enough nonsense jaredpace.
prime stability at 4.5 ghz is NOT going to happen unless you are using active heat rejection, like chilled water or phase change
the voltage required for 4.5 ghz prime stability is way beyond what any air cooling or water cooling system can handle.
you will need around 1.55-1.6v depending on the chip, and granted you will kill your chip within 12 months.
until we get a new stepping with improved power leakage perhaps (like what G0 did to B2 and B3), the limit for prime stability with 45nm will be 4.2 ghz, and thats assuming you have good cooling and an amazing motherboard with good power delivery and voltage regulation.
prime stability at 4.5 ghz is NOT going to happen unless you are using active heat rejection, like chilled water or phase change
the voltage required for 4.5 ghz prime stability is way beyond what any air cooling or water cooling system can handle.
you will need around 1.55-1.6v depending on the chip, and granted you will kill your chip within 12 months.
until we get a new stepping with improved power leakage perhaps (like what G0 did to B2 and B3), the limit for prime stability with 45nm will be 4.2 ghz, and thats assuming you have good cooling and an amazing motherboard with good power delivery and voltage regulation.
dont bother wasting your time. set your mind on 450 FSB, which should be achievable with a decent mobo, and get either an E8400 or E8500.
E8400 will run at 4050 mhz, which should be prime stable with ~1.35v under load after vdroop
E8500 will run at 4275 mhz, which should be prime stable with ~1.45v under load after vdroop, and you better pray to god that your air is magic
these are approximations of course. personally, I would go with the E8400 and run cooler and more stable, but only after making sure that your motherboard can do 450 fsb without breaking its back, otherwise you will be sorely disappointed.
E8400 will run at 4050 mhz, which should be prime stable with ~1.35v under load after vdroop
E8500 will run at 4275 mhz, which should be prime stable with ~1.45v under load after vdroop, and you better pray to god that your air is magic
these are approximations of course. personally, I would go with the E8400 and run cooler and more stable, but only after making sure that your motherboard can do 450 fsb without breaking its back, otherwise you will be sorely disappointed.
bryanW1995
Lifer
- May 22, 2007
- 11,144
- 32
- 91
bryanW1995
Lifer
- May 22, 2007
- 11,144
- 32
- 91
I'm not the most internet-savvy dude around, but does anyone else think that xvys was being facetious?
Are there any boards in the pipeline that can take advantage of these higher speeds, without running into bottlenecks?
Or am I running into the limitations of windows?
Heres my setups.
x2 3800 oc'ed to 2.76 on asrock939dualsata2 3 gb ddr, xp-sp2
and
E8400 oc'ed to 4ghz on a GA-P35, 4 gb ddr2, xp-sp2
super pi 1mb is x2= 22 sec , E8400= 17 sec
DVDshrink3.2 full disk of matrix at 48.6% compression.
X2=total time is 9min 12secs
E8400=total time= 8min 51 secs.
photoshop9
render a 1.56gb 24 bit bitmap image 17653x23713 res
x2-10.16secs
E8400-9.29secs
load windows to desktop (from pushing the button)
x2= 12seconds
E8400= 28 seconds (mainly because of bios screen)
Both systems are using the same power supplies, same graphics card(8800gtx), same sound cards(audigy x gamer), same hard drives.
both systems play games almost identical. Crysis and COD4 play exactly the same.
both systems are set exactly alike, same number of services running(21).
I have noticed a big differance in the cpu usage of the 2 chips. For example. During the shrink of matrix. The E8400 would go to 95-100% on one core, 75-90% on the other. The x2- would use 65-75% on one core and 50-75% on the other.
During super pi 1 mb- the E8400 would use 56% of one core 0 on the other. The x2 would use 51% and 0 on the other.
This is my first intel build since my first computer, and that was a p133.
I am kind of use to the tweaking and settings on AMD systems, so I may be doing something wrong with the Intel setup.
Any suggestions our hints would be greatly appreciated.
I don't really use any benchmarking programs anymore because, well, their useless. The numbers haven't coincided with the real world usage.
Or am I running into the limitations of windows?
Heres my setups.
x2 3800 oc'ed to 2.76 on asrock939dualsata2 3 gb ddr, xp-sp2
and
E8400 oc'ed to 4ghz on a GA-P35, 4 gb ddr2, xp-sp2
super pi 1mb is x2= 22 sec , E8400= 17 sec
DVDshrink3.2 full disk of matrix at 48.6% compression.
X2=total time is 9min 12secs
E8400=total time= 8min 51 secs.
photoshop9
render a 1.56gb 24 bit bitmap image 17653x23713 res
x2-10.16secs
E8400-9.29secs
load windows to desktop (from pushing the button)
x2= 12seconds
E8400= 28 seconds (mainly because of bios screen)
Both systems are using the same power supplies, same graphics card(8800gtx), same sound cards(audigy x gamer), same hard drives.
both systems play games almost identical. Crysis and COD4 play exactly the same.
both systems are set exactly alike, same number of services running(21).
I have noticed a big differance in the cpu usage of the 2 chips. For example. During the shrink of matrix. The E8400 would go to 95-100% on one core, 75-90% on the other. The x2- would use 65-75% on one core and 50-75% on the other.
During super pi 1 mb- the E8400 would use 56% of one core 0 on the other. The x2 would use 51% and 0 on the other.
This is my first intel build since my first computer, and that was a p133.
I am kind of use to the tweaking and settings on AMD systems, so I may be doing something wrong with the Intel setup.
Any suggestions our hints would be greatly appreciated.
I don't really use any benchmarking programs anymore because, well, their useless. The numbers haven't coincided with the real world usage.
Originally posted by: bryanW1995
get the quad, it's much better for DC.
