• 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.

Info Dual EPYC 7601 build. Comments and questions ?

Markfw

Markfw

Moderator Emeritus, Elite Member
So, here is is. Dual EPYC 7601 32 core CPU's and 256 gig ECC registered DDR4 2666 ram, with a 1 tb NVME and a 2 tb spinner drive. 128 threads of greatness ! About $3400 for 2 CPU's, memory and the motherboard. About the same prices (and possibly performance) of the new 3970x. But I do have 8 memory channels. Then again, it only runs at 2400 mhz. But it only runs 50c 100% loaded. I can see why they run so slow after seeing the manual and the 1u heatsinks they were intended to run using.

jn4qQn2.jpg
 
Since you say its probably similar performance to a 3970x, how does it compare in perf/watt?
I believe in another thread you said the MB allows for 7002 series cpus, what cpu models are you going to keep an eye out for in the future to upgrade?
 
Yeroon said:
Since you say its probably similar performance to a 3970x, how does it compare in perf/watt?
I believe in another thread you said the MB allows for 7002 series cpus, what cpu models are you going to keep an eye out for in the future to upgrade?
Click to expand...
Its probably worse perf/watt than the 3970x. I got it because I can't find a 3970x anywhere. Its draws 450 watts from the wall. The only consolation is that the performance is probably similar, and the cost is about the same and I can BUY it.

Edit: looking for dual 7742's, but thats $15000 and out of my budget right now.
 
Markfw said:
Its probably worse perf/watt than the 3970x. I got it because I can't find a 3970x anywhere. Its draws 450 watts from the wall. The only consolation is that the performance is probably similar, and the cost is about the same and I can BUY it.

Edit: looking for dual 7742's, but thats $15000 and out of my budget right now.
Click to expand...
Pretty incredible Mark. I did notice you still need to upgrade your sig. ;-)
 
Are these Zen or Zen 2 based Epycs?
 
What hurtz does it run at under full load? Any higher than factory base clock? Wondering if it runs like a zen+ ir a zen as far as clocks.
 
cellarnoise said:
What hurtz does it run at under full load? Any higher than factory base clock? Wondering if it runs like a zen+ ir a zen as far as clocks.
Click to expand...
Only 2400 mhz. You can't OC these. But boy do they run cool....50c full load ?
 
Also what happened to the es 7551's? They mislabeled or duds? Sure hope you did not lose out on those...

Excited to see performance numbers from you soon. Both energy and raw h.p.
 
cellarnoise said:
Also what happened to the es 7551's? They mislabeled or duds? Sure hope you did not lose out on those...

Excited to see performance numbers from you soon. Both energy and raw h.p.
Click to expand...
Well, I can't return them, and I can't find a motherboard they will work on. I am emailing a support area from a vendor, and if I can get the right bios, I can use them. But at over $500 a motherboard for a 1 socket, its going to be spendy. 2990wx's will be cheaper on ebay. (maybe)
 
Markfw said:
Well, I probably should reverse them. But it requires that I take the motherboard out to get the thefan clips, and I don't feel like it. They are only running 50c like this, so why bother ?
Click to expand...
I'd only reverse them if you can fit them under the heatsinks. Well mostly because I prefer push over pull. I don't think it really matters and I don't think that there is a real difference in case air flow at this level by having them send air down the case versus up. Or I should word that better, I don't think it affects temps more than maybe a degree here or there. It's not ideal, but I don't think it actually affects anything in any realistically measurable way.
 
StefanR5R said:
I get 1.0...1.4 million PPD with 88 threads in Folding@home, which is 1.5...1.8 times of what 56 threads can do.
Now I certainly am wondering what happens if 128 threads are thrown into a single Folding slot.
Click to expand...
hmmm.... I may have to try that. Right now its catching me up on Rosetta because it has all that extra memory....

And researching a new motherboard for the 7551 ES chips I still have !
 
scannall said:
AMD says all core boost is 2700. Perhaps it's a motherboard limitation, or a bios thing?
Click to expand...
Got me. Its a new bios, and a new motherboard that even supports the 7002 series (rome) and there is no overclocking, and its definitely loaded 100%. Not sure, but lscpu says 2400 (linux)

mark@dual-7601:~$ lscpu
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): 128
On-line CPU(s) list: 0-127psensor
Thread(s) per core: 2
Core(s) per socket: 32
Socket(s): 2
NUMA node(s): 8
Vendor ID: AuthenticAMD
CPU family: 23
Model: 1
Model name: AMD EPYC 7601 32-Core Processor
Stepping: 2
CPU MHz: 2389.172
CPU max MHz: 2200.0000
CPU min MHz: 1200.0000
BogoMIPS: 4399.41
Virtualization: AMD-V
L1d cache: 32K
L1i cache: 64K
L2 cache: 512K
L3 cache: 8192K
NUMA node0 CPU(s): 0-7,64-71
NUMA node1 CPU(s): 8-15,72-79
NUMA node2 CPU(s): 16-23,80-87
NUMA node3 CPU(s): 24-31,88-95
NUMA node4 CPU(s): 32-39,96-103
NUMA node5 CPU(s): 40-47,104-111
NUMA node6 CPU(s): 48-55,112-119
NUMA node7 CPU(s): 56-63,120-127
Flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm constant_tsc rep_good nopl nonstop_tsc cpuid extd_apicid amd_dcm aperfmperf pni pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw skinit wdt tce topoext perfctr_core perfctr_nb bpext perfctr_llc mwaitx cpb hw_pstate ssbd ibpb vmmcall fsgsbase bmi1 avx2 smep bmi2 rdseed adx smap clflushopt sha_ni xsaveopt xsavec xgetbv1 xsaves clzero irperf xsaveerptr arat npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold avic v_vmsave_vmload vgif overflow_recov succor smca
mark@dual-7601:~$
 
Last edited:
Markfw said:
And how would I do that ????
Click to expand...

lscpu shows you have the precision boost flag enabled and the base clock is 2.2 GHz, so at 2.4 GHz you are boosting, just not as high as the max all core boost frequency. Given you're running DC applications which tend to be very heavy duty and your temps are fine, seems like you're just running into a power/current limit. You can try looking for the cTDP setting if it is available in the BIOS and unlocking a bit more power that way, but if it's not in there then it seems like everything is working as expected and that just because the load is so heavy, you're not reaching your max all core boost frequency (but again, you're still above base which is the guaranteed all core frequency).
 
You must log in or register to reply here.

TRENDING THREADS

Back
Top