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Replacing TIM on Sapphire HD 5770 and OC

post #1 of 24
Thread Starter 
Hey OCN

I have my two Sapphire HD5770 1GB in Crossfire as shown in my sig rig.
They have served me very well for allmost a year, and I have no intention of replacing them - they suits my needs.

But here is the thing, Ive considered OCing them - because we do like to OC, even if the PC is running fine, right? .. And I've been watching my temps for a while, and the top one is significant higher temperature, then the lower one.

Of course there is a explanation to it - it gets all the heat from the lower one, and its also sqeezed in between my CPU cooler

So here is my questions:

1: Is there anything to worry about while OCing the HD5770 in CF? Or should I stay below som certain clock?
2: Is it worth to replace the TIM? I have some MX2 laying around
3: Is the stock Sapphire cooler good enough while OCing the GFX?
4: What Software should I use? CCC or MSI Afterburner?
5: If I use the CCC, I have to "unlock" the OC ability, would I be able to RMA the card anyway? If anything goes wrong.

Sorry for my kindda noobish questions, but I'm not that familiar with OCing GFX's, espeicalle not multi GFX's
Edited by FreakaZoidDK - 5/27/11 at 1:01pm
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post #2 of 24
I'd just leave the stock TIM on them honestly.

Those cards can OC like a beast just the way they are, so unless you are going to put water blocks on them, I wouldn't bother. Use Afterburner with Unofficial OC enabled.

Just make sure they can breath.
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post #3 of 24
Thread Starter 
Quote:
Originally Posted by gsa700 View Post
I'd just leave the stock TIM on them honestly.

Those cards can OC like a beast just the way they are, so unless you are going to put water blocks on them, I wouldn't bother. Use Afterburner with Unofficial OC enabled.

Just make sure they can breath.
All right - I have a decent airflow in my case, so it shouldt be a problem. Do you have any idea for some speeds I should be able to reach "safe"?
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post #4 of 24
If you have the TIM on hand i would say go ahead and do it, but i would not go out and spend $10 just for the GPUs. I got an after-market cooler on my XFX card with Arctic Silver 5 on it. Im not sure what the difference it made is, but many people say its good.

If you are using Afterburner 2.0 or newer, there is a line that needs to be added in the afterburner.cfg file. At the bottom there is a line that says:

[ATIADLHAL]
UnofficialOverclockingEULA= (blank)

Change to:
[ATIADLHAL]
UnofficialOverclockingEULA= I confirm that I am aware of unofficial overclocking limitations and fully understand that MSI will not provide me any support on it

Doing this allowed me to pass the factory limits for Core, Memory and Voltage on my xfx HD5770 and Sapphire HD5770
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post #5 of 24
Thread Starter 
Quote:
Originally Posted by CHez View Post
If you have the TIM on hand i would say go ahead and do it, but i would not go out and spend $10 just for the GPUs. I got an after-market cooler on my XFX card with Arctic Silver 5 on it. Im not sure what the difference it made is, but many people say its good.

If you are using Afterburner 2.0 or newer, there is a line that needs to be added in the afterburner.cfg file. At the bottom there is a line that says:

[ATIADLHAL]
UnofficialOverclockingEULA= (blank)

Change to:
[ATIADLHAL]
UnofficialOverclockingEULA= I confirm that I am aware of unofficial overclocking limitations and fully understand that MSI will not provide me any support on it

Doing this allowed me to pass the factory limits for Core, Memory and Voltage on my xfx HD5770 and Sapphire HD5770
All right - I got the TIM on hand .. So not something I have to buy specially for this project .. I have plenty on hand.

Okay .. What settings are you running your HD5770's at? .. Just so I have an idea?
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post #6 of 24
I have been able to run stable at 930Core and 1325Memory at stock voltage in everything from OCCT to Furmark to Folding@Home. Ive pushed a few times to 970Core 1375Mem at 1.25v but start to get errors in Folding@Home.

My Scythe Setsugen 2 is on the Primary Card which never gets over 65C even OC'd
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post #7 of 24
Thread Starter 
Quote:
Originally Posted by CHez View Post
I have been able to run stable at 930Core and 1325Memory at stock voltage in everything from OCCT to Furmark to Folding@Home. Ive pushed a few times to 970Core 1375Mem at 1.25v but start to get errors in Folding@Home.

My Scythe Setsugen 2 is on the Primary Card which never gets over 65C even OC'd
allright - seems like a fair overclock none the less .. What voltage do you have at 930core / 1325 memory? ..

I might not be able to reach the same as you because my primary card reaches 60-62c on full load with stock cooler .. but its still ok
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post #8 of 24
930/1325 @ 1.125v stock voltage

Im Folding@Home right now at Stock 850/1200 Clocks at 50C on main card and 59C on secondary card
Edited by CHez - 5/27/11 at 11:54am
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post #9 of 24
Thread Starter 
Quote:
Originally Posted by CHez View Post
930/1325 @ 1.125v stock voltage
Great .. your aftermarket cooler - dos it stay within 1 slot? .. So the whole card still is only 2 slots? .. Seems like its worth to invest ..
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post #10 of 24
Yes it does! but the heat pipes block one of the crossfire tabs. My XFX card only has one Tab so i have to keep it on the bottom slot so its not being blocked.

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