elrasho · 1 Dec 2011 at 21:29

Alas! I was wrong again! The overclock is actually showing a massive increase in performance. I ran Unigine again with stock 5850 speeds. The one on the left is stock 700/1000, the one on the right is 815/1100:

I'm impressed

Might not have to get a 7xxx ATI card after all

elrasho · 2 Dec 2011 at 00:47

I can play BF3 with everything on Ultra but no HBAO or deffered thingy and it runs at 80fps (max 130 minimum 70)

the game looks so much better with everything on Ultra.

d_brennen · 2 Dec 2011 at 00:58

Glad you stuck with them? Told you to ignore the VRAM hysteria

elrasho · 2 Dec 2011 at 01:00

d_brennen said:
Glad you stuck with them? Told you to ignore the VRAM hysteria

Defo mate

The 8GB of ram was the real life saver here, the stuttering stopped when I got them in. The OC I did today is the icing on the cake.

steve1873 · 2 Dec 2011 at 15:33

elrasho said:
Alas! I was wrong again! The overclock is actually showing a massive increase in performance. I ran Unigine again with stock 5850 speeds. The one on the left is stock 700/1000, the one on the right is 815/1100:

I'm impressed Might not have to get a 7xxx ATI card after all

I don't know how you are getting such high results with that overclock.

Here is my 2 5870's @ 900/ 1225 on the same settings:

What driver and CAP are you using?

elrasho · 2 Dec 2011 at 15:37

11.11a Performance driver with CAP 2. How much RAM have you got? There's 11.11b driver out too but I'm happy with my current performance.

steve1873 · 2 Dec 2011 at 16:01

I'm using 11.11 with CAP 2.

6GB RAM
i7 920 @ 4GHz
EX58-UD5

I'm just struggling to see how you have gotten an almost 30% gain taking it past 5870 xfire territory.

steve1873 · 2 Dec 2011 at 16:03

But fair play, those are impressive results. But surprising to see such a jump in performance. How is the performance jump in gaming situations?

elrasho · 2 Dec 2011 at 16:37

steve1873 said:
I'm using 11.11 with CAP 2.

6GB RAM
i7 920 @ 4GHz
EX58-UD5

I'm just struggling to see how you have gotten an almost 30% gain taking it past 5870 xfire territory.

Try what I suggested earlier, you never know it might help.

steve1873 said:
But fair play, those are impressive results. But surprising to see such a jump in performance. How is the performance jump in gaming situations?

In gaming I can play BF3 with everything on Ultra at 1080p now

FPS at steady 80 most of the time but dips to 70 when things get hectic, also maxed at 130. I switch on vsync though because I get a bit of screen tear, and by having vsync on the game animations seem a lot smoother?