Why Ati Radeon Mobility x1600 Hypermemory has only 64-bit memory bus?

I have Acer Aspire 5112WLMi which has Ati Radeon Mobility x1600 Hypermemory 128MB up to 512MB
Why Ati Radeon Mobility x1600 Hypermemory has only 64-bit memory bus?
Why it is not 128-bit?
Are all x1600 Hypermemory cards 64-bit?

Screen shot from Everest Ultimate:
http://img108.imageshack.us/img108/447/everestcd1.jpg

 

another image from http://www.notebookforum.at/t6265-meine-x1600-nur-64bit.html

 

that must be why the results for 3dmark05 was quite low for that acer model

 

also table at
http://en.wikipedia.org/wiki/Radeon_R520
claims that all HM(hypermemory) has 64-bit memory bus

 

What sort of 3DMark scores do you get? The X1600 is normally a 128-bit part.

 

yikes, better hope my x1600 (that shud be arriving shortly in me new laptop) is not the HM type

Also the review today said that a 3dmark05 score was 2500

 

3dmark03:4274
3dmark05:2513
3dmark06:1220

 

that's very low for a ATI X1600, which should be hitting 3800 - 4200 in 3dmark05

 

another screenshot from http://www.forum-hardtecs4u.com/yabbse/index.php?board=2;action=display;threadid=38302;start=20

 

The 128MB X1600's typically hit around 2800 stock. 2500 doesn't seem unreasonable, although it isn't as high as it could be. Either way, if the card plays the games you want well, then who cares?

 

first found this situation before buying 5112 at :
http://www.amd-notebooks.de/blog/2006/08/07/eigenarten-und-besonderheitem

then three links in that page:
http://www.chip.de/c1_forum/thread.html?bwthreadid=966891
http://www.notebookforum.at/t6265-meine-x1600-nur-64bit.html
http://www.forum-hardtecs4u.com/yabbse/index.php?board=2;action=display;threadid=38302

all are in german. you can translate them by using babelfish.altavista.com

 

can be 64-bit a special case for amd processor because it has memory contoller on processor instead of motherboard chipset?
you know ddr2 rams have 64-bit memory bus

 

ahhh... isikayhan i think you have something there. Kinda like the new merom processor not running on anything slower than ddr667 memory

 

My 128mb x1600 did ~2790 stock and now with 6.7 catalyst it does ~2910 (both figures give or take a few marks). That is with specs in sig and no OC'ing or real tweaking with ati tray tool.

Exactly why I dont benchmark too much. I do an initial score check and everytime I do a driver update. But otherwise my 3dmark05 demo gets a rare use lable in add/remove. Just because my score is higher then yours doesnt mean Ill play significantly better then you at some games. Although I believe my x1600 is 128bit.

 

can you check memory bus with everest ultimate and post here

 

he have 128 bit i think
i have 5112 i cane play all games like hl2 css bf2 bfv fear doom ect

 

amount of ram bus doesn't effect playable games, but 64-bit ram can cause a bit sloweness comparing to 128-bit

suraj, can you check your 5112 using everest ultimate wheter your one is 64-bit or not.? and if it possible can you post here its screenshot?

 

Nope, completely unrelated. It's simply because a 64-bit bus makes the card cheaper. No big conspiracy theories there, and the CPU isn't involved at all.

 

ATI Tray Tools shows:

Display adapter ATI Mobility Radeon X1600 (0x71C5)
Core Name M56
SubVendor Acer Incorporated (1025)
SubDevice 009F
BUS 1
Device 0
Function 0
Base Address 0 C8000008
Base Address 1 00009001
Base Address 2 C0100000
Base Address 3 00000000

Bus Type PCI Express
SMARTGART Installed No

Driver Version 06.7
Release Version 8.282-060802a-035181C-ATI
QuadBuffer Stereo Support No
Catalyst Registry Path
System\CurrentControlSet\Control\Video\{8893E6AB-1A96-4460-B7ED-52D19B775E61}\0000

