**Official e8400/e8500 Retail OC Thread

[zlojack]

i agree wit hyou on the temp with intelburntest. it does push up the heat when testing...i will do 5-20 test on it then if it passes that then i will do the normal testing we all use. if it wont pass intelburntest then i no it wont pass the others.

Not true at all.

My E8600 could pass several passes (5-10) of IntelBurnTest but failed Orthos Small FFT.

I had to raise vcore from 1.34 to 1.36 for Prime small fft stability on my E8600.

Funny enough, my E8400 was the opposite. Primed all day and night no problem, but wouldn't pass IBT (this was at 4.2GHz 1.36v)

[jaredpace]

Someone at anand just got in on the $139 Fry's E8400 deal, and it was an E0 stepping!

[whe3ls]

hey guys i got a xeon 3110. i havent gotten to play with it yet. i killed another mobo. owell i have been thinking of replacing my new ds4 anyway. im am told that this xeon should be able to do 4.3 @ 1.36vcore. now i just need a mobo and ram. lol. ill post some screen shot once i get up and rolling

[cincyrob]

Not true at all.

My E8600 could pass several passes (5-10) of IntelBurnTest but failed Orthos Small FFT.

I had to raise vcore from 1.34 to 1.36 for Prime small fft stability on my E8600.

Funny enough, my E8400 was the opposite. Primed all day and night no problem, but wouldn't pass IBT (this was at 4.2GHz 1.36v)

thats just it for me. if it dont pass IBT i know it wont pass orthos. at least it hasnt so far.


question.? is 1.36-1.39v to much for these E8400 co stepping? will the degragation start on it at those volts? i do need this puter/CPU to last a few years. so as much as id like to keep it at 4.0ghz i dont want to fry it up like a sunday egg...lol

[HDCHOPPER]

this is Xtreem forum .. really if you are talking YEARS then run stock or whatever you can get out of it with the stock volts the bios boots with stock

most of us dont care if it frys within months so long as we can run 5.0

[Dee]

It would be nice to have an answer to the question, though. I know nobody can say exactly how long a CPU will last, but it would be good to get at least a couple of years out of it. It seems nobody can say exactly how much voltage is too much, because I see the question being asked constantly and there are never any logical replies.

[HDCHOPPER]

yes eye did reply to cincyrob's question ... leave the volts stock and clock up to what you get in cpu speed with that
(stable of course) thats the only really safe way... intel says you limit yourself to 1.364 but thier thay dont care about the life of your cpu... feel daring then use 1.364 as your base line and see what you get then then your KINDA safe


good luck

[gurusan]

It would be nice to have an answer to the question, though. I know nobody can say exactly how long a CPU will last, but it would be good to get at least a couple of years out of it. It seems nobody can say exactly how much voltage is too much, because I see the question being asked constantly and there are never any logical replies.

Intel specs the absolute max vcore and max vtt in their product sheet as 1.45V

[Dee]

Is that right, Gurusan? I read somewhere that they said no more than 1.3625 max voltage, which is in line with what HDCHOPPER said.

Just for fun I'm currently underclocked. I am at 2.56GHz on 0.968V. This maintains a decent RAM speed over DDR1000 and the machine is still fast! It's way quicker than my old AMD 4800+ X2 at 3.00GHz. I ran Prime and the highest temp for each core reached 30/35. Does Pi 1M in 18 seconds. For comparison, my friend's Q6600 takes 21 seconds at stock.

Any less than 1.00V set in BIOS and the machine won't boot.

[gurusan]

for reference Intel specs the Q6600 max vcore and vtt at 1.55v......and we all know those are totally fine for that voltage as well as even higher.

http://download.intel.com/design/pro...hts/318732.pdf

[zlojack]

Those are ABSOLUTE max and min.

There's another document that says 1.36v is the "safe" limit.

I am going to go higher than that once I redo my loop and my CPU gets its own rad, because right now my temps get a bit high when I pump over 1.4v into it.

As Ivan Drago said: If he dies, he dies.

[Dee]

I tried 1.4V and 4.3GHz on this E8600 and it just won't stabilize. 4.25GHz and 1.376 is Prime stable, so what gives? Another 50MHz and a fairly big jump in vCore, yet it errors out in Prime with hardware failure messages. Is it time to mess with other BIOS settings, such as GTL, PLL Termination, etc?

[dnottis]

I tried 1.4V and 4.3GHz on this E8600 and it just won't stabilize. 4.25GHz and 1.376 is Prime stable, so what gives? Another 50MHz and a fairly big jump in vCore, yet it errors out in Prime with hardware failure messages. Is it time to mess with other BIOS settings, such as GTL, PLL Termination, etc?

Thats how most chips overclock, you get to a point of diminishing returns. I can honestly say that with the right cooling and lapping all chips will hit a point where they need alot more voltage to move up slightly with prime stability. Its up to the user to decide if the extra voltage and heat is worth the additional 50 - 100mhz. What you are describing happens with every CPU I've ever used.

With the 4 E8400 C0s I had, getting 4.1 was easy, 4.2 need alot more volts and got alot hotter. One would go all the way to 4.3Ghz. Again needing alot of volts to pass that point though.

The quad in my sig will go up to 3.74 @ ~1.38v - to hit 3.8 I need ~1.46v and it runs alot hotter. A full tenth to move 50 more mhz. After that I cannot maintain prime stability.

[LagunaX]

I tried 1.4V and 4.3GHz on this E8600 and it just won't stabilize. 4.25GHz and 1.376 is Prime stable, so what gives? Another 50MHz and a fairly big jump in vCore, yet it errors out in Prime with hardware failure messages. Is it time to mess with other BIOS settings, such as GTL, PLL Termination, etc?

On my ds3l 4.4ghz on my e8500 e0 requires +1 on fsb termination voltage and 1.4v on the northbridge with active northbridge cooling.

On my asus p5k 4.2ghz e8400 C0 requires 1.4 on the northbridge too.

Funny though on my Mars board I can set the northbridge to 1.2 for 4.3ghz on my e8600es.

[HDCHOPPER]

Is that right, Gurusan? I read somewhere that they said no more than 1.3625 max voltage, which is in line with what HDCHOPPER said.

Just for fun I'm currently underclocked. I am at 2.56GHz on 0.968V. This maintains a decent RAM speed over DDR1000 and the machine is still fast! It's way quicker than my old AMD 4800+ X2 at 3.00GHz. I ran Prime and the highest temp for each core reached 30/35. Does Pi 1M in 18 seconds. For comparison, my friend's Q6600 takes 21 seconds at stock.

Any less than 1.00V set in BIOS and the machine won't boot.

ya my bad it's 1.3625 my meds were kickin in and the memory is going
thats why eyem moving up to Domminators 8888 cas4

[HDCHOPPER]

for reference Intel specs the Q6600 max vcore and vtt at 1.55v......and we all know those are totally fine for that voltage as well as even higher.

http://download.intel.com/design/pro...hts/318732.pdf

65nm is soooo much forgiving than 45nm on voltage

but this is XTREME FORUM'S ppl rock em till thay burn or untill ya see the magic blue smoke

[loonym]

It would be nice to have an answer to the question, though. I know nobody can say exactly how long a CPU will last, but it would be good to get at least a couple of years out of it. It seems nobody can say exactly how much voltage is too much, because I see the question being asked constantly and there are never any logical replies.

Think of it this way. A lot of folks here are pushing these things hard. If they were dying from it I think there would be more posts to that effect.

[Quad-Damage]

I got a 8500 for 170 at Newegg and it was E0, got it yesterday

[LagunaX]

I got a 8500 for 170 at Newegg and it was E0, got it yesterday

Nice they are $189 now.

[dnottis]

Anyone have results from an E0 E8500 Q822A yet?

Mine is in the mail from SoCal Parcel post - could take another week to get here.

[LagunaX]

Anyone have results from an E0 E8500 Q822A yet?

Mine is in the mail from SoCal Parcel post - could take another week to get here.

q822a here:
http://www.xtremesystems.org/forums/...&postcount=288

[busta_dude]

Guyz, I juz bought OEM of E8500 batch no Q815A570. Any idea if this is a good chip?

[Boble76]

Here's some results of my E8500 Q814A156

tests and screenshots

1.610V @ 5002MHz suicideshot with +25C water.
1.58V @ 4750MHz SP32M (water +25C)
1.490V @ 4503MHz SP32M (aircool)
1.344V @ 4303MHz SP32M (aircool)

[DiscoTech]

Another reference for E8500:

A quick test on the Biostar Tpower I45 motherboard.

E0 Stepping
Q822A535

http://www.xtremesystems.org/forums/...31#post3267731

[pcaddict]

boble76, thats nice! hyvä suomi