NPCs not showing up/appearing on screen.

So about the 3rd day of open beta, the 19th, I started to have an issue with NPCs not rendering. I would go to the location of the quest npcs and there would be no one there. I usually had to stand there for a good 40 secs to a minute before they would appear. Sometimes as much as 2 minutes. The first and second day of open beta this never happened once. Well of course it is still doing it now during early access. I asked around only to have no one else say this was an issue. More often then not, the npcs take a minute or so to render.. for almost EVERY npc for me. Players take some time to render for me as well. I currently have the game on high-desktop as it doesnt seemed to fix this one way or the other. I manually set everything to its lowest possible and still waiting on npcs..
Also more often then not, after getting thru the quest dialog I would have to wait 15-20 seconds before the small quest complete/rewards window would appear.

My connection speed is 12mps, tested on a friends connection that he plays on with no problem and my issue still presists. My system is up to date. As is my graphics card. I have uninstalled and reinstalled the game, tried playing in Windowed, fullscreen, nothing changed.

OS Name Microsoft Windows 7 Home Premium
Version 6.1.7601 Service Pack 1 Build 7601
Other OS Description Not Available
OS Manufacturer Microsoft Corporation
System Name *****
System Manufacturer Gateway
System Model GM5472
System Type x64-based PC
Processor AMD Athlon(tm) 64 X2 Dual Core Processor 5000+, 2600 Mhz, 2 Core(s), 2 Logical Processor(s)
BIOS Version/Date Phoenix Technologies, LTD 6.00 PG, 4/27/2007
SMBIOS Version 2.4
Windows Directory C:\Windows
System Directory C:\Windows\system32
Boot Device \Device\HarddiskVolume2
Locale United States
Hardware Abstraction Layer Version = "6.1.7601.17514"
User Name ******
Time Zone Central Daylight Time
Installed Physical Memory (RAM) 8.00 GB
Total Physical Memory 8.00 GB
Available Physical Memory 5.87 GB
Total Virtual Memory 16.0 GB
Available Virtual Memory 13.6 GB
Page File Space 8.00 GB

Name NVIDIA GeForce GTX 260
PNP Device ID PCI\VEN_10DE&DEV_05E2&SUBSYS_0ABA19F1&REV_A1\4&20D6B1B8&0&0048
Adapter Type GeForce GTX 260, NVIDIA compatible
Adapter Description NVIDIA GeForce GTX 260
Adapter RAM 896.00 MB (939,524,096 bytes)
Installed Drivers nvd3dumx.dll,nvwgf2umx.dll,nvwgf2umx.dll,nvd3dum,nvwgf2um,nvwgf2um
Driver Version 9.18.13.2049
INF File oem129.inf (Section002 section)
Color Planes Not Available
Color Table Entries 4294967296
Resolution 1920 x 1200 x 59 hertz
Bits/Pixel 32
Memory Address 0xFA000000-0xFAFFFFFF
Memory Address 0xE0000000-0xEFFFFFFF
Memory Address 0xF8000000-0xF9FFFFFF
I/O Port 0x0000AC00-0x0000AC7F
IRQ Channel IRQ 16
I/O Port 0x000003B0-0x000003DF
I/O Port 0x000003C0-0x000003DF
Memory Address 0xA0000-0xBFFFF
Driver c:\windows\system32\drivers\nvlddmkm.sys (9.18.13.2049, 10.71 MB (11,235,104 bytes), 7/24/2013 3:14 AM)

Not sure what else i should post. On a side note, I can run WoW on Ultra graphic settings with my rig.

This happened to me during the Open Beta as well. I bought a new computer in the interim with a much better - well everything - but seems to me your videa card is old. I had a 400 and I'm now up to a 600 and it's much better.