______________________________
Clock Information
BIOS VPU 0,00
Current VPU 0,00
BIOS MEM 0,00
Current MEM 0,00

______________________________
Radeon PCI configuration space
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
00 02 10 C5 71 07 00 10 00 00 00 00 03 08 00 00 00
10 08 00 00 C8 01 90 00 00 00 00 10 C0 00 00 00 00
20 00 00 00 00 00 00 00 00 00 00 00 00 25 10 9F 00
30 00 00 00 00 50 00 00 00 00 00 00 00 12 01 00 00
40 00 00 00 00 00 00 00 00 00 00 00 00 25 10 9F 00
50 01 58 02 06 00 00 00 00 10 80 11 00 A0 0F 00 00
60 10 08 00 00 01 0D 00 00 02 00 01 11 00 00 00 00
70 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
80 05 00 80 00 00 00 00 00 00 00 00 00 00 00 00 00
90 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
A0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
B0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
C0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
D0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
E0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
F0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

______________________________
Hardware Information
Installed memory 128 Mb
Memory Type GDDR3
Memory Width 64 bit
Active Rendering Pipelines 4

______________________________
ASIC details
Family 63
Emulated Revision 10
Gfx Engine ID 3

______________________________
Radeon Registers
RADEON_BIOS_0_SCRATCH 00040000
RADEON_BIOS_1_SCRATCH 00000000
GB_TILE_CONFIG 01410011
HWDREG_00000000 210004AC
HWDREG_00000001 00000001
HWDREG_00000002 00000000
HWDREG_00000003 0000000C
HWDREG_00000004 24000388
HWDREG_00000005 00000001
HWDREG_00000006 00000000
HWDREG_00000007 0000000C
HWDREG_00000008 00000005
HWDREG_00000009 00000000
HWDREG_0000000A 00010015
HWDREG_0000000B 110FAC8F
HWDREG_0000000C 33220000
HWDREG_0000000D 00073011
HWDREG_0000000E 00000000
HWDREG_0000000F 0F3FF01A
HWDREG_00000010 0F3FF01A
HWDREG_00000011 0F3FF01A
HWDREG_00000012 0F3FF50A
HWDREG_00000013 0F3FF01A
HWDREG_00000014 0F3FF01A
HWDREG_00000015 000000CA
HWDREG_00000016 000001CA
HWDREG_00000017 0000018A
HWDREG_00000018 0000010A
HWDREG_00000019 0000014A
HWDREG_0000001A 0000060A
HWDREG_0000001B 0000040A
HWDREG_0000001C 0000001A
HWDREG_0000001D 00000012
HWDREG_0000001E 00000017
HWDREG_0000001F 00008028
HWDREG_00000020 00000000

______________________________
Video BIOS Information
Version 009.012.001.015
Part Number LCD/DVI/TV/CRT 475E/375M
Date 2006/06/14 12:26
Vram Type HyperMemory

______________________________
Controller Configurations
Controller 0
Active Connections:
-LCD Panel (Laptop) (0) 1280x800x60
Controller 1
Active Connections:
No Active Connections

______________________________
Displays supported by adapter
0 (1) Monitor (CRT1)
1 (2) LCD Panel (Laptop)
2 (4) TV
3 (8) Digital Flat Panel
4 (16) Component Video Output

______________________________
EnumDisplays
Display Type 0, Extended Type 1 , Max Resolution 1600x1200
Display Type 2, Extended Type 0 , Max Resolution 1280x800
Display Type 1, Extended Type 0 , Max Resolution 1024x768
Display Type 3, Extended Type 1 , Max Resolution 2048x1536
Display Type 4, Extended Type 0 , Max Resolution 720x480

 

So I guess you do have a 64-bit memory bus, interesting. Probably done for cost purposes - Acer is known to do that. They had a system a while back with an ATI X700, and it too had a 64-bit memory bus.

ATI Tray Tools never identifies the memory type right - I doubt you have GDDR3 in there.

 

I own a aspire 1692 with a x700 with 64 mb and I don't know now if it has 64 or 128 bit, but acer is not good for gaming. I think that they try to cut prices in more places and graphics is one of them.

 

it s gddr 2 it s written in ati s homepage
and if u want a good gameing pc from acer i think farrari is one
aspire are budget pc

 

Sorry Suraj, you mean, you Can or you Can't play those games?