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How do I increase HT link speed

post #1 of 6
Thread Starter 
motherboard is m4a785gm AM2+.

cpu deneb X2 5000+ unlocked to quad.

NB multiplier at 8, cpu HT clock at 245, so NB is 1960mhz.

EDIT-- in BIOS it says HT Link Frequency> HT speed is 200mhz increments from 200 to 1600mhz.

Ive tried 200mhz and it shows 200 HT link in cpu-z, I tried it at 1.2ghz in BIOS cpuz gives 1225mhz.

1.6ghz also gives 1225mhz.


in BIOS the HT link width can be 8 or 16bit I have at auto.
Edited by grandpatzer - 10/20/11 at 6:11pm
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post #2 of 6
http://sites.amd.com/us/Documents/AM...ning_Guide.pdf

HT Link multiplier and (CPU-)NB multiplier are only unlocked on Black Edition processors. The only way you can increase either of these past the highest setting is to increase HT Clock.
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post #3 of 6
Doesn't the HT link speed have a very minimal effect on performance anyway?
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post #4 of 6
Thread Starter 
My understanding is that the stock HT link speed is 1800mhz shown in cpu-z?

when I had 245*11 HT link speed was shown as 1225mhz in cpu-z.

Now I have 260*11 and HT link speed is 1300mhz, seems as if the HT link speed is HT clock*5.

Quote:
Originally Posted by SectorNine50 View Post
Doesn't the HT link speed have a very minimal effect on performance anyway?
I hope so, maybe there is a HT link multiplier in my BIOS that I'm missing, it seems to be at 5.

Anywa I think Ive seen ppl run the NB frequency above 2000mhz but I think having it 1800-2000 is ok and actually safer?

EDIT-- in BIOS it says HT Link Frequency> This I can change from 200 to 1.6ghz in 200 increments.
HT Link does not go above 1300mhz
Edited by grandpatzer - 10/20/11 at 6:12pm
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post #5 of 6
Keep HT Link 2000Mhz +/- 100Mhz always. HT Link (Hypertransport bus/link) will degrade performance and increase instability (due to signal degrading) beyond 2350Mhz - and there's no guarantee that yours will go that far without degrading. Having said that, there is nothing gained by overclocking the HT Link - it's merely a pipeline (albeit a pipeline used to carry data for just about everything on the board).

CPU-NB (IMC/NB) should be overclocked as high as you can get it. For each 10% you increase the CPU/NB speed, memory bandwidth is increased 3-4% and latency is reduced 3-4%. The minimum for RAM is 3x the base speed, so for example 1600Mhz RAM would be base of 800Mhz x 3 = 2400Mhz CPU-NB, but that's just for the RAM, you'll still need to close the gap for the CPU. Anywhere from 2600Mhz to 3000Mhz at 4GHZ for example. I run my CPU-NB at 3250Mhz at 4.5GHZ CPU. You may need to bump CPU-NB voltage up to reach those speeds and anywhere up to 1.5v is ok.
post #6 of 6
Thread Starter 
seems I'm locked at 5 multiplier on mobo.

is 1200mhz HT link enough?
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i5 2500k@stock :( Asus MIVE P67 R9 290 EKWB 1175/1500@+100mV(not tested alot!) ... XMS3 2x4GB 1600mhz 
Hard DriveCoolingOSMonitor
F120 Corsair + C300 64gb Water, Dual D5, Phobya 1080, 19/13 Tubing, T-Line Win 7 64bit home prem XL2411t 144hz TN 
KeyboardPowerCaseMouse
K340 1000w Golden Green Fractal R2 CM Xornet, Razer Abyssus & DA 3.5G 
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