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EVGA 02G-P4-2645-KR GeForce GT 640 2GB 128-Bit DDR3 PCI Express 3.0 x16 HDCP Ready Video Card
  • Verified Owner
  • Owned For: 1 month to 1 year

Pros: Single slot, also single-slot cooler
All outputs are digital
Can use 3 displays at once
Good performance
Better bandwidth than 1.5 GB/3 GB OEM version
Works out of the box in current versions of all 3 main OSes

Cons: HDMI requires adapter
No GDDR5 so some bandwidth limits, but good enough to use MadVR
Not as fast or power-efficient as Maxwell/750 models
Does not do UEFI out of the box; still requires firmware update
Fan is loud

Other Thoughts: Mini-HDMI connector does not work well with all cases
No DisplayPort/miniDP, so no G-sync support

EVGA Support:
Having owned the 4 GB variant, I asked for a UEFI/GOP firmware update to avoid the need for CSM/BIOS compatibility mode. Last time they mistakenly sent me the 2 GB version then the 4 GB version of the appropriate video BIOS. I can't find the links/files anymore, and now they say they are having trouble finding an updated video BIOS. I would not care, but this is a prototype and performance/compatibility are important. I would like that new video BIOS to do native EFI boot for all 3 OSes in use.

EVGA 04G-P4-2647-KR GeForce GT 640 4GB 128-Bit DDR3 PCI Express 3.0 x16 HDCP Ready Video Card
  • Verified Owner
  • Owned For: less than 1 day

Pros: Single-slot, and supports 3 DVI/HDMI outputs, works well as a drop-in replacement for a GTX 650 in all 3 mainstream OSes, no auxiliary power connector

Cons: Extremely loud! The fan slowly decreases in speed after a few minutes until it is barely audible, but at high speeds, it is extremely loud. Perhaps a firmware update or an RMA is in order?

PNY VCGGTX6501XPB GeForce GTX 650 1GB 128-Bit GDDR5 PCI Express 3.0 x16 HDCP Ready Video Card
  • Verified Owner
  • Owned For: 1 month to 1 year

Pros: Still a good, efficient card.

Cons: Even if your system has UEFI for fancy-schmancy Windows 8 features like Secure Boot and Ultra Fast Boot, you'll still need to have the VBIOS loaded via CSM mode in your BIOS: in other words, there is no UEFI Video BIOS on this card, so you have to load part of the BIOS layer to initialize the card (i.e. get any signal out of it).

Other Thoughts: I'm in touch with PNY's support about this issue; Nvidia says that Kepler-based chips should work fine with UEFI features; thus PNY will probably need to release a VBIOS update to enable GOP (and not VESA/BIOS) functionality. Windows 8 Secure Boot will be unavailable if you use this card.


Barrett W.'s Profile

Display Name: Barrett W.

Date Joined: 03/11/04

  • Reviews: 23
  • Helpfulness: 10
  • First Review: 05/13/05
  • Last Review: 05/20/14
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