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Quick question about Vista 32bit Memory between VRAM/System Ram. Contemplating 64bit

post #1 of 4
Thread Starter 
I'm currently running the rig in my sig with Windows Vista 32bit. Going to either add another GTX 275 or will buy a 1-2gb GTX 560ti or 6950

Newegg has Windows 7 64bit on sale right now for $85 so I am contemplating upgrading

I know Vista 32bit limits system memory to 3gb so I don't have use of all 4gb of my ram. However, does that include my 768mb VRAM on the GTX 275? Which is soon to be 1gb or 2gb with a 560ti or 6950.
post #2 of 4
Time to upgrade to a 64bit OS

32bit limits you to 4gb Total system ram + VRAM. More VRAM = less usuable DRAM
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Pre OCN build
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post #3 of 4
Thread Starter 
You 100% sure about that? I've heard both it does and doesn't. So confused lol
post #4 of 4
Quote:
Originally Posted by scheibler View Post
You 100% sure about that? I've heard both it does and doesn't. So confused lol
2^32(bit) = 4,294,967,296 bytes

You can have a MAX of 4gb addressable memory. Graphics cards will use the most ram address space, and in DX9 graphics cards would use their entire framebuffer's worth of VRAM in system RAM (so a dual 1GB crossfire setup would only leave you with 2gb of usable system ram). In DX10/11 this problem doesn't exist as much, but I would still strongly urge a 32-bit user NOT to have a dual graphics card setup, as you'll be losing a lot more system ram to the cards.

Don't forget, it's not only graphics cards that can eat away at what the OS can hand out to programs - other hardware such as raid controllers etc and the pagefile also chip away at it.
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space heater
(29 items)
 
S-HVH-01
(11 items)
 
PfSense
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CPUMotherboardGraphicsRAM
Intel 2500k 4.7GHz  Asus P8P67 Pro(B3) 2 x Club3D 280X 3GB 16GB g.skill 1600MHz C9 
Hard DriveHard DriveHard DriveHard Drive
Samsung 840 Pro 256GB 4 x 2TB Barracudas in RAID10 2 x WD Blue 1TB RAID0 2 x 3TB Seagate Barracuda 
Hard DriveHard DriveOptical DriveCooling
8 x 146GB HP 10k SAS - various RAID levels RAID Controller LSI 9260-8i 512MB LiteOn IHAS124 Noctua NH-D15 
OSMonitorMonitorMonitor
8.1 Enterprise Acer GD245HQ (120hz) LG W2420P LG IPS231P 
MonitorMonitorKeyboardPower
HP ZR24w LG 32LH3000 (w/IPS) Razer Blackwidow Antec TruePower New 750W 
CaseMouseAudioAudio
Corsair 750D Modified original G5 Asus Xonar PCIe Sennheiser HD595 
AudioAudioAudioAudio
Tannoy Mercury 5 NAD C165BEE Bowers & Wilkins 683 Cambridge Audio DACMagic+ 
CPUCPUMotherboardRAM
Intel® Xeon® Processor E5-2630 v3 (20M Cache, 2... Intel® Xeon® Processor E5-2630 v3 (20M Cache, 2... Lenovo RD650 128GB DDR4 ECC REG 
Hard DriveHard DriveHard DriveHard Drive
720ix 12Gbps SAS RAID Controller with 1GB FBWC RAID 0 - 2 x Intel S3500 120GB SSD (deduped VHD... Intel 530 120GB SSD RAID 10 - 8 x Seagate 146GB 10k SAS  
OSPowerCase
Windows Hyper-V Server 2012 R2 2 x LiteION 750W 80PLUS Platinum RD650 24x2.5" chassis 
CPURAMHard DriveOS
Intel® Xeon® Processor X5650  8GB ECC 2 x 146GB SCSI RAID1 PfSense 2.2b 
Other
Intel 4 x 1GbE 
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Overclock.net › Forums › Software, Programming and Coding › Operating Systems › Windows › Quick question about Vista 32bit Memory between VRAM/System Ram. Contemplating 64bit