Willem Programmer Comparison Table:

True USB GQ-4X <->True USB GQ-3X <-> PCB5.5C <-> PCB5.0 C 

Model	True USB GQ-4X	True USB GQ-3X	Willem Parrellel PCB5.5C	Willem Parrellel PCB5.0C
Programmer type	True USB	True USB	Parrellel	Parrellel
Other names/Alias	USB willem/ True USB PRO	USB willem/ True USB	Willem EPROM Pro Wilem Ultimate Window Willem PCB5.5C	Enhanced Dual Power Willem Willem PCB6.0
PC Interface/data communication	True USB:USB-USB	True USB:USB-USB	Parrellel Printer Port	Parrellel Printer Port
With own Enclosure	Yes	None	None	None
Support more DIP chips	Yes	No	No	No
Pin count ZIF socket	40pin	32pin	32pin	32pin
Fully Automatic	Yes	Yes	No (Manual setup needed)	No (Manual setup needed)
Jumpers on board	None	None	Yes	Yes
Total jumber No.	Nil	Nil	Yes	Yes
Free life-time software updates regularly	Yes	Yes	No	No
Total cable number required	One USB cable	One USB cable	Two cables  (USB & data cables)	Two cables  (USB & data cables)
Dual Power supply capability	Yes (USB & AC/DC) auto detection/switching	Yes (USB & AC/DC) auto detection/switching	No (Single USB power)	Yes (USB & AC/DC)
Supported Vcc range	3.6V, 5V, 5.5V, 6.5V	3.6V, 5V, 5.5V, 6.5V	5V,6.5V	3.6V,5V,5.6V,6.2V
Supported Vpp range	0V,5V,12V,12.7V,15V,21V,25V	0V,5V,12V,12.7V,15V,21V,25V	12V,15V,21V,25V	12.7V,15V,21V,25V
Auto voltage Control	Yes	Yes	No	No
Working with laptop w/o parrellel port	Yes	Yes	No	No
Programmer Speed performance	Fastest	Fastest	Slow	Slow
Programming Speed sample (read)	25 sec. for (AM29LV320) 13 sec. for (AT49LV1614)	25 sec. for (AM29LV320) 13 sec. for (AT49LV1614)	570 sec. for (AM29LV320) 285 sec. for  (AT49LV1614)	570 sec. for  (AM29LV320) 285 sec. for  (AT49LV1614)
Multi-tasking CPU usage	10%	10%	>98%	>98%
Support software O/S	Win98SE/Me/XP/NT/2k WindowVista	Win98SE/Me/XP/NT/2k WindowVista	Win98SE/Me/XP/NT/2k	Win98SE/Me/XP/NT/2k
Allow User add device on software simply	Yes	Yes	No	No
Device search/  History memory	Yes	Yes	No	No
Works Stable with EPROMs	Yes	Yes	No	Yes
Mechanic DIP Switch/Electronics Switch on boardMCUmall©	None	None	Electronics Switch	Mechanic DIP Switch
Programmer board dimension~ (cm)	15 x 9 x 2	15 x 8 x 1.5	15 x 9 x 1.5	15 x 8 x 1.5
Working set weight(~)	~250g	~200g	~320g	~190g
Status	Active	Active	Active	Legacy
Manufacturer	MCUmall Electronics Inc.	MCUmall Electronics Inc.	MCUmall Inc. affiliate	MCUmall Inc. affiliate

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