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[FUD]XFX Radeon DD R9 290X 1000M 4GB reviewed - Page 6

post #51 of 70
1.25V Vcore? Holy mother of Christ.
   
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post #52 of 70
Thread Starter 
Quote:
Originally Posted by MaCk-AtTaCk View Post

did pretty well considering the size of the heasink vs saphire/gigabyte... to bad it didnt come with a backplate.

With a backplate it would have been close to perfect
post #53 of 70
Whoever at XFX engineering dept who thought it was a good idea to waste money on a light up logo facing the bottom of the case instead of having a proper VRM sink should be smacked. Seriously, the VRM/mem heatsink is just a plate which is partially plastic.

97-106°C VRM temp is ridiculous if you're just running Unigine

Aesthetic, I'd return it. Worst case scenario: buy a reference card and get an aftermarket cooler with VRM sinks
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post #54 of 70
If CFX drivers had better anti frame latency and screen tearing like nvidia cards this might bean ice card for crossfire.
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post #55 of 70
What?^

I didint know that screen tearing is a feature
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post #56 of 70
Quote:
Originally Posted by cdoublejj View Post

If CFX drivers had better anti frame latency and screen tearing like nvidia cards this might bean ice card for crossfire.

If it's hitting 100+ C VRMs without a second card feeding it hot air, I think the plastic is going to melt in crossfire.
post #57 of 70
Quote:
Originally Posted by Exilon View Post

If it's hitting 100+ C VRMs without a second card feeding it hot air, I think the plastic is going to melt in crossfire.

oh.... then never mind.
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post #58 of 70
Why does XFX engineers not believe in VRM cooling?
post #59 of 70
Vrms are fin up to 105c.

So I don't see a problem with the card.
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post #60 of 70
peak available amperage is going to drop to below 300W levels (6 phase @ 1.25V is ~40A , with zero leeway for conduction losses, switching losses , dead time losses, and other issues) once you pass about 110°C ,if you don't believe me you can check the IR6811 / IR6894 datasheets


Case temp = T_case of Directfet mosfet
http://ec.irf.com/v6/en/US/adirect/ir?cmd=catProductDetailFrame&productID=IRF6811STRPBF
http://ec.irf.com/v6/en/US/adirect/ir?cmd=catProductDetailFrame&productID=IRF6894MTRPBF

Driven by IR3567B (6+2)


For people to read/watch up on VRM: Warning: Spoiler! (Click to show)
edit: r9 290X can draw more than 380W... http://www.tomshardware.com/reviews/radeon-r9-290x-thermal-paste-efficiency,3678-2.html

edit 2: reminds me of Vapor-X with the "fake VRM heatsink"
http://www.xtremesystems.org/forums/showthread.php?286705-How-To-Curb-excessive-VRM-temps-under-full-GPU-load-on-Sapphire-Vapor-X-7950s
http://www.techpowerup.com/forums/threads/how-to-curb-excessive-vrm-temps-under-full-gpu-load-on-sapphire-vapor-x-7950s.186666/
Edited by AlphaC - 1/13/14 at 6:41pm
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