So confussed about Intel Cpu

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phillyman36

Golden Member
Jun 28, 2004
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Ok on the front page there are several articles. One about the 975 chipset and Pentium D 900 coming out in January(65nm) There is Cedar Mill, Pressler and Conroe. Which one of these Cpus is the new designed cpu thats built around the Pentium M thats suppose to be really good and better performance (i believe they were making the pipelines shorter like AMD does) Please forgive me if i dont have my facts straight. Which is which(i want to know which is the new redesigned cpu(conroe?) and when is it coming out) Please explain as my head is about to explode.

Ps Will the new cpu(from Intel) be able to compete in the performance department with Amds X2
 
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Furen

Golden Member
Oct 21, 2004
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OK, The 65nm Pentium D 955 that's supposed to come out in January is a Pressler core, basically a die-shrink of the current Pentium Ds. That means it still uses the huge 31-stage integer pipeline and probably still generates lots of heat (we cant be sure about this last thing until one actually gets tested). Cedar Mill is just a single-core Pressler, nothing more, nothing less. Conroe, on the other hand, is the chip that is built like the Pentium M. It's somewhat similar to it but the execution core is pretty different (I think), so I woudlnt consider them completely analogous. This should be coming out between Q3-4 (that's my guess).

AMD's is a 3-issue chip while Intel's will be 4-issue. AMD has the advantage of the integrated memory controller while Intel should have a slightly better branch predictor, speculative prefetching and who-knows-what-else. Though Conroe sounds very good on paper, I think it will be very hard to keep execute 4 instructions in paralell because a) you have to get the 4 instructions from the cache/memory and b) You have to find enough instruction level parallelism in code, which could be hard on x86. Performance-wise, I think the new CPU will perform very similarly to AMD's X2 overall but at lower clockspeeds and power consumptions (at least until AMD's 65nm shrink).
 
IntelUser2000

IntelUser2000

Elite Member
Oct 14, 2003
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I think you guys are underestimating Conroe as it seems with good chipset(Asus adapter and 865/875 chipset), Dothans already perform well per clock to A64s, and X2s are just dual core versions.
 
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Chode Messiah

Golden Member
Apr 25, 2005
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conroe seems good on paper, but we have yet to see whether it will just end up being a shrunken pres-hot that is overpriced. I'm waiting for a review from anand and then I'll buy it. Im hoping it turns out to be a great cpu, because if it is like intel says it is, it should overclock like crazy.
 
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Furen

Golden Member
Oct 21, 2004
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Originally posted by: IntelUser2000
I think you guys are underestimating Conroe as it seems with good chipset(Asus adapter and 865/875 chipset), Dothans already perform well per clock to A64s, and X2s are just dual core versions.
Click to expand...

You mean dothans perform about the same as A64s with an overclocked system bus and low latency DDR1 (which Conroe won't get to use under normal circumstances). I said "I think the new CPU will perform very similarly to AMD's X2 overall but at lower clockspeeds and power consumptions (at least until AMD's 65nm shrink)" which means that clock-for-clock Conroe should perform slightly better. The problem is that we dont know how high their clock will be at launch (I've heard around 2.5-2.8GHz but I dont know for sure) while AMD could be well on its way to 3GHz or even higher. Intel didnt really give us much to go on with during this fall's IDF, they just said enough to make people speculate that their chip will perform fantastically. Considering that Yonah will perform quite a bit worse than AMD's X2 (around the same to slightly worse clock-for-clock but Yonah will top out at around 2.3GHz--and that will probably happen during the 2nd half of next year--while AMD should hit 2.6 with the X2s before Yonah even comes out), I'm not sure how much of a performance improvement to expect from Conroe. If you ignore all the marketing BS, you'll figure out that Conroe will basically be a wider A64 without the Integrated mem controller but with a slightly better front end (though I'd like to know a bit more about Conroe's x87 and SIMD performance). Remember that AMD had to integrate the memory controller in order to keep the 3-issue execution core fed all the time.

EDIT: By the way, the Inquirer claims that Merom appears to be scheduled for week 36 (Early-mid September) according to OEM roadmaps. So I would expect the desktop variant to appear a bit earlier or at the same time.
 
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DarkKnight69

Golden Member
Jun 15, 2005
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You mean dothans perform about the same as A64s with an overclocked system bus and low latency DDR1 (which Conroe won't get to use under normal circumstances).
Click to expand...

My Dothan runs a 225 system bus and will still match (usually kicks the pants off) the A64 in gaming and PI. Admittedly, will not do the encoding faster, but performs verynicely clock for clock with the AMD's in these areas (which is why I bought it.

If Intel can add some 'swag' to the chip and put 2 of them together...maybe even a mem controller, they will be competing with the X2 just fine!
 
DrMrLordX

DrMrLordX

Lifer
Apr 27, 2000
22,967
13,065
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DarkKnight, try benching your Dothan in SuperPi at 32M vs an Athlon 64. I'd like to hear the results.

 
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DarkKnight69

Golden Member
Jun 15, 2005
1,688
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Dothan 730 @ 2.7Ghz
Crucial Ballistic PC4000 @225 2.5-2-2-5
P4P800-E deluxe
CT-479


The processor cost me $115 used
and the adaptor 49$ new

Everything else I had!
 
DrMrLordX

DrMrLordX

Lifer
Apr 27, 2000
22,967
13,065
136
26.04 minutes seems pretty damn good. Can anyone beat that with a single-core A64 in here? Granted, it's just Super Pi, but still, it is amusing.

I still don't consider the Dothan to be particularly viable for 99.9% of PC users, especially given the shortage of desktop platforms that support it. Otherwise, it's a nifty chip. Conroe should be interesting . . .
 
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Pabster

Lifer
Apr 15, 2001
16,986
1
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Originally posted by: DarkKnight69
Well, i beat all the A64's here at 8M! Some of them at 300HTT
Click to expand...

You managed to win in one synthetic benchie... now let's compare something else :D

Truthfully, Dothan is a good chip. For SuperPI runs and gaming :p

For everything else it gets trounced.

My Dothan (1.86GHz) churns out some nice SETI work unit times, but it lags far behind in a lot of other areas.
 
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