Bitcoin Forum

Hi i have pairs of 5970s in pc, keeping the temperature at about 70C in GPU and 90-100 v-in using CPUid HW monitor. clocking at 1.87V & 840core. win7 64bit.

I have bought a couple of the accellero Xtreme 5970's, any one else fitted them and notice worth while difference?

im concerned they dont blow air out the back, like the standard fitted fan, and that they stress the card causing a 1-2mm bend as the voltage cooling fins are to large! I have written to artic cooling and they are not british by origin and didnt really answer my question;



You wrote on 01/03/2011:

The VRM heatsink is too thick, and when installed it caused the card to bend, can this not be adjusted by shimming 1, 2 or ?? mm from the fins?

see this picture http://www.xbitlabs.com/images/coolers/ac-accelero-xtreme-5970/23_ac_597ont_big.jpg

I have 2 of these coolers and am reluctant to cause this bending, can the heatsink be modified??
by user, or preferably by yourselves



thier reply;

Dear ,

Thank you for your e-mail, we would like to help you regarding this issue.

We are sorry to hear that you have problem with one of our products.It is not recommanded to modify the cooler as the waranty does not cover any modification made to the cooler.

Sorry for the inconvenience.

We hope, this was helpful for you.

Best regards,
ARCTIC SUPPORT


worth the bother, other feedback most appreciated folks

I do not have personal experience with them, but FWIW ArtForz (one of the larger bitcoin miners) has said on IRC that out of 2 of his cards with these coolers, both failed after a few months of mining. Based on that I'd be wary of them.

Untill otherwise experience is reported, ill take this as good advise mate , cheers

I have one 5970 with it for almost 2 months. So far it works great, but it depends what you want. It works great for me as some additional mining on my desktop, because it's supersilent (fan 100 is much more silent than fan 50 on ref cooling, while temps stay at ~75C), and because I have well cooled case. It does not work well if you want some larger scale mining because it takes 3 slots instead of 2 and much more heat stays inside case. About bending card - not sure what you're talking about, I haven't noticed anything like this.

I have a Accelero Xtreme Plus (similar cooler) on my 6950 1GB (similar PCB to 6850) on my bedroom computer. Had to re-set the heatsink 4 times or so not due to any mounting difficulty with the HSF portion, but to changes and interference with other heatsinks (ramsinks, vrmsinks) on the board.

I've OCed it a bit, but can't get much farther than stock because the VRMs get way too hot. It runs about 15c cooler (at 860mhz core) than the stock cooler (at 836mhz core), but it is way quieter - fades into the background. The stock VRM cooler, which isn't integrated into the HSF like it is on the 2GB models, would get VRMs up to 120C and higher at stock clocks and voltages with OCCT. Replaced with the alu ones that came in the VR001 kit and now, with power threshold set to 10% above, at OCed settings, VRM temps top around 100c.(*) Core tops around 70c at the hottest part of the day, as opposed to 85c with the stock cooler.

Probably not worth the money unless the rig is physically near you so you have to hear it.

(*) VRM temps may not be reported accurately.

Nor am I, but I will try to answer anyway.  Basically, what 'true' said above.  From what I've read, you can't OC them an higher, and usually even less because of the VRM temps which are reportedly worse than stock.  So don't go by the GPU temp reduction alone.

I was looking at these yesterday for my two 5970's. Do they take up three slots? It says on the site they are crossfire compatible, so surely it's only two slots?

Anyway I decided to look into water cooling options instead, the risk of the card dying because of the bent PCB issues is was too high. In reviews the GPU core temp is lower, sound is a lot quieter but the VRM's are actually hotted than stock cooling. It's the VRM's which make the cards unstable, so it's these that need the most cooling and the Accellero doesn't do it well enough.

Your voltage is way to high btw. I have a 900Mhz overclock on 1.136v, however my pc is in front of an open window with a large desk fan blowing the cold air right into the case (Side panel taken off). Doing them dropped all the temps on the 5970 by 20c which is how I have a 900Mhz overclock. 1.28v is just way to high though.

I got about 25mhz more than I could with stock cooling, but yes, the VRM temps are the limiting factor. (On the 1GB 6950s, VRM cooling is sub-par anyway and was likely also limiting with the stock cooler.) If I got / fabbed a massive copper heatsink that fit under the aftermarket cooler I could probably get a little more out of it.

Water would likely run you cooler, so long as you could also cool the VRMs.

Don't the full blocks from EKG cover the VRM's? I've never seen someone with additional blocks on with these and they can ramp their cores right up to 1Ghz with ease. I'm actually going to build a four card system in the near future with dual 360mm radiators for mining on. This will then be expanded to a six or possibly eight card set up with three 360mm rads and two pumps.

Full blocks cover VRMs, but then you're stuck with those cards. When upgrade time comes, you have to upgrade blocks as well. So it depends on what kind of blocks you want.

5970's will be in the top GPU's for the next couple years, plenty of time to pay the blocks off and save for the next generation of GPU (Other than 6990 which isn't much better).

I disagree, but then again I just upgraded from an SLI 8800GTS G92 system that had full waterblocks on each card so... :)

Well the latest 6k series isn't near as good as the 5970 because of the architecture used. And it will be a few years until the next architecture is released so until then the 5970 will remain on top. Unless however someone makes an optimised miner for the 6990, at which point I will switch to that.