p42.26b --> 3ghz!!

[Tummy]

hi all. just got my new p42.26b cpu to run at 3.0ghz! CPU is a -001 SL67Y, can't remember the other details off hand. I'm using a koolance case and the Gigabyte 8IGX motherboard. Crappy ram right now but at 177fsb, can do 1.5 multiplier for 266 speed on the ram. Will change that and up the ram speed later.

CPU is completely stable in windows but at anything over 174fsb, I can't soft reboot. 174 = 2960 and 1.65V ran simultaneous prime95 and seti@home all night. load temps sitting around 43-45, idle around 41, the koolance monitor runs from about 34-41... i guess it is doing a really good job of taking heat away from the cpu. Room temp about 30 in my place!

I would love to be able to do 174*2.5 = 435 for my ram. I've got some samsung pc2700 on the way, should I have gotten something different?

 

[Miata13]

I have the same processor mounted on an Abit IT7. I run PC2700 and have tested it up to 176mhz FSB with NO PROBLEMS.

 

[NoVo]

CPU is completely stable in windows but at anything over 174fsb

I have the same processor. Would you mind sharing the mainboard type and are you using an Intel stock HS and fan?

Thanks

 

[Rythan]

He's using the Koolance case, which means he's got the Koolance watercooled CPU cooler (like I do). The Koolance is great... I replaced the stock fans in it with Papst's, and now it's very quiet, and the coolant still never exceeds about 100F even under full load.

 

[BuddyAtBzboyz]

I'm impressed but not overly. I have heard of people getting 3ghz on the 1.6A with water cooling. That is a 187fsb which costs alot less then the 2.26b and is faster with the higher fsb. Not knocking you or anythign though my last overclock sucked

 

[Mikki]

Tummy, your ram very well may be holding you back. I'd suggest trying some better stuff, but the way prices are right now...:Q

Nice overclock, nice round number!

 

[SolrFlare24]

Buddy, yeah that is true but the 2.26s are more reliably hitting 2.8ghz and higher numbers(only heard of a few very rare chips that can't at least make 2.8 with a 2.26). Meanwhile, beyond 2.4-2.5ghz its pretty much luck of the draw with a 1.6. But yeah it can be done.

The big thing about the 2.26 though is that if your processor can hit 3ghz, you can do it with air cooling no problem as long as you have a good hsf. Whereas you need something better to take a 1.6a there(and at those high a voltages you're processor has a short lifespan). But heck, either works...the only real dud of a northwood I've seen is the 2.0b otherwise they all pretty much overclock real nicely.

 

[NoVo]

The big thing about the 2.26 though is that if your processor can hit 3ghz, you can do it with air cooling no problem as long as you have a good hsf.

I agree with that. I'm running my 2.26b at 150FSB with stock HSF and default voltage of 1.56. Also, the 1.6a's can not take full advantage of 533 FSB Mainboard.

The 2.26b is about only $80.00 - $100.00 more than the 1.6a. Not a bad deal.

Does anyone have experience with the Swiftech MCX4000 with TMD fan? I am torn between the MCX4000 and the Alpha 8942.

Thanks.

 

[Duvie]

I agree with that. I'm running my 2.26b at 150FSB with stock HSF and default voltage of 1.56. Also, the 1.6a's can not take full advantage of 533 FSB Mainboard.

How's that??? Explain....

 

[NoVo]

How's that??? Explain....

I was simply refering to the 2.26b's 533 system bus vs the 1.6a 400 MHZ system bus. Sorry, I did not think that needed to be explained.

 

[Wingznut]

Originally posted by: NoVo

How's that??? Explain....

I was simply refering to the 2.26b's 533 system bus vs the 1.6a 400 MHZ system bus. Sorry, I did not think that needed to be explained.

What you are saying is true at default cpu speeds. But once you start overclocking, all of what you said is thrown out the window... If you are running a 1.6a @ 150fsb, and a 2.26 @ 150fsb, they are both running on the same speed fsb. The "system" bus is the same as the FSB.

