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DDR2 mixing speeds and impact on performance.

Last response: in Components
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April 24, 2011 11:43:49 AM

Hi

I have been aquiring some second hand parts from work and was wondering. I have 2gb ddr2 800 (see sig for other specs) and have another 2gb ddr533. i have looked at this http://www.tomshardware.com/reviews/pushing-ddr2-ram-ma... although its a bit old seems to indicate not much fps diff in games. what do you all think? should i add the 2gb 533 for 4gb. or just keep the 2gb 800? i realise ram is cheap, but i have it lying round just wondered if its worth it? i could possibly overclock the ram to 667....
April 24, 2011 12:33:38 PM

just keep the 800 as it will be forced to run at 533 if you add the other ram 2 and your rite it wont make much diff to performance.
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April 24, 2011 1:30:16 PM

I think not..I would rather keep faster ram than more ram.
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April 24, 2011 3:17:25 PM

If you have 32-bit you get barely 1GB for general and none for gaming IIRC.

IMO, It depends on what you do, heavy internet browsing/multitasking eats away RAM fast and the extra 2GB (regardless of speed) would help, but for strictly gaming, keep the 2GB of 800s.

Though if your Mobo lets you, oc the 533 to 800 and all is good.
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April 24, 2011 3:32:55 PM

thats a big ask from 533 ram to jump to 800. it will already be at 1.8 or more volts and unlikely to have heatsyncs. you also have to take latency into account often older boards will give limited options on ram configs, and will often force a mix of latency's when you mix speeds. this alone can stress the mmu to the point either it or the ram fails.
if it had of been 667 then i would have said go for it as most ram will give 10-15 percent or so but again the latency would have to be very close to the original ddr2 800's.
and im not just talking the first 4 i mean all of the timings
as above said if your not gaming then running all the sticks at 533 would work well enough if the latency is close as the 800 will probably have a jdec/spd rating close to the 533 ram, but if there to different it again will cause problems.

so over all i would say no as there just to different. so the end result is more likely to be a fail of 1 sort or another.
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Best solution

April 24, 2011 4:56:53 PM

iam2thecrowe said:
Hi

I have been aquiring some second hand parts from work and was wondering. I have 2gb ddr2 800 (see sig for other specs) and have another 2gb ddr533. i have looked at this http://www.tomshardware.com/reviews/pushing-ddr2-ram-ma... although its a bit old seems to indicate not much fps diff in games. what do you all think? should i add the 2gb 533 for 4gb. or just keep the 2gb 800? i realise ram is cheap, but i have it lying round just wondered if its worth it? i could possibly overclock the ram to 667....


i think you should get another ddr2 800 because keeping the older ram won't do you any good as the mix speed ram would having latency spd issue, voltage and conflict with northbridge which it would cause system instability. ddr2 667 would work fine with ddr2 533 duo to similar SPD/CL/voltage but ddr2 800 is rather close to ddr2 1066. beware: mixing speed is much danger than mix ram with different size. don't try it if you don't know what you're doing.
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April 27, 2011 4:21:30 AM

Best answer selected by iam2thecrowe.
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April 27, 2011 4:23:25 AM

all good valid answers. I have thought about most of the issues you all brought up but the general consensus is to stick with the 800mhz ram. Thanks everyone for your input. ill just use the 533 ram in my second computer and buy some more ddr800 when i get the chance.
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