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June 15, 2011, 10:48:21 PM |
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in case of non-reference GPU's you need at least three high-performance[in CFM's] fans in both front, rear and side covers of you PC cases. usually 120/140 fans with CFM above 45[really measured/benched, not just "printed on the box"] is more or less enough for one card. and no, 85'C for long-tern usage, lead to not-so-fast, but unavoidable GPU degradation. but thats just personal trade-off between noise/comfort and hardware TTL/reliability. if you value comfort more, fine. if not, try keep temps under 75'C max.
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