I know that on some site it says 800Mhz, but they really meant PC800 not 800Mhz, PC800 is 400Mhz, I have 1 Gig of RDRAM PC800. Believe me the fastest is RDRAM PC1066 533Mhz ~Death-Knight~

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bart, death is right, it's PC800, not 800MHz, think logic, the RAM cannot have higher speed than the mobo's bus speed. If for example, the mobo is running at 533MHz FSB, how cna the RAM be 800?

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I understand where you both are coming from but my whole problem then is why do they keep repeatedly saying 800 mhz on those sites then. is it their f--- up or what? I don't want to make enemies here because i've learned quite a bit and sorry if i've came across that way. So as for now the fastest memory between rdram and ddr is the 1066 rdram correct. sorry for the miscommunication guys. NO hard feelings??

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No problem Bart, probably their site web master was typed wrong or they misundertood RAM. We here to make you understand the fact, not to fight with you. ~Death-Knight~

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thanks death for clearing that all up with me. Thanks alot once again. Bart also death how do you type in colors like that? that's pretty cool.

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its rated at 800mhz, because it runs in pairs.

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It's not the "pairs". RDRAM and DDR are rated at double their actual frequency because unlike SDRAM they they are capable of data transmission at the top AND bottom of the frequency sine wave...which is two times per clock cycle (MHz) Processors are the same way....a Pentium 4 400MHz front side bus is actually running on a "quadra pumped" 100MHz FSB....thus it is capable of data transmission four times per bus clock cycle. And a 266MHz FSB Athlon XP is actually running on a DDR (Double Data Rate) 133MHz bus. Hope this helps.

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Hello, I'm about to buy a new computer before the end of the year but I'm not a "pro" when it comes to computer components and I'm a little confused about some things, one of them being what kind of RAM is best. So far, I've chosen 5 configurations that seem good for their price but they differ in the RAM description: 512MB DDR 333MHz 512MB RDRAM, 2 RIMM modules of 256MB (PC800) 512MB DDR 266MHZ - CHIPSET APOLLO PRO 512MB DDR PC333 Two of the configurations have the Chipset Apollo (whatever that is) but which is best? They're all 512MB, but that's all I know. Any imput apreciated, thanks.

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Hi, Maybe I'm wrong but, still... I did a test. I took my XP2000+ IDE ATA133 with 512m of DDR333mhz (WINXP-PRO) and My p3 933mhz SCSI ATA160 with 768m of RDRAM PC800 (WIN2000-PRO). (sorry just sold my p4 1.3ghz scsi with 512rdram who would give best results...) ANYWAY, here the results: FOR THE DDR333MHZ: Summary: 2591 RAM MB/s Memory Read Speed (MB/s): 1120 Memory Write Speed (MB/s): 4171 Memory Copy Speed (MB/s): 2482 Installed RAM (MB): 512 Free RAM (MB): 341 Memory used (%): 33 Page File Driver: 32-bit Total Page File (MB): 1183 Free Page File (MB): 1055 And HERE THE RDRAM-PC800 Summary: 2199 RAM MB/s Memory Read Speed (MB/s): 1978 Memory Write Speed (MB/s): 3075 Memory Copy Speed (MB/s): 1542 Installed RAM (MB): 768 Free RAM (MB): 662 Memory used (%): 13 Page File Driver: 32-bit Total Page File (MB): 1876 Free Page File (MB): 1800 Other informations: DDR CAN NOT read 4k,8 k,16k,32k and 64k block but it can copy and write those block. RDRAM CAN read, copy and write any size of block here the details: DDR33MHZ::::::::: Read speed, 4 KB blocks, MB/s: 0 Read speed, 8 KB blocks, MB/s: 0 Read speed, 16 KB blocks, MB/s: 0 Read speed, 32 KB blocks, MB/s: 0 Read speed, 64 KB blocks, MB/s: 0 Read speed, 128 KB blocks, MB/s: 4292 Read speed, 256 KB blocks, MB/s: 4330 Read speed, 512 KB blocks, MB/s: 870 Read speed, 1024 KB blocks, MB/s: 860 Read speed, 2048 KB blocks, MB/s: 853 Write speed, 4 KB blocks, MB/s: 6241 Write speed, 32 KB blocks, MB/s: 6341 Write speed, 256 KB blocks, MB/s: 3535 Write speed, 2048 KB blocks, MB/s: 568 Copy speed, 4 KB blocks, MB/s: 4613 Copy speed, 32 KB blocks, MB/s: 4645 Copy speed, 256 KB blocks, MB/s: 338 Copy speed, 2048 KB blocks, MB/s: 333 RDRAM:::::::::::::: Read speed, 4 KB blocks, MB/s: 3469 Read speed, 8 KB blocks, MB/s: 3499 Read speed, 16 KB blocks, MB/s: 3460 Read speed, 32 KB blocks, MB/s: 2179 Read speed, 64 KB blocks, MB/s: 2181 Read speed, 128 KB blocks, MB/s: 2179 Read speed, 256 KB blocks, MB/s: 1858 Read speed, 512 KB blocks, MB/s: 322 Read speed, 1024 KB blocks, MB/s: 317 Read speed, 2048 KB blocks, MB/s: 317 Write speed, 4 KB blocks, MB/s: 4412 Write speed, 32 KB blocks, MB/s: 3723 Write speed, 256 KB blocks, MB/s: 3890 Write speed, 2048 KB blocks, MB/s: 275 Copy speed, 4 KB blocks, MB/s: 3829 Copy speed, 32 KB blocks, MB/s: 1915 Copy speed, 256 KB blocks, MB/s: 246 Copy speed, 2048 KB blocks, MB/s: 178 NOTE: DONT FORGET THIS: DDR WAS ON XP2000+ AND RDRAM WAS ON P3 933MHZ. I don't know if that will help you guys (even if we have a big gap between the two cpu) but if I do, good. And if you have anything to had, lets go, I always want to learn more.

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For a while I have been wondering the difference between DDR and RAMBUS. I understand now that RAMBUS as well as DDR are rated at double their actual frequency. Thus RAMBUS 800 has an actual frequency of 400 but when used it's doubled to 800... thats why in my TigerDirect issue as well as all other memery spotings of RAMBUS 800 it has 800 MHZ!!! Thus Bart has been correct all along. But I have found that DDR is in true faster for the most part, check out this... http://www.inqst.com/articles/ddrvrambus/ddrvrambusmain.htm

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i have a few question 1. is there any rambus pc 800 with one modul only right now? 2. i have read Tom Hardware and i found that DDR333(PC2700)can overpower rambus pc800. how can it happen?if we look the bandwith, pc 800 can deliver data 3,2 GB/s and ddr pc 2700 only 2,7 GB/s

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I am very good with rambus becuase it goes in an out of my ass> i am gay? yes__ i love to ram ypur bus. go for ram bus suck my lil balls

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