I have an older machine. I'm planning to upgrade its RAM memory (DDR2-Synch DRAM PC3200). I mostly find memory speeds of 533, 667 and 800 mhz. Does it have a significant impact if I install cards with higher speeds?
Machine specs:
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Take a look at the answers to this question: [Can A 800MHz Memory Stick Be Used In A 400MHz Slot](http://superuser.com/questions/8511/can-a-800mhz-memory-stick-be-used-in-a-400mhz-slot) – An Dorfer Jul 29 '14 at 19:49
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If your motherboards BIOS has a way to force a specific memory speed and timings you can get all of them to work correctly using lowest common denominator settings. – cybernard Aug 01 '14 at 03:14
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Reading the specs from your link, I presume your motherboard can take DDR2 DRAM PC3200 as the maximum speed of your memory sticks. PC3200 is memory at 400Mhz.
If you put a higher clocked memory it will work at 400Mhz. The only difference might be in the latency, but for normal people who don't work or game only benchmarks all day, there is no visible difference.
So the answer is no, you won't see any significant impact.
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I wouldn't suggest faster memory many motherboards won't boot with faster memory installed. – Ramhound Jul 29 '14 at 20:03
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@Ramhound where did you get that idea? [Higher-speed DDR2 DIMMs are compatible with lower-speed DDR2 DIMMs although the motherboard or CPU memory controller will be bound to the limits of the lower-performance modules.](http://en.wikipedia.org/wiki/DDR2_SDRAM#Backward_compatibility) I put DDR2 DIMMs 800Mhz in DDR2 667Mhz compatible PC and it worked, I put mixed 667Mhz and 800Mhz DDR2 SO-DIMMs into 533Mhz compatible laptop and it worked. – Jul 29 '14 at 20:09
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the hundreds of Superuser questions on this subject say otherwise my personal experience and techical knowledge agrees with you ( for the most part) I still like the (it depends) when dealing with memory and motherboards – Ramhound Jul 30 '14 at 01:42