They get the numbers "400" and "533" because it's a Quad-pumped FSB (4x100mhz and 4x133mhz)

 

[BuddyAtBzboyz]

I agree with that. I'm running my 2.26b at 150FSB with stock HSF and default voltage of 1.56. Also, the 1.6a's can not take full advantage of 533 FSB Mainboard.

I am also very confused by this statement. We are talking specifically about overclocking here. Besides if you wanna make your 1.6A use a fsb of 133 at default there is a pin mod you can do.

 

[Tummy]

Hi guys... yeah, I know some people get to 3ghz with a 1.6 but I think that's pretty rare. The 2.26's seemt to be doing quite well and for me, I've never had really great success in oc'ing because my place is so hot (like I said, 30 ambient room temp). When I use my koolance case it keeps it nice and cool but air cooling for me always pushed the processors I've had into like.. 60+ which is way too much in my opinion. Anyway I'm really happy with this chip. I picked up some Samsung pc2700 and tried to do 174fsb 1:1 but it wouldn't work... but I found out that even at 166 the ram wouldn't work, so I think I got a bum stick... waiting on a replacement.

 

[paralazarguer]

Besides if you wanna make your 1.6A use a fsb of 133 at default there is a pin mod you can do.

Pin mod? What are you talking about? I'm running at P4 1.6a on an ASUS P4S533. I just run the fsb at 133 (533) at the default voltage and it runs at 2.13ghz. There's no need for any mod of any kind.

 

[BuddyAtBzboyz]

Pin mod? What are you talking about? I'm running at P4 1.6a on an ASUS P4S533. I just run the fsb at 133 (533) at the default voltage and it runs at 2.13ghz. There's no need for any mod of any kind.

Its good for people who can't overclock with their boards mostly. Not that many people here would have that problem!

 

[Tummy]

Got my new stick... sitting pretty at 177fsb = 3010 at 1:1 ratio but only slow memory timings and +.3vdimm. It's stable, but can't up the memory timings at all at this speed to maintain stability. The other stupid thing is that I still can't soft reboot... but it doesn't seem like it's limited to just anything > 174fsb. I hope GA can fix this problem, although i don't know what my chances are.

Perhaps i will switch back to the abit bg7 when I get my replacement... unless somebody knows how to fix the ga reboot issue?

 

[BuddyAtBzboyz]

Congradulations on the better stick. Too bad you can't adjust the multiplyer on a p4 or you could probably reach 200!

 

[Outrager]

I'm thinking of getting a 2.26B with a Gigabyte GA-8IEXP. Do you guys think I can get at least a decent O/C with a HSF (not some fancy water cooling)?

 

[Mikki]

Yes, I would try the retail hsf with some AS3 instead of the heat pad first, and if you're not happy with it, then look into an upgraded hsf. Watercooling a P4 is overkill....

 

[BuddyAtBzboyz]

"watercooling a p4 is overkill"

Well I suppose so if you sole intention is overclocking and not silence and/or lower temps to prolong the life of the system.

 

[Mikki]

Originally posted by: BuddyAtBzboyz
"watercooling a p4 is overkill"

Well I suppose so if you sole intention is overclocking and not silence and/or lower temps to prolong the life of the system.

$$$ for watercooling vs. $20 for some quiet fans. Common sense. My 1.6a @ 2.5 1.61v 33c with stock hsf and the fans that came with my case. Besides, heat isn't a really a factor for the P4 (unless something is wrong), voltage is. If you want to prolong the life of your chip, just overclock it as far as you can with default voltage and leave it there. Like I said, watercooling a P4 is overkill. Unless you're a tinkerer like me and just want to play with it, that I can understand...

 

[Duvie]

Tummy,

2 things on the soft reboot....

1) try the wire mod trick...it will set the voltage to 1.7v at default so if you want to run 1.65 either you need your mobo to undervolt or have options for minus voltage (my epox does)...

2)The ram is not stable....I had exact thing when trying to run my corsair at 443mhz ddr....Raise voltage to 2.8v if you have to...if same problems then back down on memory with ratio or fsb like I did and problem went away...I also employ the wire trick and have had no issues with reboots at levels 5-7 fsb above that point I tested the memory....The memory was just added to a completely stable 4-5 weeks without incident system, so culprit was easily identified...