stock cooling same for 1.8a and 2.0a northwoods?

[DACracker]

I am downsizing my system to one of the new shuttle xpcs (sb51g) after reading all the good reviews... i want to get a 1.8a or 2.0a and run it at a 533 mhz bus... but i'm afraid the 2.67ghz that the 2.0a goes too will be too much for such a small case... although with all i've heard, the same cooling would be ok for the 1.8a, which would run at 2.4ghz... anyone got any thoughts or advice

 

[o1die]

I would get the retail boxed 1.8a and use arctic silver III on it. You can scrape off the standard black thermal pad with a single edge razor blade, and also use it to apply the paste in a nice thin layer, just barely covering the surface. Instructions are at the arctic silver website. The 1.8a should run at 133 fsb (2400) at or near the stock voltage setting (1.45-1.5 volts). The 2.0a will run at about the same speed, but may run at 133 if you increase the voltage to 1.65 or 1.7, which I consider a little high.

 

[RalfHutter]

The retail cooler for both of these CPUs is the same.

According to this page the 1.8A puts out 49.6W and the 2.0A puts out 53-54W. Both of their cooling requirements should be almost identical.

I wouldn't bet on running the 2.0A at 2.67Ghz. Can you even adjust the Vcore on the Shuttle?

 

[oldfart]

Heatsink for 1.6a - 2.8 are all the same. 3.06 is the first that needs a bigger one.

 

[DACracker]

no, you cant increase the Vcore on the shuttle, which is why after your guys input i'm going to go with the 1.8a. nice o/c almost guaranteed (esp with the new c1 stepping, i hear?) just by bumping the bus to 533, at stock cooling. i do have some extra A/S from my last upgrade, good thought. even if i could get 2.67 out of the 2.0a, i dont think i'd want to in such a small case. i overclock to get a better price/performance ratio, not to max out my parts-i still value reliability. thanks for your input guys..
-david

 

[DACracker]

is this the 1.8a version i'm looking for? good price (considering the free shipping and no tax for me here in CA), but it doesnt say 'a' or Northwood like most other online stores' info sections do...
david

 

[cleverhandle]

Originally posted by: DACracker
is this the 1.8a version i'm looking for? good price (considering the free shipping and no tax for me here in CA), but it doesnt say 'a' or Northwood like most other online stores' info sections do...
david

Yup, 512K cache. That's the one...

 

[Viper96720]

Yup no need for a northwood version if your just upping the fsb to 133.

 

[DACracker]

it is my understanding that the smaller die size means less heat production... nice in such a small case..

 

[Viper96720]

oops meant to say doesn't have to be c stepping version. Yes northwood is lower temp because it runs on less voltage. Think its 1.5v versus 1.75 for the older version.

 

[DACracker]

is there any advantage to trying to find the c stepping? just a better chance of getting a stable oc at stock voltage?

 

[jhites]

Originally posted by: DACracker
is there any advantage to trying to find the c stepping? just a better chance of getting a stable oc at stock voltage?

Not to many of the C1 stepping 1.8A's around. Maybe in another month or two the BO stepping inventories will have run out.

You should get 133Mhz bus with the BO stepping without voltage increase. Even my old (6 months) 1.8A that I am running now will do that.

 

[DACracker]

what in the bloody hell is hyperthreading and is this feature incorporated in the 1.8a, or is it only newer processors?
-david

 

[Viper96720]

I think most new xeons and only the 3.06ghz p4 have hyperthreading. Basically tricking the software to think there's two cpu's even though it's just one. 3.06HT

 

[Egrimm]

Originally posted by: Viper96720
I think most new xeons and only the 3.06ghz p4 have hyperthreading. Basically tricking the software to think there's two cpu's even though it's just one.

Correct.

The 2.4(133Mhz) for the 1.8A is as close to a certain thing as you can get in oc'ing if you get a fairly new 1.8A whereas I wouldn't bet on 2.67 from a 2Ghz unless you get a still rare C1 stepping cpu.

 

[DACracker]

thanks guys.. that helps out a lot... is hyperthreading that big of a deal? fyi, i'm switching from AMD since longer than i can remember, going witht he p4 mostly because i do a lot of media encoding... any thoughts or tips..