DDR 2700 vs 3200 for a P4 800fsb cpu

[sterling]

HI All

I was wondering how much of a difference there would be running 2 sticks of **512mb** 2700 ddr versus 2 sticks of* *256mb** of 3200ddr in a 865pe motherboard running a 2.6 p4 with 800 fsb.

thanks

 

[RussianSensation]

Assuming they both run at same timings probably 2-3% tops (3200 being faster memory and synchronous operation having this slight edge)

If 2700 runs at 2-2-2-6 and 3200 2-3-3-6 or higher, then the slower speed memory with tighter timings will actually be faster

 

[XeoBllaze]

Using slower ram that's not on par with stock performance, and wasn't originally designed to run with the CPU wouldn't be the wisest thing to do. It's just creating a bottleneck that could have been avoided. My advice would be to just save up for some more ram and buy some PC3200 ATM. I recently had a 2.8C and trust me, I would never run it w/ 166MHz memory

 

[robcy]

If the choices are 1gig of DDR2700, and 512mb of DDR3200, then defenitely go with the DDR3200. The performance difference will be greater between the different speeds, then it will be between the size. 512mb is pretty standard, and should not bottleneck your system, while DDR2700 will defenitely bottleneck your 200fsb.

 

[Sid59]

Originally posted by: RussianSensation
Assuming they both run at same timings probably 2-3% tops (3200 being faster memory and synchronous operation having this slight edge)

If 2700 runs at 2-2-2-6 and 3200 2-3-3-6 or higher, then the slower speed memory with tighter timings will actually be faster

boooooo ... that can't be right.

 

[Jigman]

Originally posted by: Sid59

Originally posted by: RussianSensation
Assuming they both run at same timings probably 2-3% tops (3200 being faster memory and synchronous operation having this slight edge)

If 2700 runs at 2-2-2-6 and 3200 2-3-3-6 or higher, then the slower speed memory with tighter timings will actually be faster

boooooo ... that can't be right.

exactly right, russiansensation is deadwrong. If that were the case, no one would overclock past having to lower ram timings. It has been proven many times that faster ram speed in mhz has a much greater performance improvement than cas latency etc

 

[sterling]

Thanks for the replies!

I didnt mention this in my origianal post but I bought 2 sticks of Crucial 512 mb 2700ddr about 6 months ago. It takes me awhile to get around to things. If u guys already owned two sticks of 2700ddr memory that are still sealed in the packages and could sell them and purchase less 3200ddr instead, Do you think its worth the hassle? I dont use my machine for playing games just for work and surfing the web.

thanks again for the help

 

[Sid59]

Originally posted by: Jigman

Originally posted by: Sid59

Originally posted by: RussianSensation
Assuming they both run at same timings probably 2-3% tops (3200 being faster memory and synchronous operation having this slight edge)

If 2700 runs at 2-2-2-6 and 3200 2-3-3-6 or higher, then the slower speed memory with tighter timings will actually be faster

boooooo ... that can't be right.

exactly right, russiansensation is deadwrong. If that were the case, no one would overclock past having to lower ram timings. It has been proven many times that faster ram speed in mhz has a much greater performance improvement than cas latency etc

even then .. the timings of 2 and 3 are barely noticable in real situations. but the difference in 2700 and 3200 can be felt.

 

[Sid59]

Originally posted by: sterling
Thanks for the replies!

I didnt mention this in my origianal post but I bought 2 sticks of Crucial 512 mb 2700ddr about 6 months ago. It takes me awhile to get around to things. If u guys already owned two sticks of 2700ddr memory that are still sealed in the packages and could sell them and purchase less 3200ddr instead, Do you think its worth the hassle? I dont use my machine for playing games just for work and surfing the web.

thanks again for the help

try and sell them on fs/ft forum. if not, ebay them and get some PC3200

 

[Budman]

There's not as much difference as you might think,I run my 2.4c at a fsb of 250mhz & run my ram at 166mhz (pc2700) 1 gig of it & my mem aint exactly lacking.

http://pics.bbzzdd.com/users/Budman/mem_3ghz.JPG

 

[Jigman]

nevertheless if you used pc3200 at the same fsb speed that benchy would be much higher- the p4 is ALL about bandwidth availability - due to the fact it has a long pipeline, stalls will really hurt performance, that is why you need the fastest mem bandwidth possible.

 

[Budman]

Originally posted by: Jigman
nevertheless if you used pc3200 at the same fsb speed that benchy would be much higher- the p4 is ALL about bandwidth availability - due to the fact it has a long pipeline, stalls will really hurt performance, that is why you need the fastest mem bandwidth possible.

for what 1-2% faster? not worth it,I would be losing too much $$ trying to sell pc2700 & then replacing it with pc3200,price vs performance just isn't worth it.

 

[sterling]

THanks for the info guys!

I'm going to be using a Intel 865perl motherboard. I called Intel today and I found
out they only approve of 3200ddr CL3 memory. They said no CL2.5 because of stability problems. Also, this board runs 2700ddr at 320. Would I be better off staying with my crucial 2700ddr?

Budman, u got a point about the money. Eventhough, I got this memory at a terrific price.
I got each of these 512mb 2700ddr for an average of 36 bucks with a coupon. I dont know if 2% is gonna make much difference when i'm surfin the web.