X1900XT-X

drak3

drak3

drak3

Associate
Joined
26 Jan 2006
Posts
1,502
Hello,

I water cooled my X1900XT-X and overclocked it to 688Mhz core / 792Mhz mem.

I use the EK full cover block, with the aluminum part for the VRMs.

However, when I run the card on full load I get the following temps:

GPU core: 46C
GPU Ambient: 46C
GPU VRM: 68C

these temps are from everest fed to my logitech LCD while 3D Mark is running.

Is it normal for the voltage regulators to be so high (don't know what they used to be on air tho!), since the GPU core and board temps are down to 46C now from 90C!! it used to be with the air cooler.

I used AS MX2 for the mount, and I remember applying some on the small chips under the pink heat sink. However, I did NOT apply any to those big chips (not cooled with air cooler, but now the aluminum part of the block covers them).

Any ideas?


Any veterans your info will be helpful, thanks :)
 
I get temps similar for the core on air! (S1 + fan) doesn't go above 50- not sure about other two. Overclocked to the same core level too.
 
Good to see it's up and running :)

Firstly did you screw down the aluminum part too (the screws from the stock heatsink should fit).

Secondly, I used the thermal tape from the stock heatsink for the VRM's. I couldn't get it off in one piece, but I was able to apply enough of it to each VRM to do the job.
 
No, I did not screw the aluminum part as it was "touching" from what I could see.

Which ones are the VRMs by the way? The small chips under the pink heat sink I removed? or the box like black chips in front of them?

Weird, I did apply paste on the small ones and it looked they touched on the aluminum, but I will screw it down now since it's doable without taking it out.

What kind of temps you used to get Cob btw?
 
Can't remember what my VRM temps were. But VRMs get hot anyway. Load core temp was usually about 45c.

The VRMs are the small 'shiny' chips that the very end of the aluminum bit sits on. I have the HIS IceQ3 version and it has a small dedicated copper heatsink for the VRMs.
 
Yeap, the shiny ones. Mine has a pink straight pink head sink on top of them. I removed that, cleaned that clay like paste and applied some fresh AS MX2.

I played a bit FSX to try the new clock, and is a lot smoother now with core temps 42C and VRMs 60C. I guess for game use they are fine since they get hot (60C is ok I guess).

I ll screw them down later and see if it improves, cheers :)

ps: CCC won't allow anything more than 688Mhz, and ATI tool somehow refuses to run the card in 3D mode :/
 
688mhz and 792mhz were as far as I could ever get with CCC too. Putting it under water made no difference. I haven't really played with ATI Tool as I could never get it stable under x64 Vista.
 
badbob said:
I get temps similar for the core on air! (S1 + fan) doesn't go above 50- not sure about other two. Overclocked to the same core level too.
Click to expand...

Can you please check your VRM temp on idle/load please?

Would be nice to have a reference measure.
 
Idle
GPU temp 28
PCB 30.4
VRM 43

PC been on for about 10 minutes..will do some gaming

Load
GPU temp 38
PCB 44
VRM 58

Left ATI tray tools, with the monitoring feature running whilst gaming-

GPU temp (max) 50
Enviroment (max) 38
 
Last edited:
Mine idles at 39C (GPU/PCB) and 55C VRM, but it is because of my water loop (water temp 39C). The VRMs tho look like they are NOT part of the block. I need to check the mount again I guess.
 
I run folding @ home GPU client for 1 hour and VRMs went to 70C and core only 48C.

I touch the water block and it felt warm to the touch! With 70C it should burn me!

The sensor is wrong or the VRMs do not touch the heatsink. Which is not the case as I can see them touch!

ps: I read somewere that VRMs are certified to run at over 100C and is "normal" to have them reach 100C under load.... well it works with 742core/918mem now so I guess is fine.
 
You must log in or register to reply here.
Back
Top Bottom