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ZM80-D upgrade

G

Galvin

2[H]4U
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Jan 22, 2002
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2,697
Well with the help of Sniper merc I was able to install my jerry rigged ZM80-D on my 6800gt. Only took 4.5 hours or so.

Anyway my first new temp readings.
Since I ran out of power connectors and didn't have any splitters handy. I plugged the zalman fan directly into a fan power connector. The fan is a tad noisy. But I dont think its much worse than the original fan on the card.
Zalman fan speed 2836
Room temp: 27c (80F)
Full load 400/1000
amb temp: 50c
GPU temp 76c
idle 370/1000
amb temp 38c
gpu temp 57c

GPU speed 400/1000

This is running dynamic branching which really heats your card up more than hdr does.

Shin Etsu was used on the core. And radio shack themal grease for the heat pipe connections.
 
I found a zalman fan adjuster that came with my zalman copper cooler. I put that in and have it velcrod to the back side of my case. Looks perfect. I can access the knob very easy. Just slide the panel off and adjust. Then I use asus probe and monitor the fan speed while I turn the knob.

And since the fan is attached to the mainboard fan connector. I can monitor the fan speed. So I found a good balance between temp and fan noise. Fan speed is 2481 with following full load temps:
room temp 27c (80f)
amb temp (51c)
gpu core (77c)
using dynamic branching demo
 
(claps)

he he, good job, get some pics up when yah get a chance

Edit: BTW you may want to split the power leads off to a molex adapter and make a single lead for rpm monitoring just to get the load off the motherboard, it would be the better way of doing it.
 
Dont have a digital camera. I thought about that but not sure how to do it. My exhaust fan works like that. It has a seperate wire that plugs into the mainboard so I can monitor the speed. Right now i'm only using 2 connectors on the board for fans. One for the cpu and one for the zalman gpu fan. No problems at all.
 
where did you get the dynamic branching demo? i am also looking for the high dynamic range one if you know where to find that one too. thanks.

right now my BFG GT doesnt go above 70 on anything like Doom 3 so I want to see what a good stress test would do.
 
Well it got a lot warmer today. Latest temps

dynamic branching demo used.

full load
room temp: 30c (83f)
gpu temp: 81c
amb temp: 55c

idle
gpu temp: 61c
amb temp: 43c
 
Stock cooling with dynamic branch demo

room temp 30c
gpu temp: 91c
amb temp 61c

in all temps my card is at 400/1000
 
Interesting. I wonder where the ambient temp sensor is on the vid card relative to the gpu. Notice how both the gpu and ambient temps are 10c higher with the stock cooling? What that's implying is that a large area of the card got 10c cooler, and not just at the gpu. A good thing.

I'd say a 10c gain is worth the $$$ for the Zalman. Especially since it can both cool better and be much quieter than stock.
 
I expect during winter time when my room temp will be around 65 degrees. The videocard at full load probably will barely break 70c.

The card would probably be slighlty cooler if the zalman cooler wasn't jerry rigged on. See what happens is when you put the card on like I did. The heat pipes that attach to the heatsink for the gpu they dont make contact with the big thin heatsink all the way accross. Only in the spot where its screwed down. And on the back its similiar. So thats probably cutting down a little bit of heat transfer. Probably not a huge amount. Its very slight.

But the jerry rig is very solid though :)
 
Galvin said:
I expect during winter time when my room temp will be around 65 degrees. The videocard at full load probably will barely break 70c.

The card would probably be slighlty cooler if the zalman cooler wasn't jerry rigged on. See what happens is when you put the card on like I did. The heat pipes that attach to the heatsink for the gpu they dont make contact with the big thin heatsink all the way accross. Only in the spot where its screwed down. And on the back its similiar. So thats probably cutting down a little bit of heat transfer. Probably not a huge amount. Its very slight.

But the jerry rig is very solid though :)
Click to expand...

Almost forgot about that heatpipe, next time you take it apart, bend the heatpipe out a little, its pretty soft and it doesnt hurt it any. I did the same thing on the one that I put on an X800 Pro card.
 
Not sure if I want to do it again. I already took it apart a few day ago :)

Its not as cool as yours. But i'll just wait for zalman to make a compatable cooler for the 6800gt and use that. Its working fine for now.

Thanks
 
Ok today it got much cooler. Anyway here is a list of temps
idle gpu temp 370/1000 : 55c

Clock speed: 400/1000

Dynamic Branching Demo Full load
Room Temp: 25c (77f)
amb temp: 49c
gpu temp: 75c

Room Temp: 29c (84f)
amb temp: 54c
gpu temp: 79c

Room Temp: 30c (86f)
amb temp: 55c
gpu temp: 81c

Interesting thing here is the gpu temp is in synch with the room temp.
Room temp drops 2c for example then the gpu temp drops 2c under fullload.
During the fall/winter/spring. 60f to 75f will be more comon of a room temp and my GPU temp full load should avg around 70 to 75c.
 
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