4870 + AC Accelero S1 Rev2 = F..T..W.

willhub · 28 Sep 2008 at 23:56

wsh said:
I'm thinking of getting one of these but keep the OEM heatsink baseplate to cool the VRM and RAM. I've read the the heatsink needs to be modified to allow it to sit on the baseplate. Does anyone know whats involved?

To modify VRM heatsink to fit you will need an elastic band.

Using the red baseplate ain't very good, gets too high temps with it.

Frame352 · 29 Sep 2008 at 18:48

Well, sent OCUK a webnote asking about all this, and this is the reply I got;

"Dear ________,

I've checked the current stock in the warehouse and it does appear that there has been a change made to the heatsink with the latest batch. The current ones we have in stock have been altered slightly for better compatibility with older cards, however looking at your screenshots it appears this may have made it incompatible with the 4800 series.

The longer heatsink for the VRMs as shown in some of the screenshots has been split up into the four smaller heatsinks like the ones you have.

Regards,

__________"

Would be interested to hear from anyone who has bought an S1 in the past few days. This "change" pretty much renders the product useless for 4800 series cards. I'll get on to Arctic Cooling myself as well, see what they have to say.

wsh · 29 Sep 2008 at 18:53

I wonder if Asus will supply their new VRM sink as a part?

killer_uk · 29 Sep 2008 at 19:29

Green_Giant said:
Would be interested to hear from anyone who has bought an S1 in the past few days. This "change" pretty much renders the product useless for 4800 series cards. I'll get on to Arctic Cooling myself as well, see what they have to say.

Yeah, I was the one who checked into it for you, it's the first time I've noticed the change as well. My guess is that they have made it harder (impossible?) to use on a 4800 series card if their new cooler is due to hit soon, although I can't be sure of course.

Frame352 · 29 Sep 2008 at 19:49

killer_uk said:
Yeah, I was the one who checked into it for you, it's the first time I've noticed the change as well. My guess is that they have made it harder (impossible?) to use on a 4800 series card if their new cooler is due to hit soon, although I can't be sure of course.

Okay, thanks mate. I sent them a note via their website's technical support form. The AC website still claims the S1 is compatible with the 4870, but from my experience, with the new heatsinks, it isn't suitable for the 4870. So it will be interesting to see what they say.

EDIT: I should also point out that this change seems to be a mistake on AC's part, and I'm in no way blaming OCUK!

J1nxy · 29 Sep 2008 at 20:27

I wish I'd seen this thread before I installed mine yesterday. The core temps are pretty good the VRMs are through the roof. After about 5 mins they are hovering around the 115-120 mark and thats with the turbo module sat right above them. Better take the damn thing off

Frame352 · 30 Sep 2008 at 17:53

J1nxy said:
I wish I'd seen this thread before I installed mine yesterday. The core temps are pretty good the VRMs are through the roof. After about 5 mins they are hovering around the 115-120 mark and thats with the turbo module sat right above them. Better take the damn thing off

No word back from Arctic Cooling - if I don't hear from them in a few days, I'll have to send it back to OCUK for a refund. Which leaves me looking at stock cooling again

J1nxy · 1 Oct 2008 at 17:29

You heard anything from them yet?

Frame352 · 1 Oct 2008 at 17:44

J1nxy said:
You heard anything from them yet?

Nope, just in the door from work, and not even an auto response confirming they recieved my message. Will try again methinks.

ferret face · 2 Oct 2008 at 08:51

Hi guys,

I am trying to test the temps of my HD4870 with the latest GPU Z but mine doesnt show the VDDC temps, they are simply not there.. any ideas?

Ferret

J1nxy · 2 Oct 2008 at 09:03

Strange as beta4 which I used had them.

TheCenturion · 2 Oct 2008 at 12:44

does the accelero s1 work with the gtx 280?

willhub · 2 Oct 2008 at 12:45

anant_shah94 said:
does the accelero s1 work with the gtx 280?

No, as far as I know the GTX280's core is too big and holes are in the wrong place.

TheCenturion · 2 Oct 2008 at 12:46

willhub said:
No, as far as I know the GTX280's core is too big and holes are in the wrong place.

is there any aftermarket cooler on ocuk to use on the gtx 280?

willhub · 2 Oct 2008 at 12:48

anant_shah94 said:
is there any aftermarket cooler on ocuk to use on the gtx 280?

Not sure, have not looked, perhaps only thing available at the moment is water cooling for the GTX280's?

Porto · 7 Oct 2008 at 21:21

Hi,

Just new to this forum but I wanted to post in this thread.

Sometime ago I posted a message concerning my Powercolor hd4870 with an Accelero S1 rev2 on a German forum. This is the message:

http://www.forumdeluxx.de/forum/showpost.php?p=10012181&postcount=188

In the meantime I had two 120mm @1000rpm fans sticked to it, it did a great job but the temps not changed very much than with two 92mm @1400rpm fans. Until a few days ago I had the original red backplate on it but after reading some of the messages on this forum I thought I give it a try and go for the version without the red backplate... Well, what a surprise it was to notice that the temps dropped even further... Here some temps on different operating freqs of the GraKa (GrafikKarte) and two 92mm fans @ 1400rpm:

(min.) 500/450 with backplate: gpu 33c, vrm 44.... without backplate: gpu 32c, vrm 41c

(default) 750/900 with backplate: gpu 37c, vrm 50c... without backplate: gpu 34c, vrm 46c

(max.) 790/1100 with backplate: gpu 40c, vrm 56c... without backplate: gpu 36c, vrm 49c

As you can see the temps dropped with 1 - 4c on the gpu and with 3 - 7c on the VRM's. Especially the VRM's are quite important because they seem to rise quickly in Furmark but in games, much for realistic in my opinion, the VRM's won't get past 82c and that is well within parameters.

The standard stickpads on the sinks are sticking very well, even though I removed them twice already for refitting/rebuilding reasons. Very important is that the long sink for the VRM is attached with some pressure because only sticking it onto the chips won't get you low temps because of poor contact; just firmly (but gently) screw that heatsink to the board and you're good to go!

Porto

aslco · 7 Oct 2008 at 21:36

FlippinEck said:
erm, graphics card on the carpet??

Well as long as you keep it still and don't use it as a hoover....

Parsley · 7 Oct 2008 at 22:51

I've recently fitted the Accelero Twin Turbo to my 4870 but I have the same 4 smaller VRM heatsinks as where discussed above. I am hoping these will cool sufficiently but if not could you recommend me any other heatsinks to get?

Also would it be a good idea to place two of these on the ram and another two directly behind them on the back of the card? If they are getting that hot surely sticking them to the back of the card with some of the akasa tape would aid cooling? I'm assuming it isn't electrically conductive

.

h20 · 6 Jan 2010 at 15:48

are you supposed to put thermal paste between the chip and the heatsink stickypads?

if so i don't see how the heatsinks would stay and not come off

arctine · 6 Jan 2010 at 16:26

h20 said:
are you supposed to put thermal paste between the chip and the heatsink stickypads?

if so i don't see how the heatsinks would stay and not come off

As far as i know, the "sticky pads" are made to be a thermal conductor themselves so there's no need for paste.