Soldato
Just curious how they perform, i had to custom fit mine to my non ref 5850 and it turned out pretty well never hits above 50C on 1.28volts at 950/1200.
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Anyone stuck a prolimatech MK-13 on a 6900 series
- Thread starter bigjimmyauk
- Start date
Soldato
Ask drunkenmaster. He was talking about fitting his but I don't know if he has yet. You will need a small heatsink to the left of the top row of memory banks as well though.
Just wanna bump this before it goes back another 5 pages.
Caporegime
- Joined
- 18 Oct 2002
- Posts
- 33,188
Yeah, stuck one on, its not bad, bit weird, I seemed to be getting much higher VRM temps at first but they's since settled down into being decent temps. VRm temps were 20C higher than core, 10C higher at idle for the first couple boots then they went to same at idle, maybe 10C higher in Crysis. Maybe the akasa frag tape becoming better after heating for a while, honestly no clue.
Using a few heatsinks from the Arctic cooling 6970 compatible pack, basically a £6 pack of sinks to go with their top cooler, you can buy it separately, used cheapo Akasa thermal tape.
Not sure I've got the best contact on the core as temps aren't great, and they seem to be heating up pretty damn fast when I get the voltage up above 1.2v, compared to a 5850 that is.
Stock type speeds though(6950 with shaders unlocked) it dropped from circa 80C under load to, 45-50C, at just over 6970 clocks/voltage it seems to be rising in temps very quickly in Crysis 2, hitting mid-high 60C's under basically 100% load. Got two quiet fans on it.
I don't know, it is a pain in the rear to mount as you're trying to keep good contact but the way you thread the screws through into the sink is the worst way to do it. Most other sinks have the screws on the gpu side so you just push the card down on the sink then hold in place to do up the screws, the other way around you're trying to thread tiny screws into tiny holes you can barely see while trying to keep good contact.
If you haven't bought one, I wouldn't, if you had it on the old card, ah, just saw from sig you did, then it will work and its certainly better than stock, by a decent margin. But I seem to be having trouble going for high clocks as voltage is just causing the temps to go way up and its not completely stable.
Performance on the 5850 was awesome with this sink, so might remount it and see if I get better temps. On the 5850 it was down from again 80c or so loaded with around 900 core and overvolt, to around 40C load, then I could go way up to 1050Mhz, a much higher voltage and still sub 50C load.
Using a few heatsinks from the Arctic cooling 6970 compatible pack, basically a £6 pack of sinks to go with their top cooler, you can buy it separately, used cheapo Akasa thermal tape.
Not sure I've got the best contact on the core as temps aren't great, and they seem to be heating up pretty damn fast when I get the voltage up above 1.2v, compared to a 5850 that is.
Stock type speeds though(6950 with shaders unlocked) it dropped from circa 80C under load to, 45-50C, at just over 6970 clocks/voltage it seems to be rising in temps very quickly in Crysis 2, hitting mid-high 60C's under basically 100% load. Got two quiet fans on it.
I don't know, it is a pain in the rear to mount as you're trying to keep good contact but the way you thread the screws through into the sink is the worst way to do it. Most other sinks have the screws on the gpu side so you just push the card down on the sink then hold in place to do up the screws, the other way around you're trying to thread tiny screws into tiny holes you can barely see while trying to keep good contact.
If you haven't bought one, I wouldn't, if you had it on the old card, ah, just saw from sig you did, then it will work and its certainly better than stock, by a decent margin. But I seem to be having trouble going for high clocks as voltage is just causing the temps to go way up and its not completely stable.
Performance on the 5850 was awesome with this sink, so might remount it and see if I get better temps. On the 5850 it was down from again 80c or so loaded with around 900 core and overvolt, to around 40C load, then I could go way up to 1050Mhz, a much higher voltage and still sub 50C load.
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Thanx very much for a detailed report appreciate it. i did notice on my 5850 while testing that above 1.3v was pushing the thermal limit of the mk-13 too much. I settled on 950/1200 at 1.25V and that gives me temps around the 50c mark only exception being metro 2033 on very high which pummels it to 60c. Not really played enough of crysis 2 to test the heat levels on it but next time i play i will keep afterburner open and see what happens.
i have mine set with 2x1000rpm fans attached to the underside blowing on the ram through the sink. then my 110CFM side panel fan on my haf does the rest.
Have you thought about fitting a dedicated VRM cooler, prolimatech were supposed to be bringing one out with the mk-13 but it never appeared
Soldato
The aluminium heatsinks that come with the MK13 are terrible, I swapped mine for enzotech pure copper ones, infinitely better quality and they actually stick well too. I used both the standard and low profile ones.
Caporegime
- Joined
- 18 Oct 2002
- Posts
- 33,188
On the 5850 I was using one of the Thermalright vrm coolers, forget which one its called, but one where the sink basically sat about 2mm infront of my IFX-14 cpu cooler so VRM temps were awesome. IT doesn't ruddy fit on the 6950 as the higher pieces to the left of the VRM's is higher on the 6950. In the end I couldn't be bothered to cut the vrm cooler up though I got the impression if I cut that part off it would probably work fine and I don't have a decent none broken hacksaw around with a metal cutting blade so can't cut the VRM sink easily either.