I know it would be but I was also thinking about other things, like true 'multi-threaded' games like Alan Wake and such.
The E8400 is definitely tempting but....
I'm still in :heart: with the Q9450.
valon wrote:
Well, if you've got your E8400 to 4.0Ghz stable, your well on your way! Rather than maximum overclocks, I try to find the sweetspot with the highest FSB where the cpu voltage is near the recommended maximum (1.365v), with the other voltages at their lowest level possible while maintaining system stability. So the only tips I could give you is with regards to Intel is the Vdrop. If you set cpu at 1.3875v, only about 1.34v will show up. Intel designs Vdrop this into their mb's to protect your system from voltage spiking. So I try to optimize my systems to reach maximum voltage after Vdrop. Of course, while still making sure the system is stable and not overheating. So you could set the bios cpu voltage at 1.425v and after Vdrop you're at 1.375v. The voltage will drop even further under load. I believe the recommended maximum core temp. is 64C, and they will automatically throttle down as you near 100C.
Well, if you've got your E8400 to 4.0Ghz stable, your well on your way! Rather than maximum overclocks, I try to find the sweetspot with the highest FSB where the cpu voltage is near the recommended maximum (1.365v), with the other voltages at their lowest level possible while maintaining system stability. So the only tips I could give you is with regards to Intel is the Vdrop. If you set cpu at 1.3875v, only about 1.34v will show up. Intel designs Vdrop this into their mb's to protect your system from voltage spiking. So I try to optimize my systems to reach maximum voltage after Vdrop. Of course, while still making sure the system is stable and not overheating. So you could set the bios cpu voltage at 1.425v and after Vdrop you're at 1.375v. The voltage will drop even further under load. I believe the recommended maximum core temp. is 64C, and they will automatically throttle down as you near 100C.
Originally posted by: DSF
Originally posted by: Xvys
I am using the ThermalRight Ultra 120 Extreme cpu heatsink. It has only been installed for one hour or so, butI have tried Prime Torture Test and Orthos for a short period to test stability. I will put it through it's paces this evening to test it's ultimate stability, after I up the FSB at bit more
Not sure how to link pictures. Is this some kind of cost saving measure by AnandTech not allowing uploaded pics? I guess they can save 10 cents in bandwidth, but at what cost to readership??
An hour of Prime isn't enough to say anything for sure, but good luck! If you can get it to be stable overnight, that's awesome.
an hour of prime can play 30 hours straight games. that is stable. i don't understand why people need to torture their comp unrealistically just to come to a slower speed. now if you run prime for some professional team where you need it to be stable for 300 hours for the prime championship, go for it. if you play games and do anything else. what a waste.
Thanks xvys,
The intel seems to be more forgiving as far as the settings go than what the amd's are. I ran prime last night for about 6 hours with no issue's.When I get home later I am going to try and oc the ram more and see if that improves the performance more.
The intel seems to be more forgiving as far as the settings go than what the amd's are. I ran prime last night for about 6 hours with no issue's.When I get home later I am going to try and oc the ram more and see if that improves the performance more.
ghost recon88
Diamond Member
- Oct 2, 2005
- 6,196
- 1
- 81
Wrong. An hour of Prime95 means jack squat. Trust me, you don't want to be in the middle of a CoD4 multiplayer game, then have your computer restart
In order to truly say your CPU is "stable", you have to pass at least 8+ hours of ether Prime95, or Orthos.
Krakn3Dfx
Platinum Member
- Sep 29, 2000
- 2,969
- 1
- 81
You sighed in a post...lol.
Anyway, I popped one of these in my PC last night to replace an e4400@3Ghz. Set it to 3.6GHz immediately, loaded up Crysis, it makes a MASSIVE difference over the e4400, especially in the snow areas, where my PC would really chug when your goggles were frosting over. Thinking Crysis must really like the L2 cache and extra speed boost, I was able to move my texture quality up to high and still it ran very playable.
Nice chip, plan to play around with OC'ing it some more this weekend, see if I can hit 4GHz. When I set it to 9x445 last night, it wouldn't boot, could be a memory issue tho, if I have to tap the voltage a little, not a big deal, but I don't like the thought of doing it too much, seen a few guys on ocforums at 1.5v, which, wow.
Was going to go with a q6600, but I think will hold me until the 45nm quads are out and between $200-$300.
ghost recon88
Diamond Member
- Oct 2, 2005
- 6,196
- 1
- 81
Originally posted by: Krakn3Dfx
Originally posted by: ghost recon88
Like...myself
I think I'll have to stop myself at 1.45v, 1.5 seems like it would put quite a bit of stress on the processor.
I'm hoping to get 4.0 at the lowest voltage, any idea what that is? i'm hoping ~1.3
ghost recon88
Diamond Member
- Oct 2, 2005
- 6,196
- 1
- 81
Sweet. I can't wait to get this rig going. My E8400 should be here Friday, hopefully sooner. Still need to borrow a C2D from the work computer sitting next to me to flash my DS3L though.
VirtualLarry
No Lifer
- Aug 25, 2001
- 56,587
- 10,225
- 126
That's very interesting... and very strange. I don't know why the E8400 isn't faster. Were you shrinking with the DVD as the source, or a HD rip as the source? You're obviously bottlenecked somewhere besides the CPU, because the E8400 @ 4.0Ghz should absolutely smoke the X2 3800 @ 2.76.
Try running Seventeenorbust (.com) on your rigs, and tell use the Cems/sec score. The E8400 should be more than double that of the X2.
(you'll need to set up the service install, to utilize both cores.)
Btw, when I use DVD shrink, both of my cores go to nearly 100%, this with a 3.2Ghz E2140.
ghost recon88
Diamond Member
- Oct 2, 2005
- 6,196
- 1
- 81
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