Dual boot overclock quest...?

[andybenn]

I'm thinking about OC my ocuk 8800GTX's to hit this kinda spec...

core running at 626MHz
Shader Clock Speed of 1450MHz
768MB GDDR3 Memory running at 2000MHz

A good guy on here gave me a link to guru how to oc with rivatuner,

Thing i'm unsure about is I see a lot of posts where riva doesn't work well in vista 64bit is this still true ? if so what should I do? regards fan control etc?

so will I have to do 2 seperate clocks so registrys are made on each os ?

and will I be able to hit these speeds without to much hassle with temps?

hope that makes sense? thankyou

dual boot
xp 32bit
vista 64bit

Q6600 @3.0ghz (leaving it there)
4 gig OZC 1066mhz reaper
EVGA 780i board
1100 ocz psu
arctic 7 freezer pro cooler

 

[dan653]

you can get rivatuner to work with some work(using the current release candidate, see rivatuner support forums), iirc you have to boot vista x64 in test mode, which gets round the whole driver signing shennanigans; theres a guide to editing some config files on the forums to avoid having to press F8 every boot

edit:
ignore me i was getting confused with ati tray tools, rivatuners driver is now fully signed for vista x64

 

[andybenn]

thanks mate,

Now will I be able to hit those settings with out much trouble regards temps etc ?

and what are artifacts lol

 

[thegoonden]

Artifacts are little rips and tears and spots and fizzy things caused by the card being pushed too far.

You will get them on the GTX a couple of notches down from it's final fail speeds, I did anyway.
Should be OK at those clocks, as it's what my OC2 comes set at.
Don't worry about temps, the NV cores can run stupidly hot with no trouble, and their auto fan throttle is good. They also shut down some of their internals or underclock themselves if they approach thermal damage (or under-powering).
You will hit the electronic limits of the GPU and RAM long before thermal considerations are a major factor.
Some people DO however insist on treating their GPU like another CPU and freak out if it hits 70 degrees and spend fortunes on cooling. No need really.

 

[andybenn]

reading this step by step, page 3 linked below

http://www.guru3d.com/article/rivatuner-20-fan-speed--overclock-guide/3

and all was going well untill it asked me to press the add button (4th screen shot down) to set my temps for the fan profiles i had just made? there is no add button on the version of riva that I have (latest) ????

also as I have SLI & I have 2 core temps (0 core and 1 core), so I guess I would set both of them up with fan profiles, and temps correct ???

please help

 

[psychas]

i use riva tuner then i test with ati tools if i get artifacts after 10 min load u need to clock it down a bit.

 

[thegoonden]

reading this step by step, page 3 linked below

http://www.guru3d.com/article/rivatuner-20-fan-speed--overclock-guide/3

and all was going well untill it asked me to press the add button (4th screen shot down) to set my temps for the fan profiles i had just made? there is no add button on the version of riva that I have (latest) ????

also as I have SLI & I have 2 core temps (0 core and 1 core), so I guess I would set both of them up with fan profiles, and temps correct ???

please help

I would suggest that the fan profiles are over complicating matters.
In evidence I offer the fact that my OC2, and bear in mind that's a card clocked most of the way to hell, reacts like LIGHTNING to any thermal rise at all.
Eg.1:
3dMark Vantage, Feature Test 2, a very simply colour blend test. It's billions of extremely simply operations=serious heating. The fan jumps from 60 to 100% almost instantly, and remains there until the test is over. The temp rises sharply about 6 degrees, then the fan begins to push it into a plateau in the 70s, which is actually cooler than my GTS ran.

Eg.2:
That spinning shiny ball benchmark...errm Rxbt or something like that, it's linked in the useful benchmarking apps thread. With high res and high multisample values and v-sync forced off, it can really cook the GPU, FAR more than a game will. But, again, the fan kicks in quickly and the temps flatten off and stay flat in the 70's.

Of course, perhaps the OC2 has a different preset fan profile from standard GTX's, I'm afraid I've not had one to compare. Certainly the fan in this card reacts differently to that in the GTS which sort of "shadowed" temperature rises, as the temp went up a degree, so the fan upped it's speed a notch until an equilibrium was reached, usally about 85 degrees and 85% fan, the fan profile feeling no need to do anything to drop the temp back below that. I never did get either value above 85ish except by manually setting the fan to 100%.

You may wish to just do that while you're working to be on the very safe side. Then once you've got a stable clock, see if the default fan profile can handle it. If not, then you start looking into re-profiling it, or just taking the clocks back a step.

Be aware that the clocks will "snap" to the nearest valid speed based on their master clock and multipliers....someone posted the actual numbers on here recently, but for example, my "626" MHz is really 621 if I read the post right.