OCZ PC4000 Platinum EB 2GB vs OCZ PC4000 PlatinumEL XTC 2GB?

I've decided on the final make up of my rig except for the ram. I want to o/c to 2.5 - 2.6 Ghz if possible. So my question is, which is better OCZ PC4000 Platinum EB 2GB or OCZ PC4000 Platinum EL XTC 2GB? Or is there so little difference between the 2 that it wouldn't matter?

cheers for the help


My Proposed rig:
Case: Thermaltake Kandalf
Mobo: DFI LANPARTY UT NF4 Ultra D Motherboard
PSU: OCZ Powerstream 520W
CPU: AMD Opteron 64 170 Dual Core Processor
Cooler: Zalman CNPS 9500 LED Cooler
Grease: Arctic Silver 5

RAM: ????
GPU: HIS X1900XTX 512mb IceQ

HDD1: Western Digital Digital 160G SATA 16Mb Cache
HDD2: Western Digital 320GB SATA-II 16MB Cache
Sound: Creative Sound Blaster X-Fi Platinum
DVDRW: Sony DRU810A INT 16X DVD +/- DVDRW DUAL LAYER
DVD: Sony 16x DVD