Overclocking 7800 Go - Page 2

That is not entirely accurate if it was we would have a thread full of horror stories right now.

Increasing the voltage increases the heat generated while running more current through the GPU. I also think it is debatable that there is a huge cooling problem, because again we would have a giant thread dedicated to those who have melted systems, and product recalls etc. While we would have liked to have a two pipe cooling system on the vanilla go 7800 like the GTX it is suitable for what we have.

It is safe and so far thuroughly tested to modestly volt mod to 1.2v and increase the GPU/Mem clocks well above the 250/650 or whatever the stock clocks are and not have any worries or burnouts.

Currently I was only able to get a stable clock of 325/907 @ 67degrees full load, I am now at a very modest (compared to others I have seen) 415/940 clock @1.2 volts and I just hit 78/79degrees full load. The threshold where the drivers would throttle back the cpu anyway is like 92 or something like that so.

The difference in performance by oc'ing like I did is quite a bit and so far as tested hours after hours it has been well within the specs for the thermal tolerance of this GPU..

Stock GPU only pushes at 250Mhz core/ 650Mhz mem about 20.8GB of bandwidth

I consider my OC to be modest compared to those I have seen in the forums
415core and 940 mem is about 30.08GB bandwidth at only about 6 degrees hotter. Thats 60% increase on the GPU and 78% on the memory with a 50% increase on overall data bandwidth... The end result really is how do games run afterward as well as synthetic benchmarks, in 3Dmark 06 I am getting almost 3500 (3496) at 78 degrees. I find the thermal scores to be acceptable and the 60 to 65% increase in overall performance from my stock score of 2322 is worth the effort.

I have some dumb questions, do you remove the drivers before doing the volt mod, do you change the clock speeds in the BIOS, and after you do the mod, which one do you use, the XG Mobile Forceware?

I can field one of those, atleast.

You change the clock speeds by flashing the BIOS on the video card.

my daily test

7800 go 350 900 5680 3d mark 05
7800go mod in bios gtx 350 1060 5400 3d mark 05 no artifct but 5400

any suggestions on my clock issue? Like how should I proceed upwards? What increments?
Thanks in advance

I wouldnt get too fixated on a particular number. You say you want 400/900, but your particular card may just not be capable of that.

If you insist on proceeding past the recommended overclock, you need to start by increasing core voltage. If youre at 1.2 and cant get the speed you want, step up to 1.3. As for what increments to use - the answer is to use the smallest increments that your patience allows. The smaller the jump the less likely you are to do irreversible damage to your components. Id go 5 on the gpu and 10 on the memory until you hit an OC that is no longer stable. Then go back to the last known stable OC and make sure its still stable. From there, go up by 1 until you find the ceiling for your card.

Keep in mind your system has cooling for a 7800 running the lower speeds at the lower voltage. Personally, I would stick to 1.2 and run it at the fastest speed you can while maintaining safe temperatures and not experiencing artifacts or system instability.

I guess that what I am going to have to do. So those getting past 400 on the core, that's after you run detect optimal settings?

Running the detect settings isnt necessary. You can do it by hand as well.

Which one did you get? I heard good news about the pac breeze. It's should drop temps by 5 deg. I got a Vantec Lapcool2, it drops my idle by 3 and about 5 on load. I mainly got it cause I could'nt use the pac breeze on my lap.

just got home with the pacificbreeze. Lowered my temps 6c, doing more tests, I will post more results later.

hi all... i was able to take my 9400 with go7800 at a maximum 435/950 and score a 6621 with 3dmark05.. I'm running on the 1.2 vmod. The card can clock higher but my power supply switches off while running the benchmarks.. 3dmark06 will always shut down my psu if i clock any higher than 410/920. I installed the latest ATI Tool beta and found that program particularly useful in setting the clock for the card. This way you don't have to go thru the hassle of testing each OC setting before you apply it, as you need to do if you OC thru the NVidia control panel. As I was saying, I think the card can go higher but is limited by the 90W power supply.. If I run the 1.3 vmod, the psu shuts down at anything above 390 core... so, for me, I don't see the point of going above 1.2..

Who r these people that keep talking about 100 deg? The throttle point is 93 on mine. (I hit it alot)

Did u change urs or just mistaken?

Well, here is what I came up with fiddling last night. The fps numbers arent meant to compare with your set up, its just a way for me to track the difference in speeds between my own testing. I ran the HL2 Lost Coast hardware test to get the numbers.

335/815@1.1v: 65.50fps
375/905@1.2v: 70.21fps
400/900@1.2v: 71.49fps

3d Mark 06 (trial, default settings) 2857 (1.6 core duo, 7800 Go @ 400/900)

In comparison, my desktop (amd64 3000+, 6600gt) scored 1472.

I havent pushed my setup to artifact point yet, the highest I have gone so far was 424/940. I will probably try 430/1000 tonight. The highest I have gotten in 06 was 3496

I just installed the forceware 84.56 drivers. I haven't overclocked at all, but my idle temp is fluctuating between 71 and 81 degrees. Why is it so hot? Am I doing something wrong?

I did the same install right now, but my temps at idle, no overclocking, are at 54.. and I'm running the 1.2 vmod.. Today I applied AS5 everywhere, it works wonders..