Added a Corsair H50.. wanna bump up the speed... question

[mastamoon]

Hi All,

I just got a H50 installed on my PC and want to bump up the speed of my i7 920 C0/C1. Motherboard is a Asus P6T Deluxe.

My question is.. What way to 3.8ghz is better?

CPU Ratio 21 x BCLK Frequency 181

or

CPU Ratio 20 x BCLK Frequency 190

Seems like there are many ways to get to 3.8ghz...

3800 / 21 = 181
3800 / 20 = 190
3800 / 19 = 200

So which is best.. Low CPU ratio and High BCLK or High CPU ratio and Low BCLK?

Thanks!

 

[myocardia]

Assuming one is as stable as the other, higher BCLK will perform slightly better. You most likely won't be able to tell the difference between the two without benchmarking, though.

 

[cubeless]

can u report on how hot @ what speed and voltage u get? i'm building a 920 box, and got a thermalright zen for it, but the temps are way high @ 3.8 and 1.35ish v... i've reseated, etc, a couple times to no avail... the clip is just a pushpin thng...

i've used a zen on a couple previous c2d and amd builds with excellent results... not sure exactly what the deal is here... ordered a sunbeam core contact, but may pick up one of these if that's not sufficient... reviews on the h50 seem pretty good...

 

[yh125d]

Originally posted by: cubeless
can u report on how hot @ what speed and voltage u get? i'm building a 920 box, and got a thermalright zen for it, but the temps are way high @ 3.8 and 1.35ish v... i've reseated, etc, a couple times to no avail... the clip is just a pushpin thng...

i've used a zen on a couple previous c2d and amd builds with excellent results... not sure exactly what the deal is here... ordered a sunbeam core contact, but may pick up one of these if that's not sufficient... reviews on the h50 seem pretty good...

It's because you're running an i7 at 1.35vcore for craps sake, how cool do you expect it to be??

 

[cubeless]

Originally posted by: yh125d

Originally posted by: cubeless
can u report on how hot @ what speed and voltage u get? i'm building a 920 box, and got a thermalright zen for it, but the temps are way high @ 3.8 and 1.35ish v... i've reseated, etc, a couple times to no avail... the clip is just a pushpin thng...

i've used a zen on a couple previous c2d and amd builds with excellent results... not sure exactly what the deal is here... ordered a sunbeam core contact, but may pick up one of these if that's not sufficient... reviews on the h50 seem pretty good...

It's because you're running an i7 at 1.35vcore for craps sake, how cool do you expect it to be??

ummm... mid 60's with a good aircooler...

 

[yh125d]

Not gonna happen at that OC/vcore man. You seriously underestimate how hot those run.

 

[aigomorla]

Originally posted by: yh125d
Not gonna happen at that OC/vcore man. You seriously underestimate how hot those run.

Not possible with his cooler but its possible...

but expensive... U'll need a mid tier H2O setup.

Then you could probably do 4ghz @ lower to mid 60's, 4+ near the 70's.. thats assuming your cpu scales the way im thinking it would scale.

 

[Beanie46]

Originally posted by: aigomorla

Originally posted by: yh125d
Not gonna happen at that OC/vcore man. You seriously underestimate how hot those run.

Not possible with his cooler but its possible...

but expensive... U'll need a mid tier H2O setup.

Then you could probably do 4ghz @ lower to mid 60's, 4+ near the 70's.. thats assuming your cpu scales the way im thinking it would scale.

So true.....I've got a 920 on a RII Gene, ran a 1hr. run of Linpack (via OCCT 3.1) on my cpu at 4.1GHz (21 x 195) @ 1.35V, running an admittedly low-mid tier H2O setup (Thermochill 120.3 rad, Watercool HK 3.0 LT block, DDC2 pump w/XSPC top)....my hottest core got to like 62C, room temps in mid-upper 70'sF. (All 4 cores testing w/HT on.)

Core 1 on 1 hr. of Linpack.

VCore during run above.


I seriously doubt, as Aigo does too, that any air cooling or the Corsair H50, would achieve such temps during that single hour of running.

 

[MarcVenice]

I've been testing a few coolers on and off, also tried the H50. H50 so far gives the best results, like around the 70's, with 3,8GHz, on 1,3vcore, if I'm not mistaken. TRUE will easily get to 80c. Mugen 2 performs roughly the same. This is all with a d0 btw. Either way, I wouldn't worry about the higher bclk, you're just putting more strain on your motherboard/cpu, for nor extra benefits really.

 

[mastamoon]

Right now I'm running at 3.8Ghz via 181 bclk x 21 ratio... If CPU-Z is correct this is at a 1.416V core voltage. I havent touched the voltages yet, only have changed those 2 numbers above (bclk and ratio). My idle temps with the H50 are 39, 39, 41 and 36.. When doing light work they are in the low 40s. Under load via Prime95, temps were 61, 61, 63, 59 max. Pretty good!

I'm guessing that if I back down the voltage a little bit (1.35ish) I can save some heat there also.

Running with those settings above, my memory is only running at 1447.4, so I guess I should play with the numbers to get my 1600mhz ram close to that number.

 

[mastamoon]

Running good at 200 x 19 = 3800mhz... Lowered the voltage to 1.35... idle between 38 (core4) and 44 (core 3), core 1 and 2 are in between.

Wish there was a clear answer to which is actually quicker... 200 x 19 or 181 x 21.. I guess I could benchmark each... but being my work PC, I gotta be quick with these tweaks! lol

 

[Shmee]

well, my C0 only reaches 74 C on linpack with my TRUE @ 4 GHz and 1.475 Vcore. HT is off though. See my OC thread.

 

[cubeless]

sooo... got to 191*20 with 1.3v... running turbo, so it ramps to 191*21 when busy... tops out @ 76c running linpack for 4 hours... not too bad...

the box is for a kid to game with, so i figure it'll not be getting banged like linpack... and when i do a tuneup down the road i'll see if maybe a h50 makes sense...

 

[bloodugly]

I just read through the thread quickly, but I'd recommend trying your options and benchmarking, for both performance and to see which ends up being most stable. If this is a work PC, I definitely advise some testing to make sure it's rock solid at whatever settings you decide on. To lose something vital because you didn't want to go through some minor trouble would end up making you want to kick yourself