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How to overclock a 7850 past 1050MHz?

Bradmax57 said:
Oh great, it doesnt look like its quiet at all under load :(

Having said that those two reviews have totally different results.....
Click to expand...

Well I ran Unigine benchmark at 30% fan, which is basically inaudible over my case fans which are quiet anyway, and got 71C maximum temps. Increasing fan to 60% which is audible, but not too bad, dropped the temps to low 50'sC. At 50% fan I can't hear the card either so I think I will probably go with something like that. This was just with a 1050Mhz overclock so can't comment what will happen when its pushed further.
 
My MSI card is in, my ASIC is now 75.5% compared to 92% of the HIS card, its at 1200mhz but needs 1240mv or so to be stable in heaven, HIS only needed 1180mv or thereabouts, but have had a little blast at 1280mhz stable too with 1.3v, bit of a pain that I have to use afterburner to set the voltage and trixx to do the clocks as afterburner and asus gpu tweak only show 1050mhz max
 
Nickjf20 said:
It's a case of if you can put the stock cooler back on the card in a way that it looks like its never been removed, they will never know. After all, the main reason they say it'll pillage your warranty is so that you'll buy a more expensive model from them with their expensive cooler fitted instead.

Obviously if the damage to the card has been caused by installation/operation of the after market cooler then you're on your own.
Click to expand...

I think this is very easy for them to control -just puta seal/tab that one needs to break to get the original cooler off...

Hmmm, dilemma...:) Weekend deal MSI 7850 (£180), refurb reference 580 (£200) or some non reference MSI/ASUS/Gigabyte 580 second hand for about £200... or save up a bit more and get a second hand 7970:)

Do I understand correctly that 7850=580 at 1200Mhz OC?
 
Bradmax57 said:
My MSI card is in, my ASIC is now 75.5% compared to 92% of the HIS card, its at 1200mhz but needs 1240mv or so to be stable in heaven, HIS only needed 1180mv or thereabouts, but have had a little blast at 1280mhz stable too with 1.3v, bit of a pain that I have to use afterburner to set the voltage and trixx to do the clocks as afterburner and asus gpu tweak only show 1050mhz max
Click to expand...
Be happy, 1280 is a good.

Trixx is the best overclocking tool for reference cards. I guess having to mix and match apps is the downside to non-ref cards.
 
And 580 can be OCed too, so with 580 being at (say) 920Mhz, it will still be what- 10% faster than 1200Mhz 7850? 20% faster?

And then of course the matter of 1200Mhz on 7850 not being a given and extra noise that it brings being possibly annoying... But 7850 has more Vram - important for games that I play... Choices, choices:)
 
Bradmax57 said:
My MSI card is in, my ASIC is now 75.5% compared to 92% of the HIS card, its at 1200mhz but needs 1240mv or so to be stable in heaven, HIS only needed 1180mv or thereabouts, but have had a little blast at 1280mhz stable too with 1.3v, bit of a pain that I have to use afterburner to set the voltage and trixx to do the clocks as afterburner and asus gpu tweak only show 1050mhz max
Click to expand...

send it back

It should be able to do 1247 at 1225, that's what I understood from the marketing jagon plastered all over the box

Triple over voltage yields 45% better overclock from standard. Since standard is 860, then 46% oc gives 1247. The highest voltage I understood from AMD was to not exceed 1225, or have I missed something?
 
BernardV said:
Hey guys, just want to know if anyone of you guys have encountered any hard-lock up grey screen's of death? Similar to this image:

http://www.hardwarecanucks.com/wp-content/uploads/ati-grey-screen-of-death.png

It is very intermittent. I re installed Catalyst 12.4 to see if it will make a difference. Will try and re produce.
Click to expand...

i've had 3 crashes now with the sapphire oc @ 1200/5800 1.18v. the first one was as you describe here, although i thought it was a voltage thing so i left 1200/5800 and bumped voltage from 1.176 to 1.18. i had two other crashes where BF3 froze and i heard a loud "BUZZZZ" from my speakers and then the computer restarted. has anyone experienced this before? is it the video card?

those are the only 3 i've had in about 2 months, but with the most recent buzz crash yesterday, and subsequently reading this thread and your post about the vram being the problem, i backed my 5800 to 5600 and am going to try this and see my results.

555BUK said:
Trixx is the best overclocking tool for reference cards. I guess having to mix and match apps is the downside to non-ref cards.
Click to expand...

i've had absolutely no problems with GPU tweak from day 1. is there something better about trixx?
 
Last edited:
Just got my VTX.

ASIC on my old MSI was 73.3%

ASIC on the new VTX is 86.3%

:D

But what a noisey cooler!

EDIT: Seems that it's noisier at idle than the TFIII, yet under load it seems quieter. That could be due to the VTX running a bit cooler at stock though.
 
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Balb0wa said:
i thought the asic thing didnt mean squat?
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It normally does, but with the varied overclocking results we have here it doesn't mean that a higher ASIC card will give a better overclock. If people are using that as a rule of thumb :p

I still think the Sapphire and HIS cards are the best out of the range.
 
Price is dead even now with 580 that costs £199 from OcUK;) I'm just afraid of hype band wagon really. No question 7850 is a tremendous OCer and was tremendous value when 580 was £250+. But that was then...
 
Borsch said:
According to this test http://www.guru3d.com/article/msi-radeon-hd-7850-power-edition-oc-review/21

7850 at 1200Mhz OC is still 10-15% slower than 580GTXs in AvP (supposedly AMD biased title as well).
Click to expand...
It swings from game to game. At 1920x1200 the 580 is slightly faster than a 7870 overall. For a 7850 to match a 7870 it needs to run at about 1075-1100MHz. To match a 580 1200MHz on the 7850 should be enough.
perfrel1920x.gif
 
Borsch said:
Price is dead even now with 580 that costs £199 from OcUK;) I'm just afraid of hype band wagon really. No question 7850 is a tremendous OCer and was tremendous value when 580 was £250+. But that was then...
Click to expand...

Why not look at the 580 overclock thread (if there is one) and compare things like overclocking ability, heaven benchmarks, fps in games, and quietness/heat produced.

For many of us....
2Gb VRAM
1 PCIE 6 Pin connector
30% overclock headroom
£180-£200 price bracket
Newer Architecture

....made the 7850 a good choice. For those who demand PhysX then the 580 at £200 is a decent buy.
 
in the US, the 580 is still well over $400 USD, with the 7850 still in the $250 USD range. the 670 is the best card for the money right now. if i were in the UK, i'd buy the 580 if it's the same price as the 7850.
 
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