• We’re currently investigating an issue related to the forum theme and styling that is impacting page layout and visual formatting. The problem has been identified, and we are actively working on a resolution. There is no impact to user data or functionality, this is strictly a front-end display issue. We’ll post an update once the fix has been deployed. Thanks for your patience while we get this sorted.

1gb Single rank ddr400 ram? (non-ecc, unbuffered)

S

Stug

Member
Hi, I am building a machine with an AMD Athlon64 X2 3800+ Manchester, using a DFI Lanparty SLI-DR motherboard. The board supports at most 4gb of ram, but because of the cpu, apparently it is only possible to run 4gb at ddr400 if one uses single rank ram. Does anyone know where to find this, and does it exist? The board doesn't support ecc or registered ram, either, which may be a problem. I would like the machine to run with at least 3gb of ram, and preferably at ddr400. That said, what's my best option? Should I switch the mobo for one that supports reg ecc ram (I've seen 1gb sticks of single rank ddr400 with reg ecc, but not without), or compromise and run the ram at ddr333?
 
I could use this myself. My s754 Gigabyte K8N-E motherboard doesn't like my current setup of 2 512MB sticks of Corsair value select - they run at 333mhz. For 2GB @ 400mhz I need single-sided ram. As far as I can tell though, it doesn't exist.

Oddly my older Nforce3 Gigabyte board had no problems running these same 2x 2sided 512MB sticks 🙁
 
In theory, yes. In practice, no. This is because 1-gigaBIT DDR chips are insanely expensive (compared to using twice as many 512-megaBIT chips), so that 1-gigaBYTE DIMMs made from the former economically wouldn't make any sense.

Remember how long the transition took from 512-MByte double-sided to single-sided? We've only this month reached price break-even.

Single-rank reg ECC DIMMs still use 16 chips, btw (+2 for ECC). What's being done here is not use eight chips, each eight bits wide, but use 16 pcs of x4 RAM. Registered DIMMs can hold 32 (+4) chips. The technical reason for using x4 chips here is that good ECC algorithms then can compensate for the loss of an entire RAM chip. (See also: IBM's "Chipkill" patent.)
 
Oh, and don't make yourself such a headache about RAM speeds. As the move to AM2 demonstrates, the AMD64 processors couldn't care less about RAM speed when it comes to real-world performance. The step back from DDR400 to DDR333 makes for much less actual performance loss than the raw RAM bandwidth figures would suggest.
 
You must log in or register to reply here.

TRENDING THREADS

Back
Top