Missing entities

ISP: Virgin Media
Connection Type: fibre optic
Speed: upto 50mbps
Time: 19:30 GMT
Frequency: sometimes
World name: zodiark
Character name: xillia vesperia
Retainer name: none
NPC name: none
Monster name: *see below*
Class/Level: multiple
Party or solo: both
In-game time: *see below*
Area and coordinates: *see below*
Housing:none
Steps:
1.first instance
a. this was during Lvl 60 dungeon The Lost City Of Amdapor
b. half way through the dungeon i noticed a drop in frames per second from 60 to 25 (this lasts through first to third instance)
c. at this point random monster's entites did not appear on my screen yet were still able to be targeted
D. thiss issue lasted into next instance

2.second instance
a. this was during the lvl 60 raid Void Ark
b. from the start the issues were appearing after taking 9 minutes to load into the activity
c. straight away monsters entites had not appeared on screen yet could be targeted
d. when coming across the Blackguard monster the entity of the monster had not appeared yet the sword and shield had appeared so it seemed you had floating weapons
e. final occurance is with the final boss echidna where she was not visible yet when she split's into echidna sinster and dexter the entities appeared and when remerging she disappears again

3.third instance
a. this is after finishing the void ark raid listed above
b. moving to the coerthas western highlands the frames per second count dropped to 15 per second
c. upon summoning a random flying mount using the flying mount roulette the frames drop to about 10 per second and i am mounted onto a invisible mount (unknown as to which mount spawned)
d. upon trying to move the frame rate falls dangerously low
e. trying to screenshots at this time resulted in getting the error message "screenshot failed"

fourth instance
a. again within the western highlands of coerthas I teleported to the area and had a drop in frames
b. upon using the flying mount roulette i receved a invisible mount again
c. upon trying to move anywhere resulted in the program locking up entirely leaving unable to close the game either closing the program or by using task manager

Connection Specs
- Type of internet connection/provider:fiber optic cable/ virgin media
- Modem maker/model number:virgin media super hub VMDG480
NETGEAR CG3101D-2VGUKS
serial number: 2HA32AUJ28A00

PC Specs
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AMD Piledriver Eight Core FX 8350 4.0GHz
16GB (2x 8GB) DDR3 1600Mhz Dimm
22x DVD Writer
AMD Radeon R9 390 8GB GDDR5
Novatech 750Watt PSU
Novatech Eclipse High Performance Mid Tower Case
GIGABYTE GA-970A-DS3P AMD 970 (Socket AM3+) Motherboard
be quiet! BK009 Pure Rock CPU Cooler with 120mm Silent Wings Fan
Onboard Audio
120GB Solid State Drive
2TB 3.5" 7200rpm SATA Hard Drive
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