THe VRM temps are actually not bad, considering half the reviews would show better overclocking on 5870's but show worse than stock VRM temps pushing 100C or more, those things are designed to take some serious heat, the 6970/50 VRM's certainly run cooler by a huge amount. The painfully small looking heatsinks I'm using are probably running as hot as the Thermalright cooler on the 5850, though the Prolimatech 5870 heatsink ran a good 15-20C hotter (about the same as the stock sink) so the Thermalright was certainly a good cooler, the new VRM's are massively improved for sure.
I think, despite its size, the prolimatech just starts to gain too much heat under a 6970 with +20% powertune and higher voltage loads. A 5850 + 1050Mhz + 1.3v was probably around the 210-220W mark, and thats about borderline for the heatsink, the 6950 unlocked shaders +1.225v seems to be a step too far, you're talking about pushing probably 260-280W, judging by numbers from reviews in Furmark, I NEVER run furmark, evil program and entirely pointless so realistically I'm probably pushing 30-50W less on each card, so the Prolimatech is probably capable at 180-200W but just overloaded at 230-240W.
My main gripe with the sink is as I said, due to the mounting method, its incredibly ackward to get the screws connected without making contact between gpu + thermal paste and the cooler, then once they are attached you can push them together and tighten the screws. To be honest I'm sure contact is relatively good as the sink gets fairly hot, I probably use too much paste to overcompensate for the potential problems.
THe arctic cooler is certainly a much bigger sink, but its generally thicker fins IIRC so isn't top notch in terms of quality.
One of the other issues with the Mk13 is fans, I was using 2x80mm fans , Antec's on the low mode so I couldn't hear them for the 5850, to get decent vrm/gpu temps I was using the medium mode which was louder than anything else in the computer. Moved to 2x120mm's and they just aren't that good, but quieter. I've seen reviews showing 2x80mm work better due to the airflow being forced over the sink and much smaller deadspots. Basically the sink could be significantly bigger to really gain the advantage of bigger fans. 2x120mm fans with much more airflow at the same noise, but most of that air isn't going through the sinks, temps haven't improved in the slightest, just noise.
THe VRM temps are actually not bad, considering half the reviews would show better overclocking on 5870's but show worse than stock VRM temps pushing 100C or more, those things are designed to take some serious heat, the 6970/50 VRM's certainly run cooler by a huge amount. The painfully small looking heatsinks I'm using are probably running as hot as the Thermalright cooler on the 5850, though the Prolimatech 5870 heatsink ran a good 15-20C hotter (about the same as the stock sink) so the Thermalright was certainly a good cooler, the new VRM's are massively improved for sure.
I think, despite its size, the prolimatech just starts to gain too much heat under a 6970 with +20% powertune and higher voltage loads. A 5850 + 1050Mhz + 1.3v was probably around the 210-220W mark, and thats about borderline for the heatsink, the 6950 unlocked shaders +1.225v seems to be a step too far, you're talking about pushing probably 260-280W, judging by numbers from reviews in Furmark, I NEVER run furmark, evil program and entirely pointless so realistically I'm probably pushing 30-50W less on each card, so the Prolimatech is probably capable at 180-200W but just overloaded at 230-240W.
My main gripe with the sink is as I said, due to the mounting method, its incredibly ackward to get the screws connected without making contact between gpu + thermal paste and the cooler, then once they are attached you can push them together and tighten the screws. To be honest I'm sure contact is relatively good as the sink gets fairly hot, I probably use too much paste to overcompensate for the potential problems.
THe arctic cooler is certainly a much bigger sink, but its generally thicker fins IIRC so isn't top notch in terms of quality.
One of the other issues with the Mk13 is fans, I was using 2x80mm fans , Antec's on the low mode so I couldn't hear them for the 5850, to get decent vrm/gpu temps I was using the medium mode which was louder than anything else in the computer. Moved to 2x120mm's and they just aren't that good, but quieter. I've seen reviews showing 2x80mm work better due to the airflow being forced over the sink and much smaller deadspots. Basically the sink could be significantly bigger to really gain the advantage of bigger fans. 2x120mm fans with much more airflow at the same noise, but most of that air isn't going through the sinks, temps haven't improved in the slightest, just noise.
Hi all, just picked up a Sapphire 6950 yesterday. Had the Mk13 already fitted to my old gtx280 so was thinking of swapping it to tje Ati.
I can't seem to find much info on how many ramsinks or other heatsinks will be needed, havnt taken the stock cooler off yet, wanted to find out a little more before I do that.
I am guessing that it would be ok to buy some new thermal pads and re-use the sinks that came with the Mk13?
I can't seem to find much info on how many ramsinks or other heatsinks will be needed, havnt taken the stock cooler off yet, wanted to find out a little more before I do that.
I am guessing that it would be ok to buy some new thermal pads and re-use the sinks that came with the Mk13?
How you getting on with this mate, just got my 6050 twin fozzy 3 and thinking of trying the prolimatech on there
loud and still gets quiet hot