Overclock Performance Thread - (Vista Only ATM)

I've been doing some overclocking in Vista and have been using the Doom 3 timedemo as a benchmark. Here's a few numbers for you all:

Doom 3 Timedemo /w usecache
1440 x 900
High Quality
No AA/8x AF

(nVidia 8600m GT)

(Core Clock/Memory Clock)
475/400 (stock): 58.7
500/400: 59.6
525/400: 60.5
550/400: 61.5
575/400: 62.4
600/400: 63.4
(Core clock not maxed, I just felt like stopping there.)

475/428: 60.2
475/451: 62.3
475/474: 63.8
475/497: 65.5
475/520: 66.9
(Memory clock maximum reached, I believe. Not going further.)

Combined:
600/520: 75.2

Not a bad increase, and completely stable. Note that if this was performed in Windows XP, I have full confidence that the final score would've been in the 80s as at stock, the benchmark result was ~64fps compared to 58.7 in Vista.

 

Good stuff, thanks for trying it out and posting the results. Did you happen to monitor the temperatures? How long were the demos run? Any tearing or artifacts?

 

The temperatures actually didn't get that hot, only around 65C. No artifacts (unless I went over ~530 on the memory). I tested stability with rthdribl, a very stressing HDR program.

Tearing isn't a result of instability.

 

What GPU man

 

nVidia 8600m GT.

 

is it stable at those speeds

my bad i didnt read u said that at the bottom lol

Yea like dc74 said ....temps

 

10 characters

 

have you used 600/520 for an extended period of time, like 2hours + of constant gameplay?

 

Since you've tested these to be stable, would it be safe to immediately bring up the speeds on a fresh card right up to around 600/500? Or should one still use small increments?

 

No, but I have rthdribl running in the foreground as we chat, and it's still going strong.

No. No card is the same. You should use incremental increases until you find your stable settings.

 

Here are my 3dmark06 scores stock and overclocked.

I use Atitool's artifact scanner to get the best overclock which is very stable.

Note that the temps difference between oc and stock is a measly 2degrees, goes to show that Dell has superb cooling on their new inspirons.

 

What about drivers on laptopvideo2go they were sayin u need specific drivers.. is there anything specific u used or stock vista. and what program did you use. Im sorry i sound like a noob but im new to OCing. I just been usin Ntune on my home pc

 

ChaosDimension
hey i see that lil WOW icon on ur quick launch bar. What kind of frame rates do u get in shat and SW and less populated places like Tram. Stock and OCed this is my main reason for buying this card so that info is realy important to me.. i would really appreciate it

 

What software did you use to overclock it? Would you mind writing a newbie's guide?

 

I used the 158 drivers that which allows me to overclock.

My framerates in wow at 1680x1050
everything maxed cept 1x multisampling(FSAA)is about

25+ in Shattrath
50+ everywhere else

with 8x AA I get around 10-15 in Shattrath
And around 25-35 everywhere else.

So basically if you don't mind playing with AA(which won't make a big difference since the reso is so high) then yeah, you can max everything out no problems and get very decent framerates in shat and almost a constant 45+ everywhere else. This on stock btw, with OC'ed its even better.

Edit: The overclocking tool to get the clocks to stay is Ntune, because atitool reverts back somehow. I just use atitool because the data is laid out very well and the artifact scanning is top notch. If you don't get any artifacts in the scanner you won't get them on any game. Also the full load scanning is brutal, you will never reach temps like that during normal gaming. Doing 3dmark06 only maxed out at around 65c

 

Thats great... i was gettin worried my frame rate wasnt gonna be good at that res i love playin at 1680 it makes the game just look so much better. Thanks for the info..the 158 drivers do i get them from laptopvideo2go or nvidia direct

 

Bumpidy Wumpidy.

 

So it's looking like:

26.3% increase in core clock nets a 8% increase in performance
Scaling ratio: 0.304 performance % per clock %

30% increase in memory clock nets a 14% increase in performance
Scaling ratio: 0.467 performance % per memory clock %

So definitely seems to like memory bandwidth more, as would be expected with a bandwidth constrained card.

Also to note, you're almost at 8700M GT core clocks - so it'll remain to be seen whether 8700M GTs are actually binned 8600M GTs or if most 8600M GTs can reach those speeds anyways.

 

I think I've reached my maximum core clock of 633MHz. The memory's maximum is 520 (1040). That's quite a large overclock for both. It brings me back to the days when I had my old Radeon 9600XT.

 

I've finally found some drivers in XP that allow overclocking, so I'll post results when I get back from work.

 

What VISTA drivers and what tool are you using for overclocking? I have the 162.13 drivers from Laptopvideo2go and in Rivatuner, ATITool, and nTune, when I try to raise the clock speed, they just snap back to the stock speeds?

 

I am having the same problem.

 

Are you selecting the option in Rivatuner to run at start-up? Also, every time you raise the speed, you have to click Save next to that option to update it.

 

I have done all of that....How do you know if the clocks have indeed changed?