Overclock.net › Forums › AMD › AMD - General › why is it so hard
New Posts  All Forums:Forum Nav:

why is it so hard - Page 2

post #11 of 21
^ yea Id say I am poor hit on the head there. With Intel they seem to overclock higher due to the lack of an integrated memory controller. This creates higher (bad) latencies to RAM, BUT it also decreases the chance of a high FSB causing an error in the RAM.

If you are ONLY overclocking with multi's that is the lame way to do it. Most of the time you will see more performance gain while increasing the FSB. Both of my recent AMD chips went well past 300fsb without a problem, you just need one of 2 things:
1) amazing RAM (my TCCDs continue to run DDR625 at 3-4-4-6-1T, they run DDR575 @ 2.5-3-3-6-1T)

OR

2) hueg RAM dividers (FBS/2 = RAM freq. and so on)
    
CPUMotherboardRAMHard Drive
AM2+ Phenom 9600 Black Edition ASUS M3A32-MVP Deluxe/Wifi 2x1GB DDR2-1066 Corsair Dominators 4x Western Digital 2500AAKS 
Optical DriveKeyboardPowerMouse
Sata DVD+-RW/DL DUCKY DK1008 w/ GREEN ALPS FSP Group 600w Logitech wireless laptop mouse 
Mouse Pad
MTG 2013 promo 
  hide details  
Reply
    
CPUMotherboardRAMHard Drive
AM2+ Phenom 9600 Black Edition ASUS M3A32-MVP Deluxe/Wifi 2x1GB DDR2-1066 Corsair Dominators 4x Western Digital 2500AAKS 
Optical DriveKeyboardPowerMouse
Sata DVD+-RW/DL DUCKY DK1008 w/ GREEN ALPS FSP Group 600w Logitech wireless laptop mouse 
Mouse Pad
MTG 2013 promo 
  hide details  
Reply
post #12 of 21
I'm at 3.1 Stable... but it uses more volts than I'd like.
post #13 of 21
aha..this might help
Quote:
Originally Posted by Melraidin
Big thanks to YiffyGriffy for suggesting this possible cause for a limited OC.

This isn't so much an answer as a guideline. Myself, I have an A64 3400+ DTR (2200 MHz stock). I've talked with a number of other people who have the same chip, as well as others who have different variants of the Athlon 64.

No matter the cooling, it seems no one has been able to push their Athlon 64's past the point that their memory controller is running at 250 MHz. The Athlon 64's memory controller runs off a divider from the CPU's actual core speed that matches the CPU's multiplier. This works wonderfully for reducing memory latency when running stock: if your CPu is at 11 x 200 MHz (2200 MHz), your memory controller will be running at 2200 MHz / 11 (200 MHz). This is at stock speeds. Now if you overclock your CPU to 11 x 240 MHz (2640 MHz), your memory controller will be running at 240 MHz. Again, most likely to be stable. But as soon as you try to push much further, perhaps to 11 x 255 MHz (2805 MHz), you're likely to encounter instability as the memory controller will be running well above it's rated speed (actual speed of 255 MHz).

This also holds true for other multipliers. For example, if you were to take an Athlon 64 3400+ DTR and lower the multiplier to 10x you would be likely to encounter instability at around 255 MHz HTT (2550 MHz CPU) as the memory controller again would be running at 255 MHz, well above stock.

This would seem to indicate that if you're in the market for an Athlon 64 you should be looking for higher multipliers to enable higher OCs, as this would allow you to push the CPU speed to its limits without hitting the memory controller's limit near 250 MHz.
PURE ACTION!
(14 items)
 
  
CPUMotherboardGraphicsRAM
AMD Phenom II X4 955 GA-990XA-UD3 NVIDIA GeForce GTX 460 Corsair  
RAMHard DriveOptical DriveOS
Corsair  2x500GB 7200.11 RAID 0 + 320GB 7200.11 1x DVD Windows 7 x64 
MonitorKeyboardPowerCase
22" Acer WS Logitech Ergo 700W OCZ GameXstream Antec 300 
Mouse
MX-600 
  hide details  
Reply
PURE ACTION!
(14 items)
 
  
CPUMotherboardGraphicsRAM
AMD Phenom II X4 955 GA-990XA-UD3 NVIDIA GeForce GTX 460 Corsair  
RAMHard DriveOptical DriveOS
Corsair  2x500GB 7200.11 RAID 0 + 320GB 7200.11 1x DVD Windows 7 x64 
MonitorKeyboardPowerCase
22" Acer WS Logitech Ergo 700W OCZ GameXstream Antec 300 
Mouse
MX-600 
  hide details  
Reply
post #14 of 21
Thread Starter 
I have no cooling issues, I am sittin' at 3Ghz, I can use a fsb oc which I usually do, but I think I'd rather leave it how it is, all I want to do it keep it at a 15x200, then change the fsb to 214 and get a clean 3.2GHz oc. I have tried in the past, and the oc in my sig is the farthest I've gotten.
Blue & Red
(10 items)
 
