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Northbridge overclocking.

post #1 of 2
Thread Starter 
So lately i have been playing battlefield 3 and for my set up my fps seemed quite low, especially in the back to karkand expansion pack

My system is:
amd phenom ii x4 955 4.2 ghz
990fz sabertooth motherboard
msi gtx 580 lightning
850w psu
8gb ddr3 1600mhz ram

From watching my gpu usage when playing battlefield 3 at ultra with msaa off i noticed that the cause of my low fps was a cpu bottleneck. But i thought even at 4.2ghz a cpu bottleneck? something must be wrong. After some thinking and guessing i found that my northbridge was the bottleneck. When i overclocked it from 2000mhz to 2600mhz my fps went up and incredible amount. In areas where i was getting 35 fps i now get 48-55 fps. In areas where i got 50-60 fps i now get 70-85 fps. However if i leave msaa off my gpu usage jumps around from 85-99% in a sort of chaotic manor. Before my Northbridge overclock i sometimes would go down to 65-70%. With msaa on x4 my gpu usage is 100%. So i wonder if i brought my Northbridge higher my performance would increase more. The problem is at 2800mhz my computer wont boot i even tried adjustion voltages i and i though that the phenom ii could easily reach 3000mhz? Is there something i am doing wrong?
post #2 of 2
Your north-bridge is your memory controller, right?

Try over-volting RAM and see if you can increase your northbridge speeds.
Deus Ex Machina
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Dell Computer 5 Series/3400 Series Chipset Fami... 
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Athlon 64 X2 6400+  Asus M2N-E Nforce 500 SLi 8800GT  9800 GT 
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Deus Ex Machina
(19 items)
 
   
CPUMotherboardGraphicsRAM
i5 580M Dell 0R1203 NVIDIA Quadro FX 2800M Samsung 4Gb 
Hard DriveHard DriveOptical DriveOS
TOSHIBA MK3256GSYF  TOSHIBA MK3256GSYF  DVD-Rom HL-DT-ST DVD+-RW GU40N Windows 7 Professional 
Audio
Dell Computer 5 Series/3400 Series Chipset Fami... 
CPUMotherboardGraphicsGraphics
Athlon 64 X2 6400+  Asus M2N-E Nforce 500 SLi 8800GT  9800 GT 
RAMHard DriveOptical DriveOS
OCZ ReaperX WD LG lightscribe Multilayer DVD burner Windows 7 
PowerCase
Antec 500W Smartpower 2.0 Aspire X-Navigator 
  hide details  
Reply
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