Why won't it go further?

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Why won't it go further?

Original Message

Name: topcat2007
Date: November 20, 2006 at 21:32:09 Pacific
Subject: Why won't it go further?
OS: Win XP
CPU/Ram: Venice 3000+
Model/Manufacturer: A8N Sli Premium

Comment:

Hey guys, I am perplexed here.
Venice @ 278 * 9 = 2500 mhz
Corsair Value Ram 2 x 512 MB @ DDR266 = DDR 359 OC
ASUS A8N SLI Premium (Flashed a deluxe)
I got the vcore maxed at 1.550 (reads 1.600 in CPUz)
Chipset is at 1.6v
HT at 1.25v
mem is stock(2.6v)
Why can't I go higher? Instability sets in around 285 mhz FSB. My temps are fine; 43 load in the case prime95 torture. I have the voltage maxed out. I can get the FSB to 300 with a lower multiplier.
Venice 3000+ 278 x 9 = 2500mhz
A8N-SLI-Deluxe Flashed to Premium
2 x Corsiar ValueRam DDR400 @DDR266
Gigabyte 6600gt @590/1180

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Response Number 1

Name: Kailas
Date: November 21, 2006 at 00:48:01 Pacific
Subject: Why won't it go further?

Reply: (edit)

thats with the HT multiplier set to __ ?
I remember having hit ~2550 MHz and stable (prime 95) with my 3000+ Venice on the A8N-E. That was with the HT multiplier set to 3x. Vcore was at 1.425V. I dont think you need to push the Vcore beyond 1.45V or 1.46V.

Kailas Shastry
3000+ Venice, A8N-E, 768MB DDR266, 160GB Barracuda, 380W Cooler Master

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Response Number 2

Name: jam
Date: November 21, 2006 at 07:27:58 Pacific
Subject: Why won't it go further?

Reply: (edit)

I haven't looked into to it, but what did you gain by flashing a Deluxe with the Premium BIOS?
I'm in agreement with Kailas...there generally isn't a need to bump the vcore up so much. And as he pointed out, you neglected to list the HT multi, but I kinda doubt that it's at 4x.

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Response Number 3

Name: topcat2007
Date: November 21, 2006 at 09:30:03 Pacific
Subject: Why won't it go further?

Reply: (edit)

Umm... HT multiplier is at 3x. Do I have a gimp venice or something? Gonna drop the vcore to 1.45v. Hexus.net got a 3000 venice to 300 x 9 with stock voltage...
Venice 3000+ 278 x 9 = 2500mhz
A8N-SLI-Deluxe Flashed to Premium
2 x Corsiar ValueRam DDR400 @DDR266
Gigabyte 6600gt @590/1180

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Response Number 4

Name: topcat2007
Date: November 21, 2006 at 09:38:55 Pacific
Subject: Why won't it go further?

Reply: (edit)

The premium bios includes voltage options for chipset and ht.
Ahhh.. it won't load windows @ 1.45 volts. During the windows load screen, where the bar goes across, the monitor turned rainbow and then it went black, I'm thining instability... I must have a gimp venice then?
Venice 3000+ 278 x 9 = 2500mhz
A8N-SLI-Deluxe Flashed to Premium
2 x Corsiar ValueRam DDR400 @DDR266
Gigabyte 6600gt @590/1180

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Response Number 5

Name: topcat2007
Date: November 21, 2006 at 09:39:30 Pacific
Subject: Why won't it go further?

Reply: (edit)

Oh yeah ht is at 3x
Venice 3000+ 278 x 9 = 2500mhz
A8N-SLI-Deluxe Flashed to Premium
2 x Corsiar ValueRam DDR400 @DDR266
Gigabyte 6600gt @590/1180

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Why can't it go faster?? Why can't I go over 350 Mhz? Why can't it go faster?? 2nd post Athlon 2100XP won't run at 266fsb CPU is unworkable or has changed	Overclock how too? Asus A7N8X Deluxe won't work at 400 OC Athlon 3700+, Won't POST... abit Fatal1ty FP-IN9 won't overcloc XP-M 2500 won't oc anymore!?

Response Number 6

Name: Kailas
Date: November 21, 2006 at 23:27:42 Pacific
Subject: Why won't it go further?

Reply: (edit)

Stupid question: How do you know it is a Venice?
Did you check with CPUZ / checked the part number?
AFAIK, even with stock voltage of 1.4V the 3000+ venice does ~2.3GHz w/ no problem. With some luck you can gain another 50-100MHz. But to hit 2.5GHz, you need to up the Vcore just a little bit. 1.425V is what I need, and someone else may need a little higher, but not 1.55V. When we are talking of millions of transistors, however tiny, even a 0.025V is substantial.
At 1.55V, I wonder what your idle temps are.
Try this: In the BIOS (not PC Probe or CPUZ), what is the lowest Vcore with which you can sustain 2.5GHz?
I know this is not very practical for most people, but, can you put your CPU in another board that supports overclocking and see how it (your CPU) behaves?
Kailas Shastry
3000+ Venice, A8N-E, 768MB DDR266, 160GB Barracuda, 380W Cooler Master

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Response Number 7

Name: topcat2007
Date: November 23, 2006 at 17:37:53 Pacific
Subject: Why won't it go further?

Reply: (edit)

Yeah, and I remember ordering a venice. It is most definitely a venice.
It is revision DH-E3, so it is a venice. I am currently running stable(prime95) at 300*8 with 1.550v. I know this is an excellent overclock, but I wanna hit 2.7GHZ so bad. This chip should easily be able to.
Gonna see how low I can get the voltage down now...
Venice 3000+ 278 x 9 = 2500mhz
A8N-SLI-Deluxe Flashed to Premium
2 x Corsiar ValueRam DDR400 @DDR266
Gigabyte 6600gt @590/1180

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Response Number 8

Name: topcat2007
Date: November 23, 2006 at 20:01:34 Pacific
Subject: Why won't it go further?

Reply: (edit)

prime 95 @1.50v
So I did some research and the DH-E3 stepping isn't as good as just a plain E3 stepping. Sigh... any1 know where i can get an E3 venice?
Just kidding... but seriously... I think think this is the limit of the chip.
Venice 3000+ 278 x 9 = 2500mhz
A8N-SLI-Deluxe Flashed to Premium
2 x Corsiar ValueRam DDR400 @DDR266
Gigabyte 6600gt @590/1180

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Response Number 9

Name: topcat2007
Date: November 23, 2006 at 20:38:27 Pacific
Subject: Why won't it go further?

Reply: (edit)

Um... temps are 29C , 42C idle/load @ 1.550v ROFL
Venice 3000+ 278 x 9 = 2500mhz
A8N-SLI-Deluxe Flashed to Premium
2 x Corsiar ValueRam DDR400 @DDR266
Gigabyte 6600gt @590/1180

Report Offensive Follow Up For Removal

Response Number 10

Name: Kailas
Date: November 23, 2006 at 22:20:58 Pacific
Subject: Why won't it go further?

Reply: (edit)

FYI,
I have the E6 stepping Venice.
I know o/c is about pushing your existing hardware as much as possible to extract every last ounce of performance from it as possible. But, at 2.4GHz, you have pushed it as far as a stock single core AMD CPU can go (not necessarily the best performance owing to the difference in cache), so it is reason enough to be happy.
From 1.8GHz to 2.4GHz, it is a 33% overclock - good by any standards (dont think of tomshardware, though). So, smile :)
Am a bit surprised about the temp... 42C at full load with your current Vcore.
Kailas Shastry
3000+ Venice, A8N-E, 768MB DDR266, 160GB Barracuda, 380W Cooler Master

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