  
CPUMotherboardGraphicsGraphics
AMD FX-6100 M5A97 LE R2.0 XFX HD 7770 black edition Ghost  XFX HD 7770 black edition Ghost  
RAMRAMHard DriveOS
Gskill  Gskill Samsung 840 Pro SSD Windows 10 pro X64 
MonitorKeyboard
ASUS 23.5 1080P Steelseries 
  hide details  
Reply
Blue & Red
(10 items)
 
  
CPUMotherboardGraphicsGraphics
AMD FX-6100 M5A97 LE R2.0 XFX HD 7770 black edition Ghost  XFX HD 7770 black edition Ghost  
RAMRAMHard DriveOS
Gskill  Gskill Samsung 840 Pro SSD Windows 10 pro X64 
MonitorKeyboard
ASUS 23.5 1080P Steelseries 
  hide details  
Reply
post #15 of 21
if you dont have any cooling issues, bump up the volts and see what you get
PURE ACTION!
(14 items)
 
  
CPUMotherboardGraphicsRAM
AMD Phenom II X4 955 GA-990XA-UD3 NVIDIA GeForce GTX 460 Corsair  
RAMHard DriveOptical DriveOS
Corsair  2x500GB 7200.11 RAID 0 + 320GB 7200.11 1x DVD Windows 7 x64 
MonitorKeyboardPowerCase
22" Acer WS Logitech Ergo 700W OCZ GameXstream Antec 300 
Mouse
MX-600 
  hide details  
Reply
PURE ACTION!
(14 items)
 
  
CPUMotherboardGraphicsRAM
AMD Phenom II X4 955 GA-990XA-UD3 NVIDIA GeForce GTX 460 Corsair  
RAMHard DriveOptical DriveOS
Corsair  2x500GB 7200.11 RAID 0 + 320GB 7200.11 1x DVD Windows 7 x64 
MonitorKeyboardPowerCase
22" Acer WS Logitech Ergo 700W OCZ GameXstream Antec 300 
Mouse
MX-600 
  hide details  
Reply
post #16 of 21
Quote:
Originally Posted by Melraidin
Big thanks to YiffyGriffy for suggesting this possible cause for a limited OC.

This isn't so much an answer as a guideline. Myself, I have an A64 3400+ DTR (2200 MHz stock). I've talked with a number of other people who have the same chip, as well as others who have different variants of the Athlon 64.

No matter the cooling, it seems no one has been able to push their Athlon 64's past the point that their memory controller is running at 250 MHz. The Athlon 64's memory controller runs off a divider from the CPU's actual core speed that matches the CPU's multiplier. This works wonderfully for reducing memory latency when running stock: if your CPu is at 11 x 200 MHz (2200 MHz), your memory controller will be running at 2200 MHz / 11 (200 MHz). This is at stock speeds. Now if you overclock your CPU to 11 x 240 MHz (2640 MHz), your memory controller will be running at 240 MHz. Again, most likely to be stable. But as soon as you try to push much further, perhaps to 11 x 255 MHz (2805 MHz), you're likely to encounter instability as the memory controller will be running well above it's rated speed (actual speed of 255 MHz).

This also holds true for other multipliers. For example, if you were to take an Athlon 64 3400+ DTR and lower the multiplier to 10x you would be likely to encounter instability at around 255 MHz HTT (2550 MHz CPU) as the memory controller again would be running at 255 MHz, well above stock.

This would seem to indicate that if you're in the market for an Athlon 64 you should be looking for higher multipliers to enable higher OCs, as this would allow you to push the CPU speed to its limits without hitting the memory controller's limit near 250 MHz.
Then how do you explain the 3600? Maybe the memory controller on the brisbanes runs slower?
Satisfaction
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core i5 4690k MSI z97-g45 Gaming Sapphire Tri-X R9 290 Corsair Vengeance 
Hard DriveOSCaseMouse
Hitachi Windows 8.1 DeepCool Tesseract Gigabyte m6880x 
  hide details  
Reply
Satisfaction
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core i5 4690k MSI z97-g45 Gaming Sapphire Tri-X R9 290 Corsair Vengeance 
Hard DriveOSCaseMouse
Hitachi Windows 8.1 DeepCool Tesseract Gigabyte m6880x 
  hide details  
Reply
post #17 of 21
yeah..i heard that the new CPU's are on a large divider...i dont know exactly where, but i did hear it somewhere
PURE ACTION!
(14 items)
 
