The Official 7900 overclocking thread

man_from_uncle · 18 May 2006 at 22:06

nO}{8 said:
Time will tell! Im didnt get rid of my GTX's because I need the extra performance but because I want something new to tweak! and I just love overclocking The extra performance is just a bonus

That's a fair enough motivation in my book. I don't think you'll find a better tweakable top end card than the 7900gt (at least not for a couple of months).

pcknight · 19 May 2006 at 15:45

Is this good:

555 core 804 memory
9,203 3D Mark 05
81,000 Aquamark

This is with my 7900 GT 256mb card and a Venice 3500 at 2.5

nO}{8 · 20 May 2006 at 14:58

ok got my 7900gt and did the volt mod, infact I did it before I even slotted it in

Its running at 600/1680 without any artifacts or problems. I also fitted a Zalman vf700-cu after seeing the temps at load rise to 90+ degrees :eek:

Now theyre at 80 load. Running 3d05 I got 7255, which seems very low, any ideas?

man_from_uncle · 20 May 2006 at 15:15

nO}{8. Yeah, that is on the very low side. With clocks like that you should be getting 10k or so (with that processor speed). Have you set the nvidia control panel to 'High performance'? Your temps are also a lot higher than I would have thought healthy. I've done the 1.55v mod and with the vf900 I don't go above 60c. I know the vf700 isn't quite as efficient, but I wouldn't have thought it was that much worse. That heat could even be throttling your overclock and could explain the low score.

Monkeybutt.....I thought you were still thinking about what card to get? Anyway, your score is about right at that level with that CPU. You'll probably find that memory will go a bit further though.

kbc · 20 May 2006 at 15:24

nO}{8 said:
ok got my 7900gt and did the volt mod, infact I did it before I even slotted it in Its running at 600/1680 without any artifacts or problems. I also fitted a Zalman vf700-cu after seeing the temps at load rise to 90+ degrees Now theyre at 80 load. Running 3d05 I got 7255, which seems very low, any ideas?

What volts are you running through that? That's high temperatures.... mines on a 1.5v and hits 60C max I believe or perhaps a bit more... but nothing over 65C.

At stock I get 9723 in 3DMark05... (560/1650)... so yes - that's pretty low.

nO}{8 · 20 May 2006 at 15:48

Ive just found out that the vf700 was on low fan speed, bumping it up has lowered the temps to 60 load. Ive redone 05 and got 8100. It still seems low

I havent reformated for a year, so would a fresh windows help? Any other thoughts?

kbc · 20 May 2006 at 16:00

nO}{8 said:
Ive just found out that the vf700 was on low fan speed, bumping it up has lowered the temps to 60 load. Ive redone 05 and got 8100. It still seems low I havent reformated for a year, so would a fresh windows help? Any other thoughts?

I gather you're using the latest set of Nvidia drivers? I think I'm on 84.25.

nO}{8 · 20 May 2006 at 16:03

im using the 84.21's that came with the card. Im trying the latest betas now, also updating the chipset drivers.

*Update. Not difference:/ Ive sold my 7800GTX for a 7900gt and it clocks much higher but the scores the same :confused:

man_from_uncle · 20 May 2006 at 17:12

Well, my first thought is that you are still be throttled by heat. If turning the fan up gave you an extra 900 points in 3dmark05, then the chances are that heat is an issue. Not sure what experiments you can do to test this though.

kbc · 20 May 2006 at 17:30

nO}{8 said:
im using the 84.21's that came with the card. Im trying the latest betas now, also updating the chipset drivers.

*Update. Not difference:/ Ive sold my 7800GTX for a 7900gt and it clocks much higher but the scores the same

That's odd, and it's not like we're talking about 2006 where CPU makes a big difference. Ensure you run the tests on a fresh boot - or if worst comes to the worst - you could play with a reinstallation of Windows... hmm...

vocch · 20 May 2006 at 17:52

Well...got my second cooler today as i had to look around to find a compatable one as there was no way of using another zalman due to nowhere near enough room to fit it and the stock cooler is quite s**** in sli due to the extra heat...15mins of fear and it hit 71c :eek:

....anyway just done a run of 2DMark06 @ 1.4v and got 9635....not bad....just need a nice cool day to give it more v's.

nO}{8 · 20 May 2006 at 17:58

**UPDATE**

10158!!! http://service.futuremark.com/orb/projectdetails.jsp?projectType=12&projectId=2025960 :cool:

It was a driver issue after all, as it was enabling vsync even when I turned it off. VERY pleased now, just waiting for the second gt to arrive for some SLI fun

Im not going to go to 1.5v, 1.4 is fine for me. Ive heard a lot of cases of a capacitor on the back of the 7900gts getting really hot (80 - 90c) when you pump more volts through it.

Im chuffed to bits

kbc · 20 May 2006 at 18:02

nO}{8 said:
Im chuffed to bits

CONGRATULATIONS.

wellibob · 20 May 2006 at 18:07

Im going with causion after my 7900GT fell over itself at 1.55 volts, im lucky i didnt smoke it, 1.4 and 640 mhz tis plenty, and still cool

man_from_uncle · 20 May 2006 at 18:16

Well done nO}{8. That's bang on what you're due with those clocks. In SLi they'll knock the socks off your old 7800gtx set up.

And vocch, what can I say? dear me.....that's fast. I'm suddenly a lot more motivated to do the mod on my new card too.

nO}{8 · 20 May 2006 at 18:52

man_from_uncle said:
Well done nO}{8. That's bang on what you're due with those clocks. In SLi they'll knock the socks off your old 7800gtx set up.

And vocch, what can I say? dear me.....that's fast. I'm suddenly a lot more motivated to do the mod on my new card too.

thanks man, the mod is very easy and reversable, but you will need some conductive paint (got mine for 6.99) and a better cooler. The better cooler is worth it just to shut up that tiny fan anyway

man_from_uncle · 20 May 2006 at 19:05

I appreciate the advice, but i've already done the mod on my first card (that's how I know what you should have been getting at those speeds). I just went SLi last week and haven't done the same to my second one yet.

Just to give you a target, I got 11.4k in 05 with a single card with the 1.55v mod. Vocch got 11.7k. Mine wasn't gaming stable though so I went back a bit to 680/1670, which still scored 11k. Don't worry, there is plenty of room left in that core and your CPU should let you get to 11k no problem.

vocch · 20 May 2006 at 21:01

Thanks man....what kind of temps are you getting with your zalmans?.

nO}{8 · 20 May 2006 at 22:46

im getting 35 idle and 50 load. very impressive if you ask me. Almost 20c lower than stock cooler. Its about 3 times quieter as well.

kbc · 21 May 2006 at 01:10

man_from_uncle said:
I appreciate the advice, but i've already done the mod on my first card (that's how I know what you should have been getting at those speeds). I just went SLi last week and haven't done the same to my second one yet.

Just to give you a target, I got 11.4k in 05 with a single card with the 1.55v mod. Vocch got 11.7k. Mine wasn't gaming stable though so I went back a bit to 680/1670, which still scored 11k. Don't worry, there is plenty of room left in that core and your CPU should let you get to 11k no problem.

I'm currently only getting 10.6K on 1.5v @ 630/1800... I'd love to hit over 650MHz on core but would like it to be gaming stable as well... do you think I'd need 1.55v for it?

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