LS, MS, VS (Diamond) - Memory, Cache & Video RAM Options

LS, MS, VS (Diamond)
Memory, Cache & Video RAM Options (30/09/96)

Depending on the specific model and the date of manufacture, there are a number of options which may be incorporated in systems utilising the Diamond motherboard. The table below simply shows which options were available - please check the actual combination of options installed in any particular system before deciding on the upgrade required.

Processor	Base Memory	L2 Cache	Video Controller & RAM
Pentium 75 Pentium 100 Pentium 133 Pentium 166 Pentium 200	8 / 16MB EDO	none 256K Asynchronous 256K Pipeline Burst	CL-GD5434 - 1MB CL-GD5436 - 1MB CL-GD5436 - 2MB

4 SIMM slots are available on the motherboard.
SIMMs are installed in matching pairs, giving a total expansion of 128MB.
Extended Data Output (EDO) type SIMMs are supported and give enhanced performance.

Memory Expansion Options

Memory Configurations

The SIMM sockets are located at the front of the motherboard. Each pair of sockets can be fitted with SIMMs. SIMMs with capacities of 2, 4, 8, 16 or 32 Mbytes are supported, giving a maximum capacity of 128 Mbytes.

SIMMs must be fitted in pairs and the pair must be identical. The system does not require parity checking (36-bit) SIMMs. Conventional 32-bit SIMMs with a refresh rate of 70ns is the specification. The newer Extended Data Output (EDO) type SIMMs are supported and will give enhanced performance.

Total Memory	Bank 0	Bank 1	Bank 2	Bank 3
8 Mb	4 Mb	4 Mb	-	-
12 Mb	4 Mb	4 Mb	2 Mb	2 Mb
16 Mb	4 Mb	4 Mb	4 Mb	4 Mb
16 Mb	8 Mb	8 Mb	-	-
20 Mb	8 Mb	8 Mb	2 Mb	2 Mb
24 Mb	8 Mb	8 Mb	4 Mb	4 Mb
32 Mb	8 Mb	8 Mb	8 Mb	8 Mb
32 Mb	16 Mb	16 Mb	-	-
36 Mb	16 Mb	16 Mb	2 Mb	2 Mb
40 Mb	16 Mb	16 Mb	4 Mb	4 Mb
48 Mb	16 Mb	16 Mb	8 Mb	8 Mb
64 Mb	16 Mb	16 Mb	16 Mb	16 Mb
64 Mb	32 Mb	32 Mb	-	-
68 Mb	32 Mb	32 Mb	2 Mb	2 Mb
72 Mb	32 Mb	32 Mb	4 Mb	4 Mb
80 Mb	32 Mb	32 Mb	8 Mb	8 Mb
96 Mb	32 Mb	32 Mb	16 Mb	16 Mb
128 Mb	32 Mb	32 Mb	32 Mb	32 Mb

EDO Memory Expansion

Description	Product Code
4MB SIMM (32-bit)	XB55965
8MB SIMM (32-bit, 2 x 4MB)	XB55966
16MB SIMM (32-bit, 2 x 8MB)	XB55967
32MB SIMM (32-bit, 2 x 16MB)	XB55968

Cache Options (LS, MS, VS except VS660)

Description	Product Code
256KB Async Cache (Diamond)	XB56587
256KB Pipeline Burst (Diamond)	XB56588

Asynchronous Cache allows for 10-15% performance gain

Pipeline Burst Mode Cache improves performance by an additional 10-15%, showing a net effect of >20% improvement in comparison to a cacheless system.

If you have a 75MHz motherboard it will not have a cache SIMM, due to the performance benefits of EDO RAM. If you upgrade the processor at a later date you may require a cache upgrade to improve performance further.

Video Options (LS, MS, VS except LS550 Pentium Pro and VS660)

Description	Product Code
GD5434 1MB to 2MB Video RAM Upgrade	XB54893
GD5436 1MB to 2MB Video RAM Upgrade	XB57374