  
CPUMotherboardGraphicsRAM
AMD Phenom II X4 955 GA-990XA-UD3 NVIDIA GeForce GTX 460 Corsair  
RAMHard DriveOptical DriveOS
Corsair  2x500GB 7200.11 RAID 0 + 320GB 7200.11 1x DVD Windows 7 x64 
MonitorKeyboardPowerCase
22" Acer WS Logitech Ergo 700W OCZ GameXstream Antec 300 
Mouse
MX-600 
  hide details  
Reply
PURE ACTION!
(14 items)
 
  
CPUMotherboardGraphicsRAM
AMD Phenom II X4 955 GA-990XA-UD3 NVIDIA GeForce GTX 460 Corsair  
RAMHard DriveOptical DriveOS
Corsair  2x500GB 7200.11 RAID 0 + 320GB 7200.11 1x DVD Windows 7 x64 
MonitorKeyboardPowerCase
22" Acer WS Logitech Ergo 700W OCZ GameXstream Antec 300 
Mouse
MX-600 
  hide details  
Reply
post #18 of 21
Thread Starter 
huh... maybe I should try upping to voltage more
Blue & Red
(10 items)
 
  
CPUMotherboardGraphicsGraphics
AMD FX-6100 M5A97 LE R2.0 XFX HD 7770 black edition Ghost  XFX HD 7770 black edition Ghost  
RAMRAMHard DriveOS
Gskill  Gskill Samsung 840 Pro SSD Windows 10 pro X64 
MonitorKeyboard
ASUS 23.5 1080P Steelseries 
  hide details  
Reply
Blue & Red
(10 items)
 
  
CPUMotherboardGraphicsGraphics
AMD FX-6100 M5A97 LE R2.0 XFX HD 7770 black edition Ghost  XFX HD 7770 black edition Ghost  
RAMRAMHard DriveOS
Gskill  Gskill Samsung 840 Pro SSD Windows 10 pro X64 
MonitorKeyboard
ASUS 23.5 1080P Steelseries 
  hide details  
Reply
post #19 of 21
what are ypur temperatures under load?
PURE ACTION!
(14 items)
 
  
CPUMotherboardGraphicsRAM
AMD Phenom II X4 955 GA-990XA-UD3 NVIDIA GeForce GTX 460 Corsair  
RAMHard DriveOptical DriveOS
Corsair  2x500GB 7200.11 RAID 0 + 320GB 7200.11 1x DVD Windows 7 x64 
MonitorKeyboardPowerCase
22" Acer WS Logitech Ergo 700W OCZ GameXstream Antec 300 
Mouse
MX-600 
  hide details  
Reply
PURE ACTION!
(14 items)
 
  
CPUMotherboardGraphicsRAM
AMD Phenom II X4 955 GA-990XA-UD3 NVIDIA GeForce GTX 460 Corsair  
RAMHard DriveOptical DriveOS
Corsair  2x500GB 7200.11 RAID 0 + 320GB 7200.11 1x DVD Windows 7 x64 
MonitorKeyboardPowerCase
22" Acer WS Logitech Ergo 700W OCZ GameXstream Antec 300 
Mouse
MX-600 
  hide details  
Reply
post #20 of 21
Thread Starter 
at a 1.55vcore at 14x215
43c Idle right now, just got out of GRAW2 MP Demo ><!!
Blue & Red
(10 items)
 
  
CPUMotherboardGraphicsGraphics
AMD FX-6100 M5A97 LE R2.0 XFX HD 7770 black edition Ghost  XFX HD 7770 black edition Ghost  
RAMRAMHard DriveOS
Gskill  Gskill Samsung 840 Pro SSD Windows 10 pro X64 
MonitorKeyboard
ASUS 23.5 1080P Steelseries 
  hide details  
Reply
Blue & Red
(10 items)
 
  
CPUMotherboardGraphicsGraphics
AMD FX-6100 M5A97 LE R2.0 XFX HD 7770 black edition Ghost  XFX HD 7770 black edition Ghost  
RAMRAMHard DriveOS
Gskill  Gskill Samsung 840 Pro SSD Windows 10 pro X64 
MonitorKeyboard
ASUS 23.5 1080P Steelseries 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: AMD - General
Overclock.net › Forums › AMD › AMD - General › why is it so hard