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Twin Turbo on 4890 results.

Polarman

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I will make this short.

I took my Accelero Twin Turbo off my old 4870 (Currently on sale) and decided to try it on my 4890.

The Twin Turbo fits with no problem.

Ram sinks, no problems there too.

VRM on the other hand, that's a slight problem. They are 5 of them and 2 of those are stupidly small. While the sinks do hold, i don't think that they are sufficiently cooled.

I ran Furmark for stress testing with both the stock heatsink and the Twin Turbo.

Stock fan: PASSED went up to 90 degrees with fan speed hovering around 50% (automatic)

Twin Turbo FAILED went up to 88 degrees with fan speed set @ 75% (manual) then LOCKED UP. Did not try fan at 100% btw.

I really think that the VRM's are not being cooled sufficiently resulting in overheating followed by complete lockup.

The Twin Turbo may keep the GPU running cooler and quieter but i don't think that it's really helping the rest of the card and the heat inside the case. I'm going to put the stock cooler back on with better thermal paste this time. The Twin Turbo is better for the 4870.
 
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I was wondering about coolers for this.... I like how the stock cooler works It just sounds like a F111 about to break the speed of sound when the fan is @100 percent :)
 

Polarman

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Processor AMD Phenom II 975BE
Motherboard MSI 890FXA-GD65 (Bios 18.7)
Cooling Zalman CNPS 9700 Led
Memory Gskill 8GB DDR3-1333 (8,8,8,21)
Video Card(s) MSI HD6870 Hawk
Storage WD Raptor 250 - WD RE4 500GB
Display(s) Samsung T240 (1920 X1200)
Case Silverstone Raven 2
Audio Device(s) Realtek ALC892
Power Supply PC Power&Cooling Silencer 750 (Red)
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100% is way too much. 35% for idle and 50-55 for gaming should be right.
 

nafets

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As usual, those burning digital VRMs rear their ugly noses up again. Same thing with many reference HD4870s and aftermarket cooling.

The GPU core loves aftermarket cooling, as it's extremely effective and much quieter than stock cooling solutions. But then you have to deal with properly cooling down the VRMs.

With such a market penetration that the HD4870 has (and soon possibly the HD4890), I'd love to see just one company step up and provide a proper aftermarket heatsink for that whole VRM area, included with their aftermarket GPU heatsink.

This mish-mash of useless overly small heatsinks that the end user is expected to somehow "stick" to these miniscule VRM chips is a joke. Just make me a big chunk of aluminum with some push pins on each end so I can firmly clamp it over the VRM area with proper and sufficient force.

Here's to hoping. :)
 
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