Associate
- Joined
- 6 Dec 2007
- Posts
- 1,711
- Location
- Cambridge
Hi guys.
I recently bought a Musashi for my 4870 (the stock cooler is far too noisy for me).
I installed it last night, and all seemed well on the desktop (idle temps were a lot lower, no artifacting etc). I cranked up Furmark to test it, and it crashed after about 30 seconds (core load temp was much lower than with the stock cooler). I rebooted and ran the test again. Needless to say, it crashed, but this time I checked the VRM temperatures. All 3 VRM readings shot up to about 140c before it locked and crashed (in under a minute).
I installed the heatsinks on both sets of chips towards the back of the card as shown in the manual (I'm assuming these are the only VRM chips). I used a larger sink on the set of 2, and the longer, thin heatsink on the set of 3 chips. In hindsight there's no way that little sink could cope with temperatures that high...
I reinstalled the red plate from the stock cooler, and it was at least stable under full load. The VRMs hit around 118c after about 6 minutes. Definitely better, but still on the high end. I'm not particularly happy about using the stock heat plate to cool the VRMs and memory, but it's the best I can do at the moment. Any idea where I've screwed up? Also, is it worth adding sinks to the big chips in front of the VRMs? They're right under the fan on the stock cooler, so presumably they would benefit from better cooling.
Any help would be very much appreciated!
Cheers.
I recently bought a Musashi for my 4870 (the stock cooler is far too noisy for me).
I installed it last night, and all seemed well on the desktop (idle temps were a lot lower, no artifacting etc). I cranked up Furmark to test it, and it crashed after about 30 seconds (core load temp was much lower than with the stock cooler). I rebooted and ran the test again. Needless to say, it crashed, but this time I checked the VRM temperatures. All 3 VRM readings shot up to about 140c before it locked and crashed (in under a minute).
I installed the heatsinks on both sets of chips towards the back of the card as shown in the manual (I'm assuming these are the only VRM chips). I used a larger sink on the set of 2, and the longer, thin heatsink on the set of 3 chips. In hindsight there's no way that little sink could cope with temperatures that high...
I reinstalled the red plate from the stock cooler, and it was at least stable under full load. The VRMs hit around 118c after about 6 minutes. Definitely better, but still on the high end. I'm not particularly happy about using the stock heat plate to cool the VRMs and memory, but it's the best I can do at the moment. Any idea where I've screwed up? Also, is it worth adding sinks to the big chips in front of the VRMs? They're right under the fan on the stock cooler, so presumably they would benefit from better cooling.
Any help would be very much appreciated!
Cheers.
