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New HIS 7950 IceQ Boost Clock 3GB - overclocking it

gupott

gupott

gupott

Associate
Joined
26 May 2008
Posts
247
Hi there,

I just took delivery of my new 7950 'boost' edition card. It seems to be running at 925 Core Clock as standard and 1250 memory clock. The card is running in a I5-3570 pc clocked at 4.5 ghz

Anyway, running 3Dmark11 at 925/1250 I get a score of 8058, I can bump this a bit if I increase the core to 1150, I then get a score of 8465. However if i touch the memory at all the 3dmark11 score drops to the 6000's.

How do I increase the memory clock without reducing the performance?

What type of speeds/scores should I be getting?

Even without o/c farcry3 has been running very smoothly with it maxed out at 1900x1200 (my single monitor resolution). So its not urgent to o/c now, but I would like to make the most of the card.

Thanks guys.
 
As rolypolyman stated above there really is very little to be gained even in benchmark scores so in game I really don't think u would notice any difference at all if my memory serves me correct the difference between 1450 to 1580 on my card was about 20 points in heaven 4 with the forum settings so in game I doubt u will see anything I would concentrate on ocing the core like a beast! Lol

The bandwidth for the memory is plenty even when the core is oc'd it seems
 
rosscouk said:
Anyway, running 3Dmark11 at 925/1250 I get a score of 8058, I can bump this a bit if I increase the core to 1150, I then get a score of 8465. However if i touch the memory at all the 3dmark11 score drops to the 6000's.

How do I increase the memory clock without reducing the performance?
Click to expand...

Memory correction kicking in, you need to apply a little voltage to the vram to get it stable and keep your scores in line, but don't go crazy on the voltage as vram is usually the first to go pop on a gpu.

Use AB or His iTool for vram voltage adjustment.

As above the core mainly gets the performance.
 
Thanks for the replies, that being the case with the memory I am probably not going to mess around with it now, doesn't really seem worth it for small gains.

How far will the core go, in peoples opinions? I was just upping it using afterburner by 50mhz chunks and then testing with 3dmark 11.
 
^this^
Most people see atleast 1000 on the core but I should imagine in that voltage u should see 1100-1150

It's a silicone lottery.

On my 7950 I see 1150 @1.225 1250/1580 @1.28
 
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If i'm not wrong the His 7950 IceQ uses Elpida memories and this memories are not that good to overclock.

you are getting lower score, because your memories are getting errors, but they have error check so to fix the errors you lose performance.
 
Thought I'd chime in - I had a similar issue when I first started over-clocking my 7950 - beyond a certain point my scores were actually less while over clocked than not - the issue was that the card effectively throttled itself back because it needed more power - where your are overclocking in you should see a slider for power control - bump it up to the full +20 and re-run the benchs - youll see a difference :) - the O.C I have in my sig was achieved without having to mess with the voltage - just upping that power slider - good luck :)
 
I just had another go after the comments here, particularly from Doco. Using Afterburner I pushed the powerlimiter to +20 (what does this actually do?), then I adjusted the core to 1175 (I built up to this) and the memory to 1350. Again, using 3dmark11 I am now getting scores in the region of 9220's, which is a decent jump. I was watching the temps on the card and leaving the fan on auto saw temps in the mid 60's. So I adjusted it to stay at 50% all the time, only a bit louder and much better cooling.

So after all that I think I may adjust down a little, perhaps to around 1150/1350. Should I adjust back the power limiter until I get lower scores again and can then move up a bit. Or will the +20 not effect anything?
 
Nothing to add, I'm in the same boat about to oc my HIS 7950, but mine being the reference card. This thread meens I don't need to start a seperate thread. How did you get on with the built in boost iTurbo , I pressed it just to try I went from 800 to 808 and from 1250 to 1262, pretty much pointless.
 
the +20 slider just allows the card to pull a little more power when needed its harmless so i personally would leave it at 20.

glad u got your oc sorted.
 
paulstung said:
Nothing to add, I'm in the same boat about to oc my HIS 7950, but mine being the reference card. This thread meens I don't need to start a seperate thread. How did you get on with the built in boost iTurbo , I pressed it just to try I went from 800 to 808 and from 1250 to 1262, pretty much pointless.
Click to expand...

wow i didnt mean to laugh but that increase did make me laugh 08 increase lol:D:p
 
I no mate, I had to press it a few times just be sure, I wasn't seeing things. The thing is though, that is a big selling point for the HIS cards, the i (un) turbo, function.
 
If you hit the advanced tab in iturbo you get features similar to afterburner, so its up to you which you use as for doing what I have done you could you use either.

Let us know how you get on paulstung, interesting to compare the two. I haven't had any issues yet, I might push harder and see how far I can take it at some point.
 
as chris-82 said - the slider just allows the card access to a little extra power if required, no harm can come from it, glad you got it sorted anyways - as stated I had the same problem when first oc my own card :)
 
chris-82 said:
^this^
Most people see atleast 1000 on the core but I should imagine in that voltage u should see 1100-1150

It's a silicone lottery.

On my 7950 I see 1150 @1.225 1250/1580 @1.28
Click to expand...

Does that not get roasty toasty at 1.28V? I get temps of up to 78C at 1150/1450 @ 1.19V!
 
Got my HIS 7950 at the weekend so will be trying this tonight. From what I can see above its ok to move the silder to 20% then have a play with the core and the memory?
 
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