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post #4871 of 12377
Quote:
Unfortunately it did solve the issue.
how unfortunate
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post #4872 of 12377
Quote:
Originally Posted by OzzyRuleZ View Post

Gigabyte supplied another member here a beta BIOS that is supposed to address the throttling. Unfortunately it did solve the issue.

At what point is it crashing? I have mine up to 220mhz without doing anything at all.

Yeah I read his post earlier, hopefully they release a working BIOS soon then.

220mhz is actually exactly where I loose stability and either fail to boot windows or get a BSOD when inside windows after a few minutes.
Edited by Hellsrage - 3/31/13 at 8:35am
post #4873 of 12377
Quote:
Originally Posted by Hellsrage View Post

Yeah I read his post earlier, hopefully they release a working BIOS soon then.

220mhz is actually exactly where I loose stability and either fail to boot windows or get a BSOD when inside windows after a few minutes.

Weird. I have had mine up to 230 with the CPU at 4.6ghz but have severe throttling. No BSODs or failed boots. Have you tried bumping up the NB voltage a little?
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post #4874 of 12377
Quote:
Originally Posted by OzzyRuleZ View Post

Why didn't you post this up when Paladine asked about it? My DDR voltage is quite happy at 1.66v without me touching any VTT settings. I'll read up on it just because but I've never had a need to use it.

This is because AMD VTT run different than Intel VTT. Intel the VTT voltage is directly related to the IMC and needs to be manipulated only at high ram OCs and even then is very delicate because the IMC is very touchy to voltage. Amd however uses VTT as the base voltage for the DDR. The board will set the VTT based upon memory voltage input. VTT need to be ~.5 the memory voltage. As you can see .75v is directly related to 1.5v ram voltage (.5 of 1.5). Some can gain a tremendous amount of stability by maintaining their memory voltage as close as possible to the 1.5v mark to keep as close to VTT as possible. This will also allow you to maintain lower latencies at what ram clocks are achievable for the ram in question @ 1.5v.
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post #4875 of 12377
Quote:
Originally Posted by OzzyRuleZ View Post

Weird. I have had mine up to 230 with the CPU at 4.6ghz but have severe throttling. No BSODs or failed boots. Have you tried bumping up the NB voltage a little?

Upped it one bump and manged to actually load to my desktop but it still crashed shortly after.
post #4876 of 12377
confusedsmiley.png I don't know what to do, I really don't I can't seem to get stable at 220mhz (FSB) nothing works. I just went through and spent an hour doing nothing but trial and error, this is really confusing me.
post #4877 of 12377
Hi guys, I am new here and recently just started overclocking the fx 8350 cpu using the 990fxa ud3 motherboard. I have a problem which I need help with. Here is the problem. Everytime I turn the pc on and have fans spinning and LED light up, after about 1-2 seconds it turns off then turns on again and I can here the grinding sound from my DVD drive. I found out that by setting the core boost function to "auto", everything works fine, no problem of turning on then off then on again. However, when I disable the core boost function, this problem arises. What are the solutions to this problem?
post #4878 of 12377
I forgot to mention I am using the rev3.0 990fxa ud3 motherboard with the FC bios
post #4879 of 12377
For your FSB questions the UD3 has FSB dead zones, well at least mine does. Granted mine is a revision 1.0, however that part of the board didn't change. Rev 1.1, 1.2 are adjustments to the power phase system to include LLC, Rev 3.0 incorporates UEFI bios.

for example i can run 200-215mhz fsb, then its unstable from 216-230, then stable again between 231-250.

I've been at 310mhz fsb completely stable.

However their is no reason to FSB overclock the Fx processors. Sure you can play with it some to reach your final clock, otherwise its purely multiplier. Your computer will score the exact same results with 300fsb x 15 (4.5ghz) as it would 200fsb x 22.5 (4.5ghz) Granted the hypertransport and northbridge are still clocked the same. Overall you will just induce more headaches than its worth with bus overclocking.

also VTT on AMD cpu's has nothing to do with IMC. If it does then you wouldn't also have a CPU-NB voltage adjustment which refers to the IMC (also has an effect on L3 cache). VTT on AMD cpus Am2+ and newer refers to the voltage going to the termination logic on the ram. Its default is .5x your Memory voltage. So at 1.5 volts your VTT should be .750. If you have a Dram set to 1.65 volts your VTT should be set to .825 For best stability you should always leave it set to .5 X your memory voltage.
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post #4880 of 12377
For anyone who wants to try the beta drivers for the UD3 rev 3.0 motherboard, just PM me and I can give them to you. Right now tech support is saying they are having no problems on their end when there are clearly issues that have yet to be resolved.
Quote:
Originally Posted by Blizzard001 View Post

Hi guys, I am new here and recently just started overclocking the fx 8350 cpu using the 990fxa ud3 motherboard. I have a problem which I need help with. Here is the problem. Everytime I turn the pc on and have fans spinning and LED light up, after about 1-2 seconds it turns off then turns on again and I can here the grinding sound from my DVD drive. I found out that by setting the core boost function to "auto", everything works fine, no problem of turning on then off then on again. However, when I disable the core boost function, this problem arises. What are the solutions to this problem?

I have that exact same issue, I have no clue to be honest. Does anyone have an answer to this?
Edited by s15sLiDeR - 4/1/13 at 8:23am
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