7970/50 Arctic Accelero Users

RizGB · 2 Mar 2013 at 10:45

which 7970 GHz Edition is best?

wazza300 · 2 Mar 2013 at 10:51

seems i have two or three rows of vrm's??

ill probably do this

LtMatt · 2 Mar 2013 at 11:07

That's strange wazza i don't have black chips on my vrms. Have you tried fitting the L shaped sinks on there? You want as much surface area as possible.

wazza300 · 2 Mar 2013 at 11:20

yeah tried but they dont cover both chips so well,its a powercolor card not a reference one,strange to have so many chips though

LtMatt · 2 Mar 2013 at 11:23

wazza300 said:
yeah tried but they dont cover both chips so well,its a powercolor card not a reference one,strange to have so many chips though

What are those other black chips to the right? More vrms? :confused:

I don't like your pcb wazz.

wazza300 · 2 Mar 2013 at 11:31

idk what they are,i dont like it either or the colour,but its a decent card 1.12v default and 86 asic

LtMatt · 2 Mar 2013 at 11:45

wazza300 said:
idk what they are,i dont like it either or the colour,but its a decent card 1.12v default and 86 asic

Furry muff. Well part of me thinks those other black chips should be covered but im not 100% sure. Have you had a look around on google?

wazza300 · 2 Mar 2013 at 11:55

yeah couldnt find the same card

i think ill wait now and look around for a thick copper heatsink that spans all three rows of chips and cool the lot in one,will be better than lots of small aluminium heatsinks,ill need to measure it up

LtMatt · 2 Mar 2013 at 11:57

wazza300 said:
yeah couldnt find the same card

i think ill wait now and look around for a thick copper heatsink that spans all three rows of chips and cool the lot in one,will be better than lots of small aluminium heatsinks,ill need to measure it up

Yeah im not sure if they're vrm's or not. Do you have one vrm on the left hand side like on the 7970 reference pcb?

wazza300 · 2 Mar 2013 at 12:01

cant see one?

i think theres only two rows of vrm's as they have the same numbers printed on them,the third row have different number,could be switches but have no idea

LtMatt · 2 Mar 2013 at 12:05

Those little black things above the black boxes with R47 are the left vrm's. Your card has a lot of vrm's. I'm confused.

wazza300 · 2 Mar 2013 at 12:10

LtMatt said:
Those little black things above the black boxes with R47 are the left vrm's. Your card has a lot of vrm's. I'm confused.

yep your right,two of those four chips have Ra22 printed on them same as the two rows of vrm chips at the other end of the board

the two remaining have Ra38 printed on them same as the third row of chips on the right of the board

so im guessing the Ra38 ones arnt vrm chips but ill probably cover them if i can anyway

MOOGLEYS · 2 Mar 2013 at 12:12

What does the original cooler cover ?

LtMatt · 2 Mar 2013 at 12:13

wazza300 said:
yep your right,two of those four chips have Ra22 printed on them same as the two rows of vrm chips at the other end of the board

the two remaining have Ra38 printed on them same as the third row of chips on the right of the board

so im guessing the Ra38 ones arnt vrm chips but ill probably cover them if i can anyway

Yeah it won't hurt. Maybe you should buy the Peter heatsinsk as well so you can cover all the chips. Either that or buy a spare set of accelero sinks.

wazza300 · 2 Mar 2013 at 12:15

ill look for a thick copper heatsink as itll be better than alu,then ill cover the rest with the accelero sinks

LtMatt · 2 Mar 2013 at 12:17

wazza300 said:
ill look for a thick copper heatsink as itll be better than alu,then ill cover the rest with the accelero sinks

Good luck finding one, many have tried and failed before you.

wazza300 · 2 Mar 2013 at 12:34

heres a good candidate,15mm wide 92mm long covers all the chips in one go,just have to cut the tops off at the right height

LtMatt · 2 Mar 2013 at 12:49

wazza300 said:
heres a good candidate,15mm wide 92mm long covers all the chips in one go,just have to cut the tops off at the right height

I'd make it no taller than 10mm so you don't have clearance issues. As you know those 12mm sinks were too close.

tommybhoy · 2 Mar 2013 at 13:14

Well done that man matt, got there in the end mate.

I think you need to invite neil over and get you plumbed up if you want to improve on what you have.

MOOGLEYS said:
What does the original cooler cover ?

+1

Check what the original cooling plate was in contact with.

wazza300 said:
heres a good candidate,15mm wide 92mm long covers all the chips in one go,just have to cut the tops off at the right height

You might not need to cut off anything if you wiggle the AC heatsink on, the fins from the heatsink have play in them and you should be able to slot them together, leaving the best results available without cutting..

The massive Peter VRM heatsink would be Ideal if you could machine this part off:

Plus you get the rest of the heatsinks in the pack to use too.

LtMatt · 2 Mar 2013 at 13:57

tommybhoy said:
Well done that man matt, got there in the end mate.

The permanent adhesive provides great contact.