I have a similar issue. Hand-made i7 box (single CPU) has almost twice the memory and CPU performance as a dual Xeon with 32G memory R420. Very disappointed so far.
Christer, did you ever manage to get the box working properly?
No we didn't get any big improvements. I also ran tests with memtest86+. After Dell support came back to us with similar numbers when they'd tested on a machine I accepted it as not being a defect with our particular machine. I tested the machine with only one CPU and moved 1 memory module to that CPU, thus enabling triple channel. Got a boost (around 50% IIRC). Thus proving the dual or triple channel is in effect. I did buy 2 extra DIMMs to get 96 GiB RAM but more importantly, a little bit more in memory bandwidth.
Thanks Christer. I will try out performance with the third channel running and see if we need to buy more memory. Currently 32G with two channels per CPU (4 x 8G sticks).
Richard1234321
2 Posts
0
September 15th, 2014 20:00
I have a similar issue. Hand-made i7 box (single CPU) has almost twice the memory and CPU performance as a dual Xeon with 32G memory R420. Very disappointed so far.
Christer, did you ever manage to get the box working properly?
DigproSys
3 Posts
0
September 19th, 2014 01:00
Hi Richard.
No we didn't get any big improvements. I also ran tests with memtest86+.
After Dell support came back to us with similar numbers when they'd tested on a machine I accepted it as not being a defect with our particular machine. I tested the machine with only one CPU and moved 1 memory module to that CPU, thus enabling triple channel. Got a boost (around 50% IIRC). Thus proving the dual or triple channel is in effect. I did buy 2 extra DIMMs to get 96 GiB RAM but more importantly, a little bit more in memory bandwidth.
/ Christer
Richard1234321
2 Posts
0
September 21st, 2014 18:00
Thanks Christer. I will try out performance with the third channel running and see if we need to buy more memory. Currently 32G with two channels per CPU (4 x 8G sticks).