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E6400 vs E6420 for a big O.C. - Page 3

post #21 of 37
Quote:
Originally Posted by bluedevil View Post
Bluedevil - good info on the link, but what I was stating was that I wanted to see proof cache was more important than clock speed.

Now, I'll admit with identical clock speeds, you will see a slight increase in performance with the larger cache. But I would still go for the chip that will give me the highest clock speed.

Even the recent E6400 steppings still OC well, I had to RMA a E6400 30B that was in my folding rig and got a 49F as a replacement. It tops out around 3.7ghz, but runs 3.2ghz @ 1.36vcore 29C idle, 41C load with a Zalman 7000CU in my HTPC with 0 air flow.
    
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post #22 of 37
I think I'll steer this discussion back to what probably is the most important thing; the luck of the draw!
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post #23 of 37
Quote:
Originally Posted by weltall View Post
You will see that the oldest model 6300 has both Tdiode enabled and 22W Extended Halt Power. the newest 6300 model has only 12W Extended Halt Power and 6320 lacks both Tdiode and Extended Halt Power.
12w C1E is better, it is stating that it requires less power. Tdiode is irrelevant and wasn't functioning correctly on the E6x00 series anyway. Intel actually made a press release about this some time ago, which is likely why it was dropped from the E6x20 lineup.

I wasn't aware the E6x20 lineup didn't utilize C1E...... that's very interesting.
    
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post #24 of 37
I would say that the double cache would be worth not being able to OC as high. I would imagine there's only perhaps a 200 MHz difference in OCing potential, and the cache would at least make up for that in performance numbers.
    
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post #25 of 37
I will remain on what I said and I will just add that I know that there are 3 different stepping 6420 and that one of them which is L651B325 is a very good OCer but compared to a bad stepping 6400. So yes depending the stepping each CPU is better or worse OCer. Extra cache seems to be more important than OCing potential but as already mentioned ot maybe not help much since 2MB it enough for today's needs. Just rememeber that extra Cache produces more heat too but thats not something you should bother much since it worths it.
    
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post #26 of 37
zzz, we've got stickies in this thread with actual numbers and such. I've just checked them, and according to them, www.overclock.net members are getting higher overclocks on the E6420s than the E6400s....
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post #27 of 37
Quote:
Originally Posted by CMH View Post
zzz, we've got stickies in this thread with actual numbers and such. I've just checked them, and according to them, www.overclock.net members are getting higher overclocks on the E6420s than the E6400s....


I just ran through the C2D overclocks by CPU, Week, OC, and Voltage thread

Average E6420 = 3.327ghz

Average E6400 = 3.431ghz
    
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post #28 of 37
Well, your average took everyone's speeds, and averaged that.

However, you'd see that most scores on the E6400 side were closer to 3ghz, while the scores on the E6420 side stayed closer to the 3.5ghz mark.

I'd say it still boils down to the luck of the draw.
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post #29 of 37
Quote:
Originally Posted by TaiDinh View Post
E6400 vs. E6420 - E6420 wins IMO.

Reason: More cache, better steppings since it's released months after the E6400, which results in cooler temps in most case.

I've experienced the E6320 overclock and it's superb. 2.9Ghz - 1.35vcore - 31C ambient - 29C idle - 50Cload.

My E6400 at 2.9Ghz - 1.22vcore - 29C ambient - 41C idle - 56C~57C load - LESS cache! ._.

The temps above are from stock HSF with line method AS5 applied.
You can't idle below ambient with any conventional cooling, let alone stock. >.>
post #30 of 37
This is with 1.5vcore....


I guess I got lucky.....
    
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