- WHAT IS THE DIFFERANCE BETWEEN PC3 12800R AND PC3 12800E FULL
- WHAT IS THE DIFFERANCE BETWEEN PC3 12800R AND PC3 12800E PC
RAM will not always achieve it's maximum potential speed in a given system, and it can be that it needs to be set manually in the BIOS. PC3-12800 has a data rate of 12800 MB/s and runs internally at 1600MHz (clock speed 800MHz), so can also be called DDR3-1600.ĭDR memory has a clock rate half of its data rating, hence its name Double Data Rate, so in your system the RAM is running at a measured clock rate of 665MHz, which equates to DDR3-1333. Coming from the same batch or manufacturing period is more likely to have similar characteristics so more likely to achieve Dual Channel operation.ĭDR3 and PC3 mean the same thing, one rates by clock speed, the other by data bandwidth. I concur with Louis' suggestion to pair the DIMMs with the same number of either 1242 or 1245, this is probably a manufacturing batch code, I'd expect respectively week 42 & 45 of 2012. The two may be fitted in the two slots that belong to a single channel, but that would be expected to simply produce Single Channel operation, rather than a mismatch error. The Memory Mismatch message probably means the two DIMMs fitted are not close enough in their operating parameters to run in Dual Channel mode, so the system has configured Single Channel. What are the other numbers and values?Īs Louis has said, it's the memory controller in the system (in this case on the CPU) that is Dual Channel, not the memory. What happens, or what are the considerations to understanding these seemingly uncorralated values?Ħ). Mhz value seems self explanitory, but "665MHz" doesn't seem to be an apportionment to the advertised 1600MHz. If any of you can take the time to assist me in reducing my ignorance on this matter, I will be very grateful.ġ).What was the primary achievement in the advances from DDR2, DDR3 and DDR4?Ģ).Since the labels specify "DDR3", why the additional "PC3" in the label? (Is that redundant or is there DDR3 PC2?)Ĥ). Apparently there is more to understanding RAM than I had hitherto believed. Now that I am reading the label on the RAM, it says "1R x 8 PC3 - 12800U -11 - 12 - A1 HMT325U6CFR8C - PB NO AAĮach stick also has a seperate 4-digit series, two with "1245" and two with "1242". Speccy is showing 4GB RAM, but I am surprised to see that it is Single Channel.
WHAT IS THE DIFFERANCE BETWEEN PC3 12800R AND PC3 12800E PC
After the Memory Mismatch message was posted for a few seconds, the PC booted normally and is working fine. I reduced to two sticks and this time got monitor and boot up normally, except there was a message saying something about memory mismatch. As far as I could tell, boot failed - but there was no beeping.
WHAT IS THE DIFFERANCE BETWEEN PC3 12800R AND PC3 12800E FULL
I got nothing on the monitor and the CPU fan started running at full speed. According to, this system is upgradable to PC3-12800 1600Mhz.įirst, I removed the existing RAM and inserted all 4 of the "upgrade" sticks. Those specifications are exactly what I had come to believe I needed, for this HP Compaq 8200 Elite Small Form Factor ( Intel Core i5-2500 3.30GHz), which I believe was a Program Computer, sold without HDD or Operating System and stripped down to 1 stick of RAM DDR3 2R PC3-10600U - 9 - 10 - BO.
This RAM (4 x 2GB) was advertised as DIMM " DDR3 Ram PC3-12800 1600mhz"
I just bought 4, 2GB sticks of RAM I found on ebay (irresistably cheap) and I'm a little confused about what speccy is telling me.
0 kommentar(er)
