1.6A @160FSB/DDR400 and @182/DDR364 which gives better performance ?

[hobbit]

I have a 1.6A which can run stable @160FSB ratio 4:5 2/3/3/5 and also 182FSB ratio 1:1 2.5/3/3/6 on a P4B533-V with Samsung PC2700 256 MB single side module. Which setting should I use ?

 

[THUGSROOK]

OOooo, thats a close toughy.

before i answer - what is your voltage @ 182fsb?

(i think i just gave you your answer)

 

[hobbit]

182FSB @1.725V tem 54C mobo temp 32C
I let 160FSB sit @1.7V temp 52C mobo temp 32C.
I have not tried lowering voltage for 160FSb. I think it can be lower.

 

[THUGSROOK]

have you tested with prime95 for stability? you really should.

 

[hobbit]

Both settings run prime95 for hours without crashing.

 

[Mikki]

Prime 95 stable @ 182fsb? Geez, I need to try another 1.6A.............

Nice overclock

 

[THUGSROOK]

Originally posted by: Mikki
Prime 95 stable @ 182fsb? Geez, I need to try another 1.6A

me too :Q

 

[hobbit]

Actually the one before this one managed to run prime 95 for hours @184 FSB @1.75 volt. I got greedy and fried it by pushing it to 188FSB (3008 MHz) @ 1.775. It ran stable for a while then it gave me windows protection error at boot time at all speed. So I RMA it and got this one which is a tad less capable than the previous one. BTW should I up the RAM voltage to 2.85 volt ?
I am still waiting for Thugsrook,s definitive answer

 

[THUGSROOK]

oh, um, hold on while i pickup my chin off my desk.

182fsb 364DDR will crush 160fsb 400ddr.
actually 170fsb 340ddr is faster than 160fsb 400ddr too
the cross over is around 167fsb 334ddr depending on how well your system runs.

2.7v max for ram.
adding ram voltage slows down your performance when needed for stability - catch 22

 

[Mikki]

You folks are killing me
:disgust:

 

[hobbit]

Thanks Thugsrook for the answer. I made a mistake on my post. The RAM setting should be 2.5/3/3/6 for 160 FSB and 2/3/3/5 for 182 FSB. BTW at DDR400 the cycle time for prime95 is 0.256, at 182/DDR384 the cycle time is 0.271 sec. This is quite contrary to your suggestion that 182 FSB gives better performance.

 

[THUGSROOK]

id run alot more benchmarks before making that decision.

its also possible that your moboard cant really handle that speed and isnt giving you full performance for one reason or another.

the p4b533-V isnt really known for its super high fsb speeds. its mostly used for the 4:5 ratio.

perhaps a regular p4b533 would give you better performance @ 182fsb. i know mine runs great upto 180fsb. (even tho i have to throw a ton of voltage at the cpu)

 

[oldfart]

182 FSB??? 2.9 GHz??? WOW!! That is just sick. Nice overclock!