Dual core Xeon 5260 - 2 processor temp difference

[eagletwo2]

I have a HP Workstation XW8600 running windows 7 pro with two Intel Xeon 5260 dual core processors 3.33GHZ, 8gb ram and GTX 660 2gb graphics card, with multiple 1TB hard drives and three optical drives.

I have been upgrading this machine, and recently installed the second Intel Xeon 5260 processors 3.33GHZ, along with the stock heat sink; identical to the heat sink on the first processor. I am using Speed Fan to monitor temps.

I have found that the first (main) CPU runs 15f to 18f degrees hotter than the second CPU. Question is: is this normal? I originally thought the temp difference was attributed to the use of the new Arctic Silver thermal paste on the second CPU, but after cleaning the original chip (& heatsink) and applying the same paste, I only gained a 2f temp drop.


At idle the Cores run at:

Core 0: 100F
Core 1: 102F
Core 2: 84F
Core 3: 81F

When gaming, (Battlefield 3) core temps:

Core 0: 136F
Core 1: 138F
Core 2: 123F
Core 3: 124F

Is this normal? I have this machine pretty well maxed out, running a 1050W power supply with only a ram fan, exhaust fan, and fans on the heat sinks. No intake fan, would adding a intake fan bring down my temps?

Also note that the fans are set at 3/4 speed via BIOS, 100% speed is noticeable louder...so I try to keep the fan speed down to minimize the white noise.

 

[Tradesman1]

Intake fan would help, also might check fan speeds on CPUs, might check thermal compound application on first CPU, but also keep in mind #1 CPU tend to get most of the load, so not unuasal for it to be a bit higher....can also look to see if there are load balancing options between the CPUs