Athlon 64 Async OC comments

[vvume]

Hi,

Most of the websites that deal with overclocking have nothing positive to say about async overclocking. While I understand that it certainly not as good as 1:1 overclocking, doing an async might still produce better results than much lower 1:1 overclocking?

I managed to overclock my athlon 64 3000+ 754 from 2.0Ghz to 2.39Ghz using Thermaltake Venus 12 air cooling on my MSI K8N Neo Platinum board. I have cheap crosair/micron value ram that is not stable at anything other than 3-3-8-3 at DDR 400. Even 5-10 notches seem to crash the system. So I set the DDR to 333 and raised the FSB to 239 (the last stable FSB) value to get the cpu speed at 2.39Ghz. I was able to notch up an impressive 10 points (40->50) on Matlab Bench program (looped 10 times) that tests cpu, memory and graphics. Async doesn't see to be bad at all. The max FSB I was able to do in sync mode was around 205 or so.

Before overclocking:

http://www.vijayv.org/misc/comp/normal.jpg

after overclocking:
FSB:239
HTT Multiplier: 4
Cpu Multiplier: 10
Memory 166 (199 after overclocking)
Timings: 3-3-8-3
CPU Voltage: 1.55
Mem voltage: auto
AGP: 67
CPU Temp: 31-33 C Idle, 39-44 C Full Load
Case Temp: 38 C
http://www.vijayv.org/misc/comp/oc.jpg

Looks like cpu intensive programs can benefit a lot from the higher speeds of a async mode than a much lower cpu speed in a sync mode.

Any comments?

vvume

 

[miketheidiot]

its not as important, but clock speed is much better

 

[vvume]

I managed to increase the OC (stable) by a bit:

FSB:242
HTT Multiplier: 4
Cpu Multiplier: 10
Memory 166 (201 after overclocking)
Timings: 3-3-8-3
CPU Voltage: 1.55
Mem voltage: 2.7
AGP: 67
CPU Temp: 31-33 C Idle, 39-44 C Full Load
Case Temp: 38 C

 

[Appledrop]

ya athlon64 doesnt mind a divider

 

[selfbuilt]

Were you looking at A64 reviews? All the ones I've seen agree that running async results in little or no degradation in performance (which matches my own experience, and everyone else here it seems). Async was a major problem on the XP platform, which lacked an integrated memory controller (huge loss in performance that typically more than offset any o/c gains) .... what you were reading was probably a hold-over from that era.