4870 Waterblock Options

[Eastcoasthandle]

You asked me to run Furmark and I've done that. What is it you are trying to find out here? Your request is vague.

[gabe]

Yea, but Furmark crashed on me with the stock cooler too. So even though there isn't, that looks to be the cause of the crashes with the HD4870.

Its sad that ATI didn't address the thermal concerns with U601 now in the wild users are having stability issues from this.

got it. thanks for clarifying. have you considered that your overclock might be too high?

I'll add this: it's possible, but unlikely that the thermal/mechanical team would make a blunder of this magnitude. These cards are validated under stress for months!

[CCC]

here is single 4870 with stock hsf just for a reference

[dnottis]

got it. thanks for clarifying. have you considered that your overclock might be too high?

I'll add this: it's possible, but unlikely that the thermal/mechanical team would make a blunder of this magnitude. These cards are validated under stress for months!

I wasnt overclocked for any of the testing. Furmark crashes at stock.

[dnottis]

You asked me to run Furmark and I've done that. What is it you are trying to find out here? Your request is vague.

Well just run the stability test and let it run a few mins - if you dont get the black screen capture the same thing you did before. You ran the benchmark utility and it was only a 60 second run. Once in awhile I could go 60 seconds before crashing - but consistenly I would crash anywhere from 40 - 90 second mark. One 60 second run might pass on yours, I just wanna see the temp and amperage draw (which only shows in the sensor screen btw - not on the OSD).

Check my pics where you see the GPU VRM @ 125c and GPU VRM at 72a draw happening. The OSD doesnt show the GPU VRM amperage draw.

here - bottom pic -
http://www.xtremesystems.org/forums/...5&postcount=57

[dnottis]

HERE IS A LINK TO MINE

that is single 4870 with stock hsf just for a reference

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[CCC]

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hmm, works for me.. not sure what is wrong

[gabe]

HERE IS A LINK TO MINE

that is single 4870 with stock hsf just for a reference

Invalid Attachment specified. If you followed a valid link, please notify the administrator

[CCC]

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sorry, fixed it

[dnottis]

sorry, fixed it

What brand name?

I have an RMA for refund I may just still do that. Mine is pulling 60-70amps. Yours is 50a. Something still not right with mine...

[CCC]

What brand name?

I have an RMA for refund I may just still do that. Mine is pulling 60-70amps. Yours is 50a. Something still not right with mine...

Visiontek, got it from bestbuy..

i have a 2nd 4870 coming tuesday but its a saphire.. im hoping i wont have any issues mixing the brands..

[Eastcoasthandle]

Well just run the stability test and let it run a few mins - if you dont get the black screen capture the same thing you did before. You ran the benchmark utility and it was only a 60 second run. Once in awhile I could go 60 seconds before crashing - but consistenly I would crash anywhere from 40 - 90 second mark. One 60 second run might pass on yours, I just wanna see the temp and amperage draw (which only shows in the sensor screen btw - not on the OSD).

Check my pics where you see the GPU VRM @ 125c and GPU VRM at 72a draw happening. The OSD doesnt show the GPU VRM amperage draw.

here - bottom pic -
http://www.xtremesystems.org/forums/...5&postcount=57

After 2 mins using stability test

[dnottis]

After 2 mins using stability test

Yea, there ya go 75 amps now. Doesnt crash at all?

Well since I had my RMA for mine I just ordered a new ASUS from ZZF for $269, there is a $30 MIR so $239 total. I'll get refund on the HIS I have now.

Gonna see if I get the same thing.

[Eastcoasthandle]

It's my opinion that the amperage reading may not be correct. After all, this version of Everest is a beta and the current retail version does not support the 4800 series yet. I believe we should wait until Everest release an official update. Or we see an update to ATI Tool (which I prefer). Reason being is that there are some temp differences between GPU-Z and Everest, for example. Your problem maybe heat related.

[babalouj]

Ah crap, my milled aluminum heatsink does not cover that chip. I suppose I can just put a ramsink on it. Here are the pictures of the heatsink I made. I used a manual mini mill. I still have to drill and tap the mounting holes. It cools the ram, the voltage regulators and the inductors. It looks crappy but its pretty good coming from a $300 mill that I borrowed from a friend.

[dnottis]

I wanna know how it performs when you get it running.

[dnottis]

It's my opinion that the amperage reading may not be correct. After all, this version of Everest is a beta and the current retail version does not support the 4800 series yet. I believe we should wait until Everest release an official update. Or we see an update to ATI Tool (which I prefer). Reason being is that there are some temp differences between GPU-Z and Everest, for example. Your problem maybe heat related.

Could be - oh well I have another one on the way. With that small 50mm and large ram sinks on everything I can for the first time run Furmark for over 1 min, 25 mins actually till I killed it. So it's heat related but that sucks. You are running the stock fan and red backplate with the water block right?

[babalouj]

I wanna know how it performs when you get it running.

I'd be willing to bet that it will outperform ramsinks.

[Eastcoasthandle]

Could be - oh well I have another one on the way. With that small 50mm and large ram sinks on everything I can for the first time run Furmark for over 1 min, 25 mins actually till I killed it. So it's heat related but that sucks. You are running the stock fan and red backplate with the water block right?

Correct, if I am not mistaken its a type of pressure fan, not the typical bladed fans.

[gabe]

Could be - oh well I have another one on the way. With that small 50mm and large ram sinks on everything I can for the first time run Furmark for over 1 min, 25 mins actually till I killed it. So it's heat related but that sucks.

can you leave the fan, but take the HS from the U601, just to see if it makes any difference?

[babalouj]

I can now run furmark at stock clocks 780/1000 (I have the msi OC version of the 4870). VRM temps are still out of control. But this is something I was not able to do before I made my heatsink.

[Eastcoasthandle]

^^ put a fan on that HS

[babalouj]

^^ put a fan on that HS

I have a 120mm fan blowing directly at the heatsink from about an inch away. It is getting enough airflow.

[babalouj]

gpu-z temps are 34C gpu, 45 sensor 2, 45 sensor 3 using ati tool and everest is 80C VRM. Furmark, gpu temps are 36C, 47 sensor 2, 47 sensor 3, 126 VRM. Nothing on my video card is 126C that I can feel. I will take a screen shot when my watercooling finishes bleeding.

[Yonzie]

I've sinked the chips as well and furmark no longer crashes after a few minutes (I could make it through the benchmark). Nice. Tested for 10 minutes, no sign of instability. Didn't check temps because the main site is down and I couldn't remember the forum URL to get the new everest
I used ~1"x1.5" sinks, one on the vitec, one on the pulse chips, one on the VRM regulator and one cut in half on the VRMs. And a 12cm 1200RPM fan.
They're attached with Arctic Alumina.
Thanks dnottis