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Probs with P5B Dxe and D805

Forum Overclocking : General Discussions - Probs with P5B Dxe and D805

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herb1   08-05-2006 at 11:49:26 AM

Has anyone overclocked the D805 using the 965 chipset? I can't get it to do anything good at all.

The rest of the components are great - DDR1066 and Seasonic 600W.

It fails at FSB of 148 :-(

Thanks
Herb

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gomerpile   08-05-2006 at 04:30:14 PM
- 0 +

Turn down the dram fsb to 166 or 133 and go from there oc the system clock untill the dram speed matches 266 speed. Second is what version is the stepping Ao or BO the AO does not oc very well

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herb1   08-06-2006 at 02:38:19 AM
- 0 +

Cpu-z says its Revision B0 and stepping 7 so it should be OK.

I'm not aiming to get a big OC out of this chip - its just a stopgap till e6600 actually arrives in australia, but can't believe that it won't do anything. I've tried locking the PCIex and PCI to 100/33 as well in case they were causing it to fail. I have left the RAM voltage as it is cause its running quite underspeed, but have upped the CPU V in steps to 1.4 with no luck either.

I do have 4 drives on it in RAID 5 - could that be upsetting it? When it does boot XP64 is all over the place and refuses to give 100% to my grid projects - when it eventually gets fired up it jumps up and down and won't sit on 100%.

I am really having no luck - after a couple of days now. Are there any links where I can read up on what I am doing?

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gomerpile   08-06-2006 at 03:37:31 PM
- 0 +

It must be the board cannot think of anything different I read something about the board for ocing should be an 8 phase regulator in other terms should have 8 coils if you dont know what they look like, some are black and square and others are round and are wrapped in copper.
Asus P5WD2-E Premium (Intel 975x)
Asus P5WD2-WS Premium (Intel 975x)
Asus P5WD2 Premium (Intel 955X)
Gigabyte G1975X Turbo (Intel 975X)
Gigabyte 8I955X Royal (Intel 955X)L/li>

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herb1   08-06-2006 at 10:36:00 PM
- 0 +

I'm got tired of waiting for the E6600 to make it around the world to Australia so am using the 805 for a stopgap.

I have it stable at 3.3GHz now cause I didn't realise that I had to turn the memory speed down to keep it stable. The FSB is running at 166 and the memory at DDR443 or something close to that. I will run some benchmarks when I get a chance and read up on what that memory is doing in case its overall faster with a slower CPU and the original DDR533 speed. Tho I know there is stuff I will have to find the time to read up on here :-)

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gomerpile   08-07-2006 at 10:41:39 AM
- 0 +

If you increase the wait states of the memory you can reach higher cpu speeds, after you are happy with the system fsb and is running stable you can change some timings slowly. Disable system bios cache, this save a little memory. Increasing the volts is helpfull but I dont think your board has the 8phase desgin be carefull you can actually harm your hd when running 3 gHZ and over.

Reply to gomerpile
herb1   08-07-2006 at 11:33:29 AM
- 0 +

Howdy Gomerpile

The pc is much more stable now I have put XP32 onto it. I put 2 raid arrays into it (2 mirrored for C: and 3x Raid 5 for data) and I think XP64 drivers were not happy, but now its great - just sits on redline day and night doing its grid calculations.

It does have 8 phase power supply! Cool. The chip should be OK I reckon, cause everyone is getting good OC's from this one. Its running at FSB 166 not 133 on stock everything (fan+volts) which is a lame OC for this chip. I'll have a read up on this memory ratio stuff soon.

Thanks for the help !
Herb

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