GPU reached max but is it heat or Volt???

[Mini]

Well... I finally got my SLK900U modded and stuck on the thing.. But now the problem is that i cant get over 430MHz on core...

My old card reached 451Mhz with zalmans 80HCP or what its name is.. Everything over 451 would make artifacts...

But with my new card, when i go over 430 it just freezes... Is this a heat problem or a voltage problem???

I dont really want to make a Vmod if its heat because that would obviously just cause more...

[Reflex1]

surely cant be heat with that beast on it.

but of course even lower temps. wud help.

get a pontiometer and check the core voltage ...and research whether its too high or low.

but i think u musta got a bad card.

[Mini]

A pontiometer???

i'm not exactly an xstream OC'er, by that i mean Vmods and how cards are built up and so on... I just use the options i have in front of me...

That was my thought... I must have a bad card... But THIS bad??!!

Just sux... I really had hoped 4 sumthin better...

But isnt there a way i can check if its 2 hot?? The SLK-900U is not hot at all... Its only about bath temperature...

[enzoR]

maybe bad contact on the core?

post some pics!!!

[Mini]

Nope... There isnt bad contact... Had that in the begining and then it made artifacts at stock speeds... Tried again and i reached 420 with artifacts... Removed the thing and started all over and i reached 430... I can budge it a mm... Hehe...

Sure ill post pics if i can get the cables and all the crap out of the way :P

And i need a cam 2... See if i can find it... Only 1 negative about it... I only have 1 PCI slot

[enzoR]

what fan are you using on it?

[Mini]

Read the sig dude...

[glock19owner]

Didnt read anywhere about you taking the shim off when you installed the SLK900...if that is the case and the shim is still on...then the SLK wont be making direct contact with the GPU since the GPU sits under the shim...that is why the stock heatsink had the raised lip in the center of it...so it can fit over the shim to make direct contact with the GPU...

[Mini]

Well i tried to measure it and the GPU was exactly as high...

I didnt take it off because last time i tried i made a cut just under the shim and there was mass artifacts..

How would you take it off??? I just used a thin hobby knufe but it didnt work... There should be good contact... When i remove the SLK-900U you can see that it has been pressed down on the GPU(Paste)

But can that be the problem??? I am quite sure that it has good contact...

[glock19owner]

Yes that is the problem actually...they might look even...in reallity the GPU is slightly under the shim...and since the SLK doesnt have the raise on the heatsink, like the factory heatsinks...or VGA's...the SLK is not making full contact with the GPU...this is why the SLK is getting hot and the OC has dropped...but goes back up when you reinstall the factory heatsink...

And people have stated you can use dental floss to slowly pry the shim off...

[bias_hjorth]

Originally posted by glock19owner
Didnt read anywhere about you taking the shim off when you installed the SLK900...if that is the case and the shim is still on...then the SLK wont be making direct contact with the GPU since the GPU sits under the shim...that is why the stock heatsink had the raised lip in the center of it...so it can fit over the shim to make direct contact with the GPU...

actually that varies from card to card.. I´v had 2 9800pro´s and on both the core was above the shim.. On the 9700 card series its another talk..

[glock19owner]

Not taking away from your post...but did you actually measure them or did you do a eye test...

The reason why I ask is...mine looked like it was possible slightly higher...but when I actually miked it...it was just slightly under the shim...which is where is should of been since the shim is supposed to be sitting slightly higher to protect the core...

[bias_hjorth]

yes I did slighty lower than the VPU... could be on gigabyte cards only..

[Mini]

Well i used some item and it touched the GPU after what i could see...

I did never say that my SLK didnt touch and my stock cooler did... Neither that my OC goes up with the stock cooler... I said that my OLD 9800pro with the zalman ZM 80HCP(alu) (Wich by the way doesnt have a lowered part) i could OC to 451... My new is only 430(Yes this can varrie) but i didnt think it would be SO much... Never noticed its lower... better check that when i got home..

But my SLK is getting warm... And you can see it has been pressed down on the GPU because of the cooling paste(AS5)

Dental Floss??? The stuff you use to rinse teath?? Really.. That sounds far out...

[bias_hjorth]

you could just have a seriously bad card.. a tad of volt modding and you´ll be up and rolling

[glock19owner]

Originally posted by bias_hjorth
yes I did slighty lower than the VPU... could be on gigabyte cards only..

Thats interesting...thanks for the heads up...

Originally posted by Mini
Well i used some item and it touched the GPU after what i could see...

I did never say that my SLK didnt touch and my stock cooler did... Neither that my OC goes up with the stock cooler... I said that my OLD 9800pro with the zalman ZM 80HCP(alu) (Wich by the way doesnt have a lowered part) i could OC to 451... My new is only 430(Yes this can varrie) but i didnt think it would be SO much... Never noticed its lower... better check that when i got home..

But my SLK is getting warm... And you can see it has been pressed down on the GPU because of the cooling paste(AS5)

Dental Floss??? The stuff you use to rinse teath?? Really.. That sounds far out...

Sorry, I thought I read in another thread were you stated that when you put the stock HS back on it went back up to 430...

And yea...I find it hard to believe also...but most people I ahve talked to that has removed the shim has stated to use dental floss....

You could always PM hell fire about doing the v mods on your 9800 if you dont feel safe enough doing them yourself...

This is my cooling setup...



2x60mm fans...1 YS Tech 40mm fan...set to overlap to help cool the neck of the VGA...1 Tt 32CFM fan to help cool the back...

Also have a side 80mm intake fan blowing directly across the card...

I can run it at 500Mhz core (no v mods at all) for 3 or 4 01/03 runs...then I start to get the little white specs in nature (03)...or rips in dragon (01)...Memory runs at 387 stable without any ramsinks...

Gaming I run at 480/380...

7242

EDIT*...sorry about the pic size...forgot to resize it...

[Mini]

what heatsink is that your using???

Mine is as you probably know pure copper... So it should be a better heat leader...

Where is that 40mm fan???

you could just have a seriously bad card.. a tad of volt modding and you´ll be up and rolling

Hmm... Are you sure that its because of that... Thats why im asking here... Vmod=More heat... If heat is my problem then Vmod would mean less Mhz right???

But i seriously dont think its heat... This is a big CPU cooler :o/

Who is hell fire??? Can he modd it??? Where is he in the world??? I live in denmark... So shipping the card to US must cost 30-50$

[glock19owner]

Sorry...that was a typeo...that was meant to be "60mm-40CFM"

And that is/was a VGA silencer...

As for Hell-Fire...he is located in the states...so I guess that option would be out of question for you...

But here is his thread anyways...

And the only way to really tell right now...is for you to measure with a scope...if possible...to measure to make sure the GPU is not slightly sitting under the shim...

If you dont have any tools to get the exact measure...you can do this...

Get something that is perfectly thin and flat...like the edge of a ruler...then put a small layer of thermal past on the GPU...and I mean a very small amount...lay the ruler on its edge and see if it leaves a imprint in the thermal paste...if it does then you know the SLK would be making good contact...if it doesnt...then you know the shim is the major cause...

*I just used a ruler as a example...but anything that is non conductive that is flat like the edge of a ruler...and is level...will work...

[bias_hjorth]

Originally posted by Mini


Hmm... Are you sure that its because of that... Thats why im asking here... Vmod=More heat... If heat is my problem then Vmod would mean less Mhz right???

But i seriously dont think its heat... This is a big CPU cooler :o/

Who is hell fire??? Can he modd it??? Where is he in the world??? I live in denmark... So shipping the card to US must cost 30-50$

I cant be 100% sure cause it could be a bad mouting...
Btw I am sure the someone in DK could mod your card...
and yes the heat would go up as so would the VPU clocks

[enzoR]

how warm is the HS getting?

[pkrew]

Probably either bad contact or just a bad card. I didn't really see what you got with the stock hsf on your card and how did you mount your 900u. You might also try a fan with higher cfm as the zalmans are very quiet, but usually not very strong. I think most of the 9800 series card the gpu is above the shimm

[gkiing]

I'd have to say bad contact, It wouldnt hurt to remove the shim (but make sure you do it properly).

[Crankster]

V-mod it, in denmark you have a few fine overclockers. Tom Holck for example, maybe he is willing to fix you up for a small fee?

[EnJoY]

It isn't heat. Cards freeze because of lack of voltage. Give it more volts and it will continue to fly upward and onward.

[sandman]

I'm going with volts, heat will usually give you artifacts. Freezing is just a lakc of volts.