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Fun fact: a lot of user benchmarks of Ryzen Threadripper have lower averages than standard performance. For example passmark and userbench. This is because ma
by bhouston 8y ago
Fun fact: a lot of user benchmarks of Ryzen Threadripper have lower averages than standard performance. For example passmark and userbench. This is because many are running TR with just 2 dimms rather than 4 dimms. This basically reduces performance by +20%. I almost think that AMD should have just not made TR work in this case because the lower than accurate benchmarks hurt then.
I do not know exactly why it has this performance characteristic but I've witnessed it first hand. It is very ease to reproduce with Passmark on Windows.
- NullPrefix 8y ago4 dimm requirement seems kind of asinine. Normal systems can boot and work fine with a single stick of ram.
- bhouston 8y agoWell for high performance systems requiring 4 dimms isn't bad as the tr series has 4 memory controllers.
- tankenmate 8y agoYou don't have to run with 4 DIMMs but you'll run slower if you do; it's kinda like having a one lane road vs a 4 lane road, you can put all your traffic through one lane, but it's a whole lot slower than using four lanes.
- NullPrefix 8y agoThat was not the point I was arguing with. Let me qoute. >AMD should have just not made TR work in this case Where "this case" is <4 dimms.
- EvangelicalPig 8y agoDoes the equivalent Intel platform suffer to the same degree of performance degradation when not using all 4 memory channels?
- tankenmate 8y agoFor the most part yes, the only sizeable difference is the caching/NUMA strategies and implementation between the two platforms (L3 <=> DRAM controller(s), and interconnects if necessary).
- CitizenKane 8y agoIt could be the overall memory bandwidth. Being able to write to various sticks at the same time could do a lot, especially in a CPU with this many cores
- kinghajj 8y agoIt's definitely a memory bandwidth issue, since ThreadRipper 1 has two dies, each of which have direct access to two DIMMs. So if you only have two DIMMs total, one die has to go through InfinityFabric to the other for all memory accesses.
- spamizbad 8y agoWho coughs up boku bucks for a Threadripper and an X399 board and then cheaps out on RAM?
- dman 8y agoIt does feel weird paying more for RAM than you do for your CPU.
- elorant 8y agoWell, let's see. A TR4 mobo can host 8 dimms. Say you want to max out in RAM that's a minimum of $1100. Add at least 10% if you go for ECC modules. Eventually you end up paying for RAM more than what you pay for the CPU. That's why a lot of people are conservative with RAM when they build a new rig. Somehow it doesn't feel right to pay that much money for memory. So you buy the bare minimum and then wait for prices to normalize, which seems like taking forever in this freaking industry.
- dabockster 8y agoRGB > ECC Prove me wrong.
- deleted 8y ago[deleted]
- coherentpony 8y agoECC has a technical benefit whereas RGB has no benefit at all unless you prefer your DIMMs to look like Christmas tree ornaments on acid.
- berbec 8y agoIsn't every blinking light a gigaflop?
- dabockster 8y ago
- darklajid 8y agoIs this a Threadripper or general Ryzen thing? Got this Asus RoG GL702ZC here, didn't upgrade and it comes like that out of the box (16G, just one socket filled) afaik.
- blattimwind 8y agoDesktop platforms (Intel 11xx, AMn) generally have two memory channels. So if you're only running with one module, you're probably leaving performance on the table, regardless of platform.
- Chilirose 8y agoI cant get my 3200 mhz Ram run with my x399 Designare it runs only at 2133 mhz AMD has a big problem there my Z170 Board runs all my ram on 3200 xmp without any trouble Both kits I have are certified for the X399 board but non is working above 2133mhz Very dissapointing