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Old 02-10-2010, 20:18   #41
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) Trebuie sa citeasca un review sa-si dea seama care sunt cu pale albe =)))
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Old 05-10-2010, 09:03   #42
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Pentru un 8800 GT ce ar merge bun pentru racire?
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Old 05-10-2010, 12:18   #43
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Arunca un ochi aici.

Mie imi place cum se comporta si cum arata Zerotherm GX815.
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Old 05-10-2010, 19:03   #44
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AC L2 PRO e OK
am avut pe mana un 8800GT cu asa ceva si se comporta OK (ai destule rezerva in el cat sa-l controlezi si spre silentiozitate,si spre performanta termica mai buna)
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Old 20-10-2010, 01:03   #45
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"THE VRM PROBLEM"

Metodologia in cazul coolerelor vga e foarte greu de pus la punct pentru ca acele conditii egale necesare unei comparatii coarecte reprezinta o utopie.

Problemele la racirea vrm-ului fac aceasta situatie si mai complicata.

Mai jos va prezint doua astfel de probleme, care puteau fi evitate partial de producator prin simpla folosire a unor paduri termice mai groase.

Intotdeauna dupa montarea heatsink-ului de vrm trebuie sa verificati contactul, lucru care se face cel mai bine prin demontarea lui si analizarea urmei. Racirea vrm-ului este foarte importanta (mai ales in overvolting) pentru ca in marea majoritate a cazurilor vrm-ul cedeaza, si nu gpu-ul.

Putem observa in pozele de mai jos un contact imperfect (gtx 480), sau chiar deloc pentru multe cipuri (radeon 5870).







Dupa cum am spus, situatia se poate remedia prin folosirea unui pad mai gros, vor face contact toate cipurile/tranzistorii, dar transferul termic va fi mai prost (pentru cipurile care au facut contact inainte)

In cazul vrm-ului lui 5870 se pot indeparta saibele de protectie si padul termic, astfel cipurile vor face contact direct cu metalul (bineinteles trebuie aplicata pasta termica), dar mare atentie pentru ca siliciul este foarte fragil si daca se strang prea tare suruburile se poate distruge vrm-ul.

Eum am incercat sa imbunatatesc transferul punand pasta termica, dar rezultatele nu au fost foarte bune (oricum nu putem avea asteptari prea mari de la un heatsink de vrm de mici dimensiuni chiar daca contactul ar fi perfect, vorbesc de radiatorul de vrm al lui MK-13, care este o versiune imbunatatita fata de cea initiala).

In primul screen am folosit voltaj default dar se poate observa diferenta dintre cele 4 faze, in ceea ce priveste temperatura. In screenul doi am crescut voltajul la 1.2v si se poate observa ca in ~30 de secunde temperatura a depasit 105c. De 1250mv (pentru a creste loadul pentru gpu) nici nu poate fi vorba.

Am folosit un ventilator de 1700rpm/140mm si un ambient de 26c. La o turatie mai mica situatia va fi mult mai proasta pentru vrm.





In cazul radeonului vedem ca ori cipurile volterra nu sunt la acelasi nivel pe pcb, ori heatsink-ul nu este drept. Cipul care face cel mai bine contact are temperatura cea mai mica, urmat de al patrulea (care face doar putin contact cu padul). Cele doua din mijloc fac contact doar prin intermediul pastei termice aplicate de mine. Foarte utila monitorizarea temperaturii pe fiecare faza la vrm-ul volterra detinut de radeon.

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Old 23-10-2010, 12:11   #46
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Racirea imbunatatita de mai sus de abia face fata pe vrm-ul lui 5870. Distructiv Cooling imi trimite astea pentru Accelero Xtreme Plus. Fa teste de coolere vga.

Probabil articolul va avea o pagina cel mult in care va scrie cam asa:

Accelero Xtreme Plus - nu exista rezultate pentru ca risc sa deteriorez placa video cu heatsink-ul vostru

MK-13 - nu faceti overclocking si nici intr-un caz overvolting ca zboara mosfetii in ochi

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Old 23-10-2010, 12:18   #47
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Aaaaaaaaaaaaaaahahahahahahahahahahhahahahahahahaha haha =))
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Old 23-10-2010, 16:08   #48
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Old 24-10-2010, 13:37   #49
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Al 3-lea e Shamanu???
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Old 24-10-2010, 14:00   #50
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PC-ul meu

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E mk-13
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Old 24-10-2010, 14:56   #51
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Shamanul cred ca s-a pierdut pe undeva
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Old 24-10-2010, 20:40   #52
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A, nici nu a ajuns inca? Stai flexat, aia de la TR sunt putin autisti =))
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Old 25-10-2010, 21:06   #53
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Coolmax 3000 nu va fi inclus in articol dar coolerul este o "mica opera de arta".
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Old 25-10-2010, 21:21   #54
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Daca avea ventilatoarele pe partea care trebuie era si eficient.
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Old 25-10-2010, 21:25   #55
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Colmaxx 3000 este superb.
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Old 25-10-2010, 23:54   #56
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Mnoh acum nu este el SUPER VGA Cooler, ci pur si simplu se adreseaza unui alt target
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Old 26-10-2010, 15:48   #57
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Finii sunt foarte apropiați, din ce știam eu despre răcire odată asta înseamnă că trebuie să ai presiune de aer serioasă ca să-l faci eficient. Dacă ar merge montat a.î. ventilatoarele să bată "în sus", e rezolvată definitiv problema prafului de pe radiatorul plăcii video, ceea ce mi se pare chiar ok
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Old 26-10-2010, 16:04   #58
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Da, daca lamele sunt foarte apropiate eficienta maxima este atinsa numai la turatii mari.

Alt lucru foarte important il reprezinta forma acestor lamele, pentru a putea beneficia la maxim de airflow. Aici intervine un lucru foarte important in aircooling.

Ca sa dau un exemplu practic, o anumita forma a lamelelor vor face un cooler extreme de bun la airflow foarte mare (bineinteles trebuie ca si alte aspecte sa fie la inaltime, baza prindere...etc), chiar daca nu va avea o suprafata foarte mare de disipare.

De ce True cu a sa arhitectura si forma a lamelelor nu este batut (la xtreme cfm) dupa trei ani de VenomousX sau alte o gramada de coolere?

Aceasta forma este de o importanta capitala si va afecta direct coeficientul de drag.

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In fluid dynamics, the drag coefficient (commonly denoted as Cd, Cx or Cw) is a dimensionless quantity that is used to quantify the drag or resistance of an object in a fluid environment such as air or water. It is used in the drag equation, where a lower drag coefficient indicates the object will have less aerodynamic or hydrodynamic drag. The drag coefficient is always associated with a particular surface area.
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Old 27-10-2010, 00:56   #59
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Efect Coandă?
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Old 27-10-2010, 01:02   #60
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Probabil ca intr-o mica masura se intampla si asa ceva dar "coeficientul de drag" este altceva.
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