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post #1 of 6
Thread Starter 
I have been overclocking my CPU but I cannot get it stable at 4GHz because of VDroop. I know there is pencil mod but will it work for my current motherboard, and can somebody tell me how to do it ?

+

My Motherboard is x16/x4 Crossfire and is PCIE 2.0 - Shall I Crossfire, I know If I do a Crossfire with my current 5850 it will out perform the GTX 580.
I was originally planning to get a GTX 580 and run it in single, but If I can Crossfire it will be cheaper and better Performance than a Single GTX 580.


Thanks
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My Gaming Rig
(14 items)
 
  
CPUMotherboardGraphicsRAM
Intel i5 2500K 4.7GHz [24/7] Gigabyte Z77 ATI Radeon 6950 (XFX) Corsair Vengeance 8GB 1600MHz  
Hard DriveOptical DriveCoolingOS
2x 500GB HDD's [RAID 0]  A Non-Branded DVD-DL Burner Zalman CNPSX 10 Performa Windows 7 Home Premium 64 Bit 
MonitorKeyboardPowerCase
2x iiyama Prolite E2407HDS Razer Tarantula 600W OCZ NZXT Tempest 410 Elite 
MouseMouse Pad
Logitech G500 Wooden Desk - LOL 
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post #2 of 6
Single cards are always better than multi GPU, due to stability - Dual GPU can be better at some scenarios, but usually a single GPU is more reliable.


Aaaaaanyways, the x4 shouldn't greatly reduce performance as if you had a x16/x16 mobo. But it will. You should look for some reviews (google for it, you don't want me to do it, right?). Performance will increase with a second card, though, and it's up to you to decide if it's worth. I think it is.

As for the pencil mod - you are going to loose warranty because of it. You sure there isn't a way to disable vdroop? (in non-EVGA mobos it's called LLC)
it works like this:
Vdroop ON = LLC OFF
Vdroop OFF = LLC ON

if you can't, just increase voltages. under idle it's beem proved to be no warm increasing it too much (at least on my CPU)

hope it helps.
post #3 of 6
Be careful when looking at multi GPU configurations. Look at a lot of benchmarks for your screen resolution. Some times one card will perform better than two just like EduFurtado said. Some times you only see a 40-50% increase, just because you add a second card doesn't mean you double your performance.
post #4 of 6
Hey, lukeibob, i might be able to help you out, the mobo you have, is my old mobo, just switched.

Anyways, you can disable the LLC in bios, I found that a LLC of 16,xx% or 19,xx%, will result in the least Vdroop possible.

If you want the oposito of Vdroop, (Voltage overshoot), setting LLC to lower values will raise your Voltage.

If that doesnt work for you, why dont you just raise the voltage?

Phenom II can take up to 1.55v

As for the GPU question, I strongly believe a HD5850 crossfire or HD5850 + HD 5870 crossfire, will get you better framerates than a Single GTX580
post #5 of 6
I suspect he can't disable Vdroop because it's not on his setup screen, since it's called LLC on his board
post #6 of 6
Quote:
Originally Posted by EduFurtado View Post
I suspect he can't disable Vdroop because it's not on his setup screen, since it's called LLC on his board
He cant disable it, but he can ajust the LLC, so that there is MINIMAL Vdroop or V overshoot.

When i used to put 1.55v on that board i used to get fluctuating Vcore of, 1.536v~1.572v at least there wasnt only Vdroop. If i changed the LLC to lower it would overshoot and NO Vdroop.
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