How much faster is ddr333 then pc133sdram?

[jtw]

I am going to upgrade my motherboard from an Intel d845wnl (using 256mb pc133 sdram) to a Asus P4S8X (using 256mb ddr333). I will reuse the cpu, a 1.5ghz Pentium4. How much faster will my computer be? Will it be very noticable? Or will it only be marginally faster? I know that the ddr333 will have a max of 2.7gigs/sec, but what about the pc133 sdram? Thanks for your time in advance!

 

[irwincur]

If I remember correctly PC133 should have a max bandwidth of about 1Gb/sec. So if the mobo supports the faster ram you should see a good speed boost, during sustained data transfers. But PC133 tends to be more efficient during the inital burst and as such most small data transfers (which are more common then large ones) will not give you a significant boost. So expect higher performance during loading and gameplay but little difference for something like word processing.

 

[RU482]

How much faster is ddr333 then pc133sdram?

that's easy...33Mhz

 

[jackwhitter]

sdr = single data rate (i think) and
ddr = double data rate

sdr reads/writes information only once during each clock cycle, but ddr ram can write information on the rise and fall of each clock cycle (resulting in 2 read/writes, woo, i can add). i'm not wholly sure on the exact specifics as i'm not an EE major or anything, but that, i think, is the basic premise. also, ddr333's base clock cycle is 33 mhz faster like redly said, but it is not like comparing apples to oranges. also, sdr has 168 physical pins vs. ddr's 184 physical pins.

 

[RU482]

I was being a smartass..

 

[Rubberbband]

You should see a noticeable difference just don't expect miracles.

 

[stonecold3169]

Last week I changed out my abit kt7a-RAID and 512mb of pc133 with a soyo Dragon ultra platinum kt333 and 512mb of pc2700. It is VERY noticable. Things are much more responsive now, benchmarks (as if they matter) are much higher now as well. It is definitely noticable, most notably in games, but also in daily tasks

 

[Sunner]

For K7 CPU's, the difference increases as the speed of the CPU does, but it's nothing spectacular though.

For P4 CPU's it's a completely different matter, you should see a very good good performance boost.
Have a look at this, the P4's with SDRAM get crushed by pretty much everything.