HD4870 What to put on those VRM's?

[ouzodan]

Hi Quick question really.

Ive had enough of the noise the stock fan on my HIS 4870 creates, I have a Zalman GV1000 which I was using on an old HD3850AGP Jobby but it hasnt been used for a year so checking Zalmans site I can stick it on my 4870

Im aware that the VRM's on this board need cooling, Basically been moochying about and found two Heatsinks that I can use:-

ZM-RHS70
ZM-RHS90

Am I right in thinking either will go on a HIS HD4870 512mb? I was all set for the 70 but then saw the 90 and Im thinking what is that extra bit of heatsink covering.

Thanks for any advice.

 

[kerrgreg]

have you thought of using the standard VRM sink thats attached i think people get better results after they change the rest of the heatsink as the air flows better or something.

 

[ouzodan]

Ive read that too but to be honest I havent taken off the stock cooler so I suppose its well worth a look & see if it will all go together.

 

[Ice Rich]

I'm using a 4870 saphire with a T-rad2 fitted + 2 80mm fans. The trad comes with a lot of heat sinks for you to attach. I bought some aftermarket conductive tape and attached them all over the card. I've never seen my VRM go above 65 load.

 

[95thrifles]

Enzotech are the best, but not sold here unfortunately

 

[beefybarn]

Zalman do a specific heatsink for the vrms on the 4870 and 4890

 

[tommythetim]

I used an ZM-RHS70 on a stock sapphire 4870 512mb with an ac twin turbo and both combined done a great job. Without the ZM-RHS70 though my VRMs were cooking so be careful.

 

[ouzodan]

Thanks for the replies, I decided to go with the GV1000 & Zalman RHS-90 Heatsink, got it all fitted on my lunchbreak, & it actually looks quite smart just ran the Crysis benchmark tool and temps stay about the same as it was before except I have the fan set to its lowest rev compared to quite high before & its so much quieter.

Whats a good program to check Vrm temps? im using the latest version GPUZ but beyond GPU Temp I dont have a clue what im looking at.