Can I use DDR2 800 instead of 667?
So long as you purchased PC2-6400 DDR2-800 DIMMs in an appropriate capacity, you can safely use them in place of the PC2-5300 DDR2-667 units specified for use with your particular machine. The inverse is not true: you could not use slower memory modules in a later, faster machine.
Is 800 Mhz ram better than 667 Mhz?
The 800MHz RAM is rated to provide data to the CPU faster than the 667MHz. However they can both operate at 667MHz or lower or even higher, though if its higher than the RAM is rated for its considered to be overclocked.
What is the highest clock speed for DDR2 ram?
DDR2 speeds
| Friendly name | Industry name | Peak Transfer Rate |
|---|---|---|
| DDR2-533 | PC2-4200 | 4266 MB/s |
| DDR2-667 | PC2-5300 | 5333 MB/s |
| DDR2-800 | PC2-6400 | 6400 MB/s |
| DDR2-1000 | PC2-8000 | 8000 MB/s |
Is 667 Mhz ram good?
The short answer is yes. The ram has a delay whenever the CPU need to grab some numbers to crunch. Faster ram will make the numbers get crunched faster. If 667 Mhz is okay for you right now, I wouldn’t upgrade.
Why is my ram speed 667mhz?
667mhz is half of 1333mhz, which means that your ram is running at 1333mhz, which is standard. Just go in your bios and change it to 1600mhz, then it will show you are running it at 800mhz, which is the correct speed.
What’s the difference between DDR2 667 and 800Mhz?
DDR2 667 (PC2-5300) = 5.3GB/sec in single channel 10.6GB/sec in dual channel DDR2 800 (PC2-6400) = 12.8GB/sec in single channel 12.8GB/sec in dual channel With respect to dual channel comparison, its a 133MHz difference which translates into 2.2GB/sec gain from upgrading to 800MHz
Which is better DDR2 667 or 1066mhz FSB?
1066MHz FSB = DDR2 667 ( Good ) OR DDR2 533MHz ( Matched but Slow ) decoupling of clocks plus chip timings considerations. You will not see a difference between CAS 5 and CAS 6 memory timings.
What’s the difference between dual Ethernet and 667Mhz Ram?
The system runs very nice, otherwise. Although they also gimped the Fast Packet and dual ethernet… The primary reason to use it is to allow OCing without reducing the RAM speed multiplier. As other have pointed out, the performance is minimal. I’m curious as to what particular model Dell this is.
Which is better Amoun Core2 or amoun ddr-667?
This is because the Core’s FSB, which runs at 1066MHz is only 64 bits wide, delivering 8.53GBps bandwidth to the CPU. Core2’s memory subsystem is 128 bits wide but even at DDR-667 speeds can deliver 10.67GBps of bandwidth, which means that unless the FSB is at least 1333MHz, the CPU can’t use more memory bandwidth than the amoun DDR-667 can supply.