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  #1 (permalink)  
Old 10th October, 2004, 07:24 PM
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HTT Speed?

Hey all,

I have an AMD64 system based on a 3000+, with an EPoX 8KDA3J and two sticks of Kingmax PC3500. For a $90 board, I'm very impressed with the 8KDA3J. The only thing that gets me is it doesnt seem to have 1000Mhz support, only 800MHz. I tried overclocking different ways for a while and that seems to be the issue: every time I go above 800MHz, the system becomes instable. Right now I'm happily running at 2.25GHz (225x10) @ 1.6vCore (can overvolt to 1.64 though) and 225MHz RAM w/ 2.5-3-3-10 timings @ 2.7vDIMM. I can go higher on this vcore, but I'd have to loosen the RAM timings and its very stable as it is. However, I'm running my LTD mulitplier at 3 to keep it under 800MHz. Right now its running at 675MHz, well below the stock 800MHz. My question is, how much a performance hit do you get form lowering the HTT speed? I tested in 3DMark and scored 21664, 45points higher than my system running at 220x10FSB with an 880MHz HTT. Is that about right? Thanks!
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Old 10th October, 2004, 07:38 PM
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I did some tests when I was first testing my system for max overclock and basically 3 x or 4x seems to have no effect on 3DMark 2001.
Also max HTT I could achieve was 245 x 4 = 980.
Results at memory timings 2.5-3-3-8 1T
251 x 9 at 3X was 19,682
245 x 9 at 4X was 19,493
230 x 10 at 4X were 19,572 and 1919,582
230 x 10 at 3X was 19,608
240 x 10 at 4X was 19,943
To show advantage of lower memory timings
Results at 2.5-2-2-8 1T
230 x 10 at 4x was 20,052
240 x 10 at 4x was 20,261
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Last edited by Oldjim; 10th October, 2004 at 07:48 PM.
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Old 10th October, 2004, 08:08 PM
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Sweet, thanks Oldjim, that's what I was looking for . I know about the RAM timings, that's why I'm trying to keep them low. It doesnt seem like your 8KDA3J had any trouble going right up to 980 though, did it? Maybe I wasnt supplying enough voltage to the RAM. It turns out HTT does make some difference in gaming though. I did alot of testing and I get 0-3FPS more in Doom 3 at 900MHz than at 675MHz. I'm going to leave it at 900 and see how stable it is. It's too bad we cant bump up the LDT voltage on these boards
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Old 10th October, 2004, 08:27 PM
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I run HTT of 1168MHz al of the time without issue; i.e. 4 x 292MHz.
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Old 10th October, 2004, 08:39 PM
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But you have an 8KDA3+. Would that make the HTT behavior any different from an 8KDA3J?
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Old 10th October, 2004, 08:41 PM
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They are exactly the same product although you have no Sil3114 or optical connector or luxury power pack.
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Old 10th October, 2004, 09:09 PM
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Sweet, thanks alot man
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Old 10th October, 2004, 10:58 PM
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Quote:
Originally Posted by EPoX Tech
I run HTT of 1168MHz al of the time without issue; i.e. 4 x 292MHz.
That's amazing - what cooling are you using. Do you have active cooling on the chipset
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