HWBot chitchat: OCTB to the TOP - Page 41

Massman · 2nd February 2009, 23:30

Quote:

Originally Posted by thorgal

Q822A433 ; pack date 08/04/08

500FSB no post at all btw. Can you tell me how much vNB you need for that approx ? And VTT ? Don't think it's that though as I've tried various configs. Almost ready here to throw everythign out of the window, I'm that frustrated

In overclocking there are always to aspects that determine the quality of the motherboard: voltage and limit. The first is quite simple to explain: the less voltage you need for a certain setting, the more you have left to push your system even further. To find out if the motherboard is of high quality in terms of voltage scaling we try to find the lowest voltage settings needed for 500FSB, which is a barrier that most people try to reach when overclocking. 500x8, for instance, gives you already 4GHz at a relatively low vcore (as most 45nm C2D's run at <1.2v stock); 500x9 gives you 4.5ghz, which is doable if you have good air-cooling. In case of Asus and MSI, which we tested for voltage scalability as well, we always needed to increase the Vmch (voltage of the northbridge) a little bit to get 500FSB rockstable. The DFI P45 on the other hand, hits 500FSB with the lowest voltages set in the bios for the chipset!

thorgal · 3rd February 2009, 06:34

Quote:

Originally Posted by Massman

In overclocking there are always to aspects that determine the quality of the motherboard: voltage and limit. The first is quite simple to explain: the less voltage you need for a certain setting, the more you have left to push your system even further. To find out if the motherboard is of high quality in terms of voltage scaling we try to find the lowest voltage settings needed for 500FSB, which is a barrier that most people try to reach when overclocking. 500x8, for instance, gives you already 4GHz at a relatively low vcore (as most 45nm C2D's run at <1.2v stock); 500x9 gives you 4.5ghz, which is doable if you have good air-cooling. In case of Asus and MSI, which we tested for voltage scalability as well, we always needed to increase the Vmch (voltage of the northbridge) a little bit to get 500FSB rockstable. The DFI P45 on the other hand, hits 500FSB with the lowest voltages set in the bios for the chipset!

Then I'm screwed, no other words for it. Will have to plug E8600 into DFI X48 to see which one of the two it is (board or cpu).

Edit : which bios did you use ?

Massman · 3rd February 2009, 09:52

0725, best there is afaik (though an unofficial bios)

thorgal · 3rd February 2009, 10:44

Quote:

Originally Posted by Massman

0725, best there is afaik (though an unofficial bios)

Last Q: VTT for E8500 @ 500FSB ? Did you have to use GTL-ref ? Any other tweaks ?

Massman · 3rd February 2009, 11:13

500FSB was completely untweaked: I just set the lowest voltages and boot 500x8 (vcore was raised though)

thorgal · 3rd February 2009, 13:01

Quote:

Originally Posted by Massman

500FSB was completely untweaked: I just set the lowest voltages and boot 500x8 (vcore was raised though)

Oh well, CPU can be RMA'd so it seems so no harm done.

thorgal · 3rd February 2009, 22:27

Quote:

Originally Posted by Massman

500FSB was completely untweaked: I just set the lowest voltages and boot 500x8 (vcore was raised though)

I'm totally baffled honestly. I can make 4Ghz with 400x10, 1.375V (not very good, but at least I made it

). ANything over 425FSB is a "C1" though, and I honestly don't know how to fix that.

Only 1 question : is this the board or the CPU ? What do you think ? I can RMA the cpu, but not much use if it's the board. Another question : could it be the ram ? Which ram did you use (currently on Corsair dominator) ?

geoffrey · 3rd February 2009, 22:33

I honestly wouldn't RMA a cpu if it wouldn't hit the overclock you'd hoped for.

thorgal · 3rd February 2009, 22:37

Quote:

Originally Posted by geoffrey

I honestly wouldn't RMA a cpu if it wouldn't hit the overclock you'd hoped for.

The cpu is eligible for RMA, as it is defective (the stuck sensor bug is a known issue for Intel, they'll replace it for sure).

But to answer your statement : why should I keep it when I can't OC it ? So what should I use it for : heating the room ? I bought it specifically to OC, so if it doesn't meet it's requirements, it has to go.

Massman · 3rd February 2009, 22:52

Quote:

Originally Posted by thorgal

I'm totally baffled honestly. I can make 4Ghz with 400x10, 1.375V (not very good, but at least I made it

). ANything over 425FSB is a "C1" though, and I honestly don't know how to fix that.

Only 1 question : is this the board or the CPU ? What do you think ? I can RMA the cpu, but not much use if it's the board. Another question : could it be the ram ? Which ram did you use (currently on Corsair dominator) ?

From the looks of it, it seems that you either have the worst dfi P45 or the worst E8600. 4G with 1.375v is really weak, so I'm leaning towards the E8600 being crap, although I can't figure out why that would affect the FSB ocability so badly.

3rd February 2009, 09:52	#403
Massman [M] Reviewer Join Date: Nov 2004 Location: Waregem Posts: 6,465	0725, best there is afaik (though an unofficial bios) __________________

3rd February 2009, 11:13	#405
Massman [M] Reviewer Join Date: Nov 2004 Location: Waregem Posts: 6,465	500FSB was completely untweaked: I just set the lowest voltages and boot 500x8 (vcore was raised though) __________________

3rd February 2009, 22:33	#408
geoffrey [M] Reviewer Join Date: Nov 2004 Posts: 4,117	I honestly wouldn't RMA a cpu if it wouldn't hit the overclock you'd hoped for. __________________

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Massman bursts into World's TOP 10 Overclockers List at HWbot	jmke	WebNews	2	16th March 2010 18:12
HWBOT Country Competition - 7 weeks, 7 stages, 7 prizes, 150 competing countries	Massman	Project Worklogs & Benchmarks	40	5th November 2009 09:29
HWBOT Announces Country Cup 2009 - All Belgian OCers Report in!	jmke	WebNews	0	30th October 2009 15:25
Massman hits TOP 50 of HWbot	jmke	General OC-Team Forum	11	10th March 2009 00:44
ASUS EN9800GTX TOP Graphics Card	jmke	WebNews	0	27th July 2008 14:26
The TOP 10 of TOP 10 Lists ~ A Digg List Experiment	jmke	WebNews	0	9th August 2007 11:15
ASUS EN7600GS TOP Silent Incorporates ReverseCool Technology Fan-less Design	jmke	WebNews	0	23rd June 2006 10:37
The Fast and The Quiet: ASUS 7800GT Top Silent /2HDTV	jmke	WebNews	0	22nd May 2006 17:42
hwbot, 18 months later	RichBa5tard	Project Worklogs & Benchmarks	23	10th January 2006 07:50