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7950 Vapor X Voltage Locked? - Page 93

post #921 of 1056
Does anyone know dimensions of the memory chips on these cards? I didnt think to measure mine when I had it open.

Trying to figure out if 60x50 is enough pad for all 8. I'd guess theyre something like 25x20 ea?
post #922 of 1056
Ok well I am getting ready to order my stuff and this is what I'm thinking:

100x150x1mm Fujipoly Extreme Pad
+
Either
http://www.ebay.com/itm/5pcs-20x21x15mm-High-Quality-Aluminum-Heat-Sink-For-Module-Electronic-H61-/190710367954?pt=LH_DefaultDomain_0&hash=item2c673946d2#shId
Nice and tall considering the height, otherwise taller heatsinks were 28x28mm plus, and the room available on the rear of the PCB is just about 28mm.

or
http://www.ebay.com/itm/New-8x-Silver-Aluminlum-Heatsinks-Cooler-for-VGA-Card-Xbox-360-RAM-Memory-/321077131743?pt=LH_DefaultDomain_0&hash=item4ac1b039df
Small.. but I figure that might be a nice thing for getting them to stay?

or
http://www.ebay.com/itm/100x25x10mm-High-Quality-Aluminum-Heat-Sink-For-Computer-Electronic-H59-/200801993333?pt=LH_DefaultDomain_0&hash=item2ec0bb4275
Huge, and 1 piece for easy installation and stability.. is this the best option? However I am most worried this one would have issues with contacting other metal, and that isnt good...

Now, to avoid contact with metal.. is it ok then if I layed a bit of Fujpoly across a considerable width [Like 25mmx100mm] of that area? This should not be conductive?


I was thinking of the pink area if I get the large single piece, or pink and orange if I get multiple pieces...

Thanks for any and all help smile.gif
post #923 of 1056
Derpenheimer I wouldn't worry about cooling the back part of the pcb as mush as cooling the front. My VRM temps have gone down alot by focusing on the front side VRM.


Also if you use the small stick on heat sinks you will not be able to use fujipoly thermal pads with them.
B.K.T.
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B.K.T.
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post #924 of 1056
Quote:
Originally Posted by bigsnyder View Post

Check this post

Just don't forget to remove that tag after rebooting or just make a new shortcut.
Thanks. I'll try it out. Would you consider below 1.3v (measured) voltage safe? How do these chips handle over volting?
post #925 of 1056
Anyone try out the new 3L version of the Sapphire 7950's?

http://www.newegg.com/Product/Product.aspx?Item=N82E16814202026

I know the 2L is voltage unlocked, and I had a Vapor-X previously that was voltage unlocked if using Trixx. Should I give the 3L a go for research purposes or should I go with the faithful Vapor-X or 2L?
post #926 of 1056
Quote:
Originally Posted by SonDa5 View Post

Derpenheimer I wouldn't worry about cooling the back part of the pcb as mush as cooling the front. My VRM temps have gone down alot by focusing on the front side VRM.


Also if you use the small stick on heat sinks you will not be able to use fujipoly thermal pads with them.

Its so cheap and I will have extra pad that will only dry out and end up in the garbage, so I figure why not? Even a 10c reduction isnt enough. That drops my 1275 core load temps from a max of 107c to 97c. Not quite into my "safe ground" of <90c.

Do you mean that these smaller ones will just not have enough mass to get good contact [Unless I find some crazy way to tie them down]? Or that they are meant for direct contact? It didnt say they came with tape on the bottom - I did see a few that did but they werent very good fits.
post #927 of 1056
Quote:
Originally Posted by Derpinheimer View Post

Its so cheap and I will have extra pad that will only dry out and end up in the garbage, so I figure why not? Even a 10c reduction isnt enough. That drops my 1275 core load temps from a max of 107c to 97c. Not quite into my "safe ground" of <90c.

Do you mean that these smaller ones will just not have enough mass to get good contact [Unless I find some crazy way to tie them down]? Or that they are meant for direct contact? It didnt say they came with tape on the bottom - I did see a few that did but they werent very good fits.


If you plan on using the fujipoly you will have to remove any sticky/thermal tape that may come on the heat sinks and you will have to figure out how to secure the small heat sinks down with the fujipoly. It will not be an easy task and may not be possible.


Not sure what you have in mind.
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B.K.T.
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post #928 of 1056
Quote:
Originally Posted by Derpinheimer View Post

Its so cheap and I will have extra pad that will only dry out and end up in the garbage, so I figure why not? Even a 10c reduction isnt enough. That drops my 1275 core load temps from a max of 107c to 97c. Not quite into my "safe ground" of <90c.

Do you mean that these smaller ones will just not have enough mass to get good contact [Unless I find some crazy way to tie them down]? Or that they are meant for direct contact? It didnt say they came with tape on the bottom - I did see a few that did but they werent very good fits.

I think this can be done, but surely some DIY involved :-). I'd go with the 10cm long heatsink. The PCB is about 9.5cm long, and you probably also will have a collision with the ram sockets, so you will have to file down and/or cut the heatsink to fit.

I would then clamp it down with a piece of bent wire which would hold on the stock vrm HS. Something like this:
post #929 of 1056
@SonDa5: Yes it definitely wont be easy. No matter which way I go, I think I would want the Fujipoly just to avoid contacting more than 1 thing. If this touches the black chips on the back, its fine [Im guessing] but if it touches a screw, or solder point, Im guessing that -> short?

My idea was just line them all up and then put some fishing line or something of that sort thru the fins, and tie it down to something to get pressure and stability.

@glina: Bent wire? What do you mean by that?

Also, yeah, since there is screw at one end it will block it from reaching the end [towards the RAM]. I know it will hang over the side a bit. I have the space in my case for that, so no biggie. No tools to file it down unfortunately :[


What about insulation tape? then I really wouldnt have any risk?
Edited by Derpinheimer - 2/27/13 at 8:58am
post #930 of 1056
Quote:
Originally Posted by Derpinheimer View Post

@glina: Bent wire? What do you mean by that?

Also, yeah, since there is screw at one end it will block it from reaching the end [towards the RAM]. I know it will hang over the side a bit. I have the space in my case for that, so no biggie. No tools to file it down unfortunately :[

Get some wire (fence wire from a diy store?) and bend it with pliers to create a clamp, similar to what I illustrated.
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