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Sapphire 5850 Toxic Overclocking

UKDTweak

UKDTweak

UKDTweak

Soldato
Joined
2 Dec 2002
Posts
6,581
Location
N.Ireland
The Idea:
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Thought I'd share my OC experience with this card since there is very little info through google, other than review sites stating What They have acheived with their review cards...

The Tools:
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I used Furmark and MSI Afterburner for testing and overclocks/monitoring temps etc...
I also have a GPU Monitor gadget on my desktop which show Load, Temp and Fan speed.

The Method:
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Firstly I ran MSI Afterburner and saved the Default Toxic clock as Profile 1.
Next I ran Furmark Stability Mode, runnning for 3-4 mins to get max temp on the card, and also noted the min, avg and max FPS plus Max temp, I ran this three times.

Once the defaults were logged, I then set Profile 2 to 800 on the core and set the fan to 55% (just noticable over my case fans). From there I increased the core by 5mhz and ran Furmark stability each time until I reached 825 with no artifacts or lockups etc..
I then set about increasing the mem clocks in 5mhz increments, running Furmark Stability test and Benchmark test each time to note if there were improvements or not.

I wont bore you with All these results from above, as I have a few now :)
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Furmark Settings:
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With each profile now set in MSI Afterburner, I used Furmark Benchmark Mode, set to run 3000 frames @1440/900 windowed mode.

CCC Settings:
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Vysnc is Off by Default and 4x AA enabled and 8x AF in CCC. I ran the test 3 times for each profile loaded in MSI Afterburner.

The Results: Lowest recorded out of three runs each.
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Defaults Clocks: Also saved as profile 1 on MSI Afterburner.
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Core: 765
Mem: 1125
Fan: Auto

Min: 109
Avg: 135
Max: 173

Max temp with fan running on Auto = 70
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Overclocked Settings: Saved as Profile 2 on MSI Afterburner.
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Core: 825
Mem: 1150
Fan: 55%

Min: 125
Avg: 151
Max: 207

Max temp with fan running on 55% = 74, I was Not happy with this temp, so altered the profile to run at 60% while Furmark was still running, temps dropped to 66 :)
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I don't know how much further this card may go, being the Toxic, I cannot alter the voltage, and to be honest, I'm happy to leave it were it is, as its already running plenty fast for the games I play ;)

EDIT: Please see post #8 for update... now running at 850/1200, fan @60.
 
Last edited:
To be honest, I bought the Toxic for two reasons, it was in stock at a local shop and I was not planning to overclock it at all...

I never bought it with the intention of overclocking, and thought a factory overclock would suit me fine, however, being a OC'er, I eventually gave in to the temptation, hence the OP ;)

It may not clock as fast as your ref model, but it runs cooler and quieter by all accounts, so adding it all up, paying £40 extra was not so bad. You presumably bought yours on release, hence the Much lower cost...
 
The temp with the fan running at 60, while playing BFBC2 at max settings has yet to get over 47, and its bearly noticable over my case fans :)

You can't alter the voltage as the board is not reference and so does not have the same power chips....

As I already said though... I did not buy the card to OC it, it performs plenty well enough at stock settings, I just thought i'd see were I Could get it and post so other with the same card would have a ref to go by, and as stated in my first post... I have yet to bother trying higher clocks, so no idea how much farther it May go :)
 
Been doing so more testing... only with Furmark, and Heaven, furmark seams to be good at overheating the GPU so is good for stability..

Now running 3D profile at 850/1200 :)

My desktop monitors and MSI settings...


Heaven Results...

http://img175.imageshack.us/i/heavenf.jpg/
heaven21.jpg

Temp in Furmark got to 65, Heaven never got past 48 !
Now to try some games :)
 
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Quick update,

Decided to try getting a little higher OC, was able to bench Furmark @ 900/1250, scoring 5XXX, but games would crash the ATI drivers within a minute of loading :(

Games would also crash with core @880, but run fine at 870/1230...
Have run 3D Vantage @ 870/1230, but decided to settle for 865/1225, thats 100mhz above Stock Toxic speeds on both core and memory... :)

Spec and benchmark Screenies linked in my sig :)
 
The 5850 running at same clocks as a 5870, will be within 5-10% performance wise, so yes, the 5850 is better Bang for Buck!
However, as with all things OC related, you cant guarantee how far your selected card will OC